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TI’s sensing technology for smart home appliance

TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

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Page 1: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

TIrsquos sensing technology for smart home appliance

2

Smart connection

Smart sensing

Smart HMI

Sensing in smart home

Making an easy way to communication

Monitoring the environment at home

3

TI is sensing the world

Current Power Current Shunt

Magnetic

Humidity

HDC Humidity Sensor Family

Bio-sensing

Pulse Rate Pulse Oximetry

Body Composition

Bio Potential

Optical Scanning (DLP) Chemical

Optical Analog

Front Ends

Pressure

Precision Signal Conditioning

Light 3D Time of

Flight DLP

Ambient Light (ALS)

Temperature Temperature

Sensors Passive Infrared

Temperature amp Humidity

Occupancy

Ultrasonic Passive Infrared

3D Time of Flight

Proximity

Hall Inductive

Ultrasonic Capacitive

Gas Fluid Electrochemical amp NDIR

Analog Front Ends

Ultrasonic Capacitive

Position

Ultrasonic Hall Effect

Inductive Optical

Current Shunt Capacitive

Material

Inductive Optical

Ultrasonic Capacitive

4

bull Inductive sensing

bull Humidity sensing

bull 3D-ToF

bull Capacitive sensing

bull Temperature sensing

Agenda

5

Inductance-to-digital converters (LDCs) for inductive sensing

Key inductive sensing applications

Inductive sensing solutions Target applications

Target

LDC chip PCB coil Conductor

Inductancendash

tondashdigital

TIrsquos LDC Converters

New LDCs

Multi-channel easy-to-use

LDC13124 2-4-ch 33-V 12-bit

LDC16124 2-4-ch 33-V 28-bit

LDC 8051 2-ch OnOff switcher

6

Switches

Knobs

Buttons

Keypads

Encoders

Rotation sensing

Metal detection

Key system feature

Full metal

Full glass

Contactless sensing

Low-cost sensor

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 2: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

2

Smart connection

Smart sensing

Smart HMI

Sensing in smart home

Making an easy way to communication

Monitoring the environment at home

3

TI is sensing the world

Current Power Current Shunt

Magnetic

Humidity

HDC Humidity Sensor Family

Bio-sensing

Pulse Rate Pulse Oximetry

Body Composition

Bio Potential

Optical Scanning (DLP) Chemical

Optical Analog

Front Ends

Pressure

Precision Signal Conditioning

Light 3D Time of

Flight DLP

Ambient Light (ALS)

Temperature Temperature

Sensors Passive Infrared

Temperature amp Humidity

Occupancy

Ultrasonic Passive Infrared

3D Time of Flight

Proximity

Hall Inductive

Ultrasonic Capacitive

Gas Fluid Electrochemical amp NDIR

Analog Front Ends

Ultrasonic Capacitive

Position

Ultrasonic Hall Effect

Inductive Optical

Current Shunt Capacitive

Material

Inductive Optical

Ultrasonic Capacitive

4

bull Inductive sensing

bull Humidity sensing

bull 3D-ToF

bull Capacitive sensing

bull Temperature sensing

Agenda

5

Inductance-to-digital converters (LDCs) for inductive sensing

Key inductive sensing applications

Inductive sensing solutions Target applications

Target

LDC chip PCB coil Conductor

Inductancendash

tondashdigital

TIrsquos LDC Converters

New LDCs

Multi-channel easy-to-use

LDC13124 2-4-ch 33-V 12-bit

LDC16124 2-4-ch 33-V 28-bit

LDC 8051 2-ch OnOff switcher

6

Switches

Knobs

Buttons

Keypads

Encoders

Rotation sensing

Metal detection

Key system feature

Full metal

Full glass

Contactless sensing

Low-cost sensor

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 3: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

3

TI is sensing the world

Current Power Current Shunt

Magnetic

Humidity

HDC Humidity Sensor Family

Bio-sensing

Pulse Rate Pulse Oximetry

Body Composition

Bio Potential

Optical Scanning (DLP) Chemical

Optical Analog

Front Ends

Pressure

Precision Signal Conditioning

Light 3D Time of

Flight DLP

Ambient Light (ALS)

Temperature Temperature

Sensors Passive Infrared

Temperature amp Humidity

Occupancy

Ultrasonic Passive Infrared

3D Time of Flight

Proximity

Hall Inductive

Ultrasonic Capacitive

Gas Fluid Electrochemical amp NDIR

Analog Front Ends

Ultrasonic Capacitive

Position

Ultrasonic Hall Effect

Inductive Optical

Current Shunt Capacitive

Material

Inductive Optical

Ultrasonic Capacitive

4

bull Inductive sensing

bull Humidity sensing

bull 3D-ToF

bull Capacitive sensing

bull Temperature sensing

Agenda

5

Inductance-to-digital converters (LDCs) for inductive sensing

Key inductive sensing applications

Inductive sensing solutions Target applications

Target

LDC chip PCB coil Conductor

Inductancendash

tondashdigital

TIrsquos LDC Converters

New LDCs

Multi-channel easy-to-use

LDC13124 2-4-ch 33-V 12-bit

LDC16124 2-4-ch 33-V 28-bit

LDC 8051 2-ch OnOff switcher

6

Switches

Knobs

Buttons

Keypads

Encoders

Rotation sensing

Metal detection

Key system feature

Full metal

Full glass

Contactless sensing

Low-cost sensor

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 4: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

4

bull Inductive sensing

bull Humidity sensing

bull 3D-ToF

bull Capacitive sensing

bull Temperature sensing

Agenda

5

Inductance-to-digital converters (LDCs) for inductive sensing

Key inductive sensing applications

Inductive sensing solutions Target applications

Target

LDC chip PCB coil Conductor

Inductancendash

tondashdigital

TIrsquos LDC Converters

New LDCs

Multi-channel easy-to-use

LDC13124 2-4-ch 33-V 12-bit

LDC16124 2-4-ch 33-V 28-bit

LDC 8051 2-ch OnOff switcher

6

Switches

Knobs

Buttons

Keypads

Encoders

Rotation sensing

Metal detection

Key system feature

Full metal

Full glass

Contactless sensing

Low-cost sensor

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 5: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

5

Inductance-to-digital converters (LDCs) for inductive sensing

Key inductive sensing applications

Inductive sensing solutions Target applications

Target

LDC chip PCB coil Conductor

Inductancendash

tondashdigital

TIrsquos LDC Converters

New LDCs

Multi-channel easy-to-use

LDC13124 2-4-ch 33-V 12-bit

LDC16124 2-4-ch 33-V 28-bit

LDC 8051 2-ch OnOff switcher

6

Switches

Knobs

Buttons

Keypads

Encoders

Rotation sensing

Metal detection

Key system feature

Full metal

Full glass

Contactless sensing

Low-cost sensor

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 6: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

Key inductive sensing applications

Inductive sensing solutions Target applications

Target

LDC chip PCB coil Conductor

Inductancendash

tondashdigital

TIrsquos LDC Converters

New LDCs

Multi-channel easy-to-use

LDC13124 2-4-ch 33-V 12-bit

LDC16124 2-4-ch 33-V 28-bit

LDC 8051 2-ch OnOff switcher

6

Switches

Knobs

Buttons

Keypads

Encoders

Rotation sensing

Metal detection

Key system feature

Full metal

Full glass

Contactless sensing

Low-cost sensor

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 7: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

7

Inductive sensing ---- basic physics

Two parameters change as conductive plate

enters the inductorrsquos magnetic field

1) Resonance impedance (Rp)

2) Inductance (L)

LDCINDUCTANCE TO DIGITALCONVERTER

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 8: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

8

System example --- ToM buttons for kitchen ventilator Touch-on-Metal Touch-on-Plastic Touch-on-Glass

No touch

Flat metal surface no deflection Finger light touchpress

Metal surface deflects by ~5μm

Button deflection depends on

bull Type of metal

bull Thickness of metal

bull Diameter of button

bull Etched pattern beneath

Can be detected with LDC

Sensor coil on PCB

ldquoMetal buttonrdquo area

PCB

bull Programmable threshold for different sensitivities and multi-function buttons

bull One continuous grounded sheet of metal ndash sealed to wateroildirt immune to EMI

bull Works with gloves

bull No moving parts ndash Haptics may be integrated

System

benefits

bull Industrialwhite goods refrigerator range hoods dishwashers washing machines thermostat

weigh scales EPOSPOS

bull Automotive buttons on infotainment systems or steering wheels

bull Consumer cameras mobile devices weigh scales

Target end

equipment

bull Buttons pressureweightforce sensing Uses

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 9: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

9

LDC13124 2-4-ch 33-V 12-bit LDCs for inductive sensing

bull Multiple channels

bull 2-ch LDC1312 4-ch LDC1314

bull Well matched channels w 133 ksps max sampling rate

bull Sensor frequency range 1kHz to 10 MHz

bull Power consumption

bull Active 540uAch (LDC1314)

bull Sleep 35uA Shutdown 200nA

bull Package

bull LDC1312 12-pin WSON

bull LDC1314 16-pin WQFN

Features

Applications

bull Knobs in consumer appliance amp automotive

bull Incremental linear and rotational encoders

bull Buttons in home electronics wearable amp factories

bull Keypads HMI and POS in factories amp appliances

bull Slider buttons in consumer

bull Metal detection in industrial amp consumer

bull Flow meters in consumer and appliances

bull Up to four channels enables multiple sensors in minimum

system size cost and power

bull Well-matched channels allow for easy compensation of

environmental changes and aging

bull Easy-to-use sensor just needs to be within 1kHz and 10 MHz

simplifying and accelerating prototyping

bull Large sensor frequency range supports very small PCB coils

supporting space-constrained applications

Benefits

LDC1314

LDC1314

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 10: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

10

Inductive sensing Roadmap

Released

LDC1000 (Q1)

1-Ch 5V SPI

16-bit Rp | 24-bit L

SON-16 (TSSOP16)

LDC104151

1-Ch 5V SPI

Midlow-res LDC

LDC131x

24-Ch 33V

12-bit L-only

I2C

LDC161x

24-Ch 33V

28-bit L-only

I2C

LDC1101

1-Ch 18V SPI

16-bit Rp | 16-bit L

DFN-10

Hig

h

Lo

w M

id

Sw

itch

fun

cti

on

Reso

luti

on

2015 2016

5V CORE 33V CORE 18V CORE Auto Qual

LDC131x-Q1

24-Ch 33V

12-bit L-only

I2C

LDC161x-Q1

24-Ch 33V

28-bit L-only

I2C

LDC8051-Q1

1-Ch switch

ldquo2-wirerdquo

LDC2114

4-Ch 18V

ToM Button

w Built-in

Algorithms

LDC08xx

1-Ch 18-33V

L-only switch

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 11: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

How to start inductive sensing --- TI design

Event counter (TIDA-00851-LDC0851)

Removable knob 1deg dial (TIDA-00508)

Incremental encoder

(TIDA-00828) (TIDA-00615)

Touch-on-aluminum (TIDA-00314)

Touch-on-stainless steel (TIDA-01102)

Snapdome buttons (TIDA-00509)

Use cases

Dials

Wheels

knobs

Buttons

Flow meter

Smartphonewearable buttons

11

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 12: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

12

How to start inductive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchinductive-sensingpage

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 13: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

13

Stainless steel inductive touch TIDA-01102

bull 06mm 304 annealed stainless steel 4 Finish

bull Printed or etched patterns on the surface are possible

bull Outer frame makes improves button appearance

bull Inner frame is the psychological button area

encouraging user to push in the center

bull GUI to provide button push and force sensing information

bull Adjustable sensitivity

bull Includes Audio and Haptics feedback

bull Product LDC1614

Features

bull Replaces mechanical buttons with high-resolution inductive-

sensing based touch-on-metal detection

bull One continuous sheet of metal sealed and grounded against

Electromagnetic Interference (EMI) water oil dirt and other

contaminants

bull Works with gloves underwater (if sealed) and in harsh

environments

bull Can be used for pressure and multi-step button press

sequences

Benefits

Markets amp Applications

bull Industrialwhite goods refrigerator range hoods

dishwashers washing machines thermostat weigh scales

EPOSPOS

bull Automotive buttons on infotainment systems or steering

wheels

bull Consumer cameras mobile devices wearables httpwwwticomtoolTIDA-01102

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 14: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

14

Knob-on-glass demo Rotational sensing on glass surface using LDC1314

bull Instant absolute position detection on start-up

bull Using LDC1314 and MSP430

bull Easy-to-use and scalable rotational sensing design

bull Standard FR4 PCB design allows for low cost system design

bull Uses one-turn simple calibration

bull Achieves 5deg accuracy - 10deg steps displayed in GUI

bull Micro USB connection and clean GUI on the PC to display

the angle and select settings

bull Product LDC1314

Features

bull Standard FR4 PCB process

bull Off-the-shelf parts

bull No look-up table is required

bull Great stability and consistency

bull Easily attach the knob on glass surface with a magnet

bull Easy one-turn calibration methods suits multiple applications

Benefits

Markets amp Applications

bull Rotational sensing in Automotive Knobs for HVAC amp

Infotainment

bull Rotational sensing in White Goods Knobs on washing

machines dryers coffee machines cooktops etc

bull Rotational sensing in Industrial HMI knobs

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 15: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

LDC0851 flowmeter reference design TIDA-00851

bull Contactless non-magnetic approach to impeller-based

flowmeter design using LDC technology

bull Easy-to-use and scalable event counting design

bull High speed sensing up to 4000 events per second

bull Temperature stable switching operation

bull Simple highlow output easily converted to rotational

speed with MSP430

bull LCD readout to easily display real time flow rate

Features

bull No magnets needed

bull Sensor can be placed on the outside of the container

remotely with respect to LDC0851 device

bull Safe for food-grade applications

bull No calibration required

bull Insensitive to environmental hazards such as dirt oil

dust moisture

Benefits

Markets amp Applications

bull Event counting in Automotive Wheel speed sensing

bull Event counting in White Goods Flowmeters in coffee

machines fan speed sensing impeller-based flowmeter

bull Event counting in Industrial Water metering

Tools and Resources

bull Design Files amp User guide

bull Device Datasheets bull LDC0851

bull MSP430F5500

bull TPD2E001

bull LP5951

15

httpwwwticomcntoolcnTIDA-00851-

LDC0851

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 16: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

16

Humidity sensing

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 17: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

17 17

Refrigerator

Thermostat

HDC

HDC humidity sensor is

used in refrigerator to

monitor the chilling point

HDC

HDC humidity sensor is

used in microwave oven

to optimize the output

power

Microwave oven

HDC HDC humidity sensor

is used in dryer to

monitor the exhaust

air to optimized

power consumption

and dry level Dryer

Humidity sensors are EVERYWHERE

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 18: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

18

Dust falls on top of the sensing element reducing the performances until the complete blockage of the sensor

Some competitors suggest to cover the sensor with a filtergrid (very expensive more than the device itself)

bull HDC100x has the sensing element on the bottom part of the sensor

bull Sensing element is intrinsically protect from the dust that falls on the top part

Classical solution in DFN package

Polyimide PCB

CSP

Die

Humidity Moisture

Dust

Humidity sensor

Sensing Element

Polyimide

Dust

HDC100x intrinsic dust resistant structure

System challenge in humidity ---- dust

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 19: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

19

Completely integrated humidity and temperature IC

provides guaranteed performance

Fully calibrated sensor enables quick time-to-market

Very low power consumption

Small package size supports compact designs

Applications HVAC

White goods (dryer fridge microwave dishwasher)

Printers

Handheld Meters

Camera Defog

Smart Thermostats and Room Monitors

Medical Devices

Features Benefits

HDC1080 Humidity amp temperature sensor

Relative Humidity Range 0 to 100

Humidity Accuracy plusmn2

Supply Current (Measuring) 180uA

Avg Supply Current (1sps) 12uA

Temperature Accuracy plusmn02ordmC

Temperature Range (Operating) -20ordmC to +85ordmC

Temperature Range (Functional) -40ordmC to +125ordmC

Operating Voltage 3V to 5V

Package

6 pin DFN HDC1080 (3mm x 3mm)

I2C Calibration amp

Temp

Compensation

Temp

Sensor EEPROM

Polyimide Capacitance-to-

Digital Converter

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 20: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

Roadmap

3x3mm

HDC1080

27-55V

DFN-6

HDC1010

27-55V

WCSP

Legend Production Develop

3x3mm

HDC2080

17-36V

DFN-6

Supply voltage = 27V - 55V

HDC2080

17-36V

WCSP

16x204mm 15x15mm

Supply voltage = 16V - 36V

20

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 21: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

21

TIDA-00374 Humidity amp Temp Sensor Node for Star Networks Enabling 10+ Year Coin

Cell battery life

TI Designs TI Designs

TIDC-CC2650STK-SENSORTAG

bull Support for 10 low-power sensors including

ambient light digital microphone magnetic

sensor humidity pressure accelerometer

gyroscope magnetometer object

temperature and ambient temperature

bull Ultra-low power with years of battery life

from a single coin cell battery and enabling

battery-less applications through the high-

performance ARMreg Cortexreg-M3 CC2650

wireless MCU

bull Multi-standard support enables ZigBee or

6LoWPAN through a simple firmware

upgrade

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (183 nA for 5997 seconds)

bull Ultra Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (404 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00484

Humidity amp Temp Sensor Node for Sub-1GHz Star Networks Enabling 10+ Year Coin Cell battery life

bull Use of Nano-Power System Timer to Duty-Cycle the System

Results in 10+ Year Battery Life from CR2032 Coin Cell

bull Configurable System Wakeup Interval

bull Extremely Low Off-State Current (270 nA for 5997 seconds)

bull Ultra-Low On-State Current Due to Low Active Processor and

Radio Transmit Currents (3376 mA for 30 ms)

bull plusmn2 Relative Humidity Accuracy

bull plusmn02degC Temperature Accuracy

TIDA-00524

Ultralow Power Multi-sensor Data Logger with NFC Interface Reference Design

bull 5 Year Battery Life on a CR-2032 coin cell

bull RF430 NFC Dynamic Tag Type 4B Compliant Communication

bull NFC configuration and data read back

bull Multiple Sensor Options

bull Temperature (TMP112)

bull Ambient Light (OPT3001)

bull Humidity + Temperature (HDC1000)

bull Up to 64KB of non-volatile FRAM memory

bull Data is DateTime stamped using RTC

How to start humidity sensing --- TI design

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 22: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

22

Humidity amp temperature sensing node for star networks enabling 10+ year coin cell battery life

bull HDC1000 humidity and temp digital sensing

bull Detect relative humidity from 0 ndash 100

plusmn3 accuracy

bull Detect temp at plusmn02degC (nominal) over 5degC to 60degC

bull Configurable sleep time

bull Power management partitioning for extremely low

power consumption

bull Small integrated solution size due to the integrated

sensor and radio SoC

bull Long Battery Lifetime Designing for 10+ years off a

single CR2032 coin cell battery

Solution Features Solution Benefits

Tools amp Resources

bull ltTIDA-00374 Tools Foldergt

bull ltUser Guidegt

bull Design Files Schematics BOM

Gerbers Software and more

bull Device Datasheets bull HDC1080

bull TPL5110

bull TS5A3160

bull CC2x

TI Designs Number TIDA-00374

I2C

30V

MOS_DRV

30V

TPL5110(Ultra-low power

nanotimer)

CC2x(MCU + 24 GHz)

Coin Cell Battery(CR2032)

HDC1080(Humidity amp

Temp)

TS5A3160(Ultra-low

leakage switch)

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 23: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

23

3D Optical Time of Flight (ToF) Solutions

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 24: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

24

Typical applications

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 25: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

25

3D technologies - overview Time Of Flight

bull Modulated light is sent out and the phase

difference between Transmit amp Received

signal is measured

bull Phase delay is used to calculate the depth

Stereoscopic Structured

bull Two or more cameras at different angle

retrieve RGB images

bull Image processing SW identifies common

feature triangulates and finds depth

bull IR source projects patterns on object IR

sensor records the deformation of pattern

bull Image is processed in software to calculate

depth

Stereoscopic vision Structured light

Time of Flight Fixed pattern Programmable Pattern (DLP)

Depth accuracy low medium (mm to cm) high (um to mm) medium mm to cm

Scanning Speed medium Slow Slowmedium fast

Distance Range Mid range Very short to mid range Very short to mid range short to long range

HW cost low middle middlehigh middle

SW complexity High (correspondence prob) lowmiddle middlehigh low

Low Light Performance weak good good good

Outdoor Performance good weakfair weakfair good

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 26: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

26

Application Processor or PC

3D technologies solutions

Camera

DLP

Controller

User defined

Patterns

Point Cloud

Generation

SW

Illuminator

ToF

Controller

ToF

AFE

ToF

Sensor

Video

Analytics

Middleware

SW

Application

SW

Captured Image

Point Cloud

Point Cloud

LED

Driver LEDs

Illuminator LED

Driver LEDs

Programmable Structured Light

Identificatio

n amp

Tracking

Time of Flight (ToF)

Stereoscopic Offset Images

Digital

Micromirror

(DMD)

26

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 27: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

27

Theory of operation

21

43arctanQQ

QQ

22

f

cd

Distance measured by emitting a modulated light and measuring phase

delay of returned light

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 28: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

28

Key Care-About Why 3D-TOF

Clean around pets cable cords and

furniture 320 x 240 pixels 60fps sufficient to see chair legs and small wires

Vacuum more efficiently 320x240 pixels 60fps with good depth resolution sufficient for room mapping and to execute planned path

Lower cost 80x60 model also available

Self docking and recharging High pixel count and depth enable automatic alignment for docking and self-recharge

Easy to program and interact 3D-TOF enable segmenting of human (foreground) from background using depth and then recognize hand and

body gesture from the foreground image

Operate in dark Active IR illumination allows operation in both daylight and in dark

Potential Solutions

Stereo Vision

Structured Light

3D Time-of-Flight (3D-TOF)

LiDAR

Ultrasound

28

System example --- cleaning robot

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 29: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

29

OPT8241OPT9221 system diagram

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 30: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

30

OPT8241OPT9221 DepthSensetrade chipset

bull Measures Phase with QVGA

(320x240) resolution

bull 13rdquo Optical Format

bull Up to 120fps frame rate

bull Integrated Functions

ndash Global Reset

ndash Global Shutter

ndash Dynamic Region of Interest

ndash Dynamic Illumination control

bull 875 mm x 785mm Optical BGA-78

package

ndash IR pass filter (820nm to 865nm)

bull Operating Temperature

0degC to +70degC

Sensor OPT8241

bull QVGA TOF Controller + Phase processing

engine

bull Output Interface DVP (CMOS Parallel) or

SSI

bull I2C Slave control interface

bull Depth Output Data

ndash 12-bit Phase

ndash 12-bit Confidence (Signal Strength)

ndash 4-bit Ambient

bull Integrated Functions

ndash Pixel Saturation Detection

ndash Phase De-aliasing

ndash Depth Calibration

bull 9-mm times 9-mm BGA-256

bull Operating Temperature 0degC to +85degC

TOF Controller OPT9221

TFC

Sensor

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 31: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

31

OPT8241 Camera Development Kit (CDK)

Deliverables bull Complete evaluation kit including LED

illumination Lens Sensor and TFC USB

Interface Comes with driver

documentation schematics layout and

BOM list

bull 3D-Explorerreg Software allows register

control and depth map visualization Win7

amp Linux compatible

bull TOF Design whitepapers and app notes

available from TI

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 32: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

People counting using 3D Time-of-Flight for demand controlled ventilation ref design

bull Accuracy gt 90

bull Sensor Resolution 320 x 240 (QVGA) Array of ToF Pixels

bull Wide Field of View H74deg x V593deg

bull Fast Response Time Occupancy data available in real-time

bull Being Independent of ambient light 3D ToF camera can see in

the dark with Auto-Illumination

bull Four NIR Lasers provide large illumination area

bull Short diffused laser pulses inherently eye-safe

bull No Moving Parts or Periodic Calibration required

bull Save energy and energy cost and offers better indoor air quality

by controlling the HVAC system based on occupancy

bull Monitor people for safety security or control without infringing

on their privacy

bull Distance thresholds can ignore petrsquos motion in residential

applications

Solution Features Solution Benefits

Tools amp Resources

TI Designs Number TIDA-00750

bull TIDA-00750 Tools Folder

bull User Guide

bull Device Datasheets bull OPT8241

bull OPT9221

bull AM4379

bull OPT8241-CDK-EVM

bull MYIR AM437x Rico Board 32

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 33: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

33

Capacitive-to-digital converters

(FDCs) for capacitive sensing

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 34: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

34

Key capacitive sensing applications

Detect liquid level in container

Markets

bull White goods

bull Automotive

bull Medical

Markets

bull White goods

bull Industrial

bull Automotive

bull Personal electronics

Markets

bull Industrial

bull Automotive

Liquid level sensing

Detect presence simple gestures

Proximity amp simple gesture sensing

Detect object in path of motion

Collision avoidance

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 35: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

Change in capacitance is dictated by 120576119903 dielectric constant of the material if plate area and distance between plates

are kept constant Parallel plate capacitor

119862 = 120576119900120576119903 119860

119889

120576119900

120576119903

A

d

Permittivity of free space (8854 x 10-12 Fm)

Dielectric constant of material

Area of plate

Distance between plates

bull Equation above can also be used to

estimate capacitance for fringing field

applications

Electric flux density plot

- Shows the density of the electric

field lines

- Field lines within the inner edges of

the plates dominate the capacitance

measurements (purple region)

Sensor Ground

Shield

Capacitive sensing ---- basic physics

35

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 36: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

36

TI cap-to-digital vs traditional cap-to-digital

Charge-Based Measurement

bull Wideband input antenna

bull Noise aliased in-band after sampling

Highly susceptible to noise

Example Time-basedDischarge

Traditional Cap-to-Digital

Oscillation-Based Measurement

bull High-Q narrowband bandpass filter

bull Strong noise rejection

Immune to noise

FDCXXXX

Frequency-to-digital

converter

CIN

LFIXED

CIN

EMI Resistant 1 Narrow band architecture eliminates unwanted noise and interferences

lt041fF noise with fluorescent lamp

Fast sample rate Up to 133Ksps sample rate enables duty cycling for low-power applications

Highest capacitive

sensing range 250nF range easily allows compensation of changing conditions

Feature Benefits

Low-cost

flexible sensor Sensors are metal strips wires or PCB traces enabling flexible designs

2

3

4

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 37: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

37

System example --- level detection for coffee machine

bull White goods coffee maker refrigerator

bull Automotive fuel level washer fluid level coolant level

bull Industrial process control drug pens insulin pumps

Target end

equipment

bull Measure liquid level in a container measure flow rate Uses

bull Low-cost level sensor

bull Can achieve 05 level accuracy robust to interference System benefits

Sensor to obstacle (human) distance 2mm

System solution 3 electrode (1 level + 2 reference)

Full-scale 50mL resolution 02mL

water level coffee machine auto-injectors

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 38: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

38

FDC22124 2-4-ch 33-V 28-bit FDCs for Capacitive Sensing

bull Number of channels Packages

bull 2 (FDC2x12) 12-pin QFN

bull 4 (FDC2x14) 16-pin QFN

bull Maximum Input Capacitance 250nF (10kHz with 1mH

inductor)

bull Maximum output rate (one channel) 133ksps (FDC211x)

bull Resolution 28-bit

bull Sensor excitation frequency 10kHz to 10MHz

bull Supply voltage 27V to 36V

bull Power consumption

bull Active 21mA

bull Low-Power Sleep Mode 35uA

bull Shutdown 200nA

bull Interface I2C

bull Two and four channels enables multiple sensors in

minimum system size and cost

bull EMI-resistant architecture

bull High excitation rate

bull High output data rate

bull Large maximum input cap value

Features Benefits

bull Human proximity detection up to 50cm

bull Object proximityobstacle detection up to 50cm

Applications

FDC2214

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 39: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

39

How to start Capacitive sensing --- WEBENCHreg

Full WEBENCHreg support httpwwwticomlsdstianalogwebenchcapacitive-sensingpage

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 40: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

40

How to start capacitive sensing --- TI design

Proximity sensing

TIDA-00466 TIDA-00474 TIDA-00373 Touch on glass

TIDA-00464

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 41: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

41

TIDA-00474 Proximity sensing of up to 30CM range with gt 15dB SNR and robust capacitive touch reference design

bull Capacitive sensing based buttons and Proximity sensing

implementation using FDC2114FDC2214 having 28 bits of

resolution

bull MSP430G2xx MCU for ultra low power operation

bull Very low standby current consumption

bull Average lt1mA

bull TPS92513 based LED lights (2) with dimming function

bull LMT01 based hood temperature sensing and humidity

sensing with HDC1050 to enable automatic speed variation

based on conditions under the hood

bull Isolated UART interface for communication with motor drive

Features bull 6 capacitive touch keys implementation for robust touch detection against moisture

and other disturbances

bull Proximity sensing implementation and test results with copper on PCB and ITO

(indium tin oxide) based implementations

bull 2 channels of high resolution proximity sensing providing tested hardware platform for

the implementation of gesture recognition

bull Proximity sensing up to 30cm enabling automatic wakeup and PWM dimmable

automatic lighting control

bull Low power consumption during standby Less than 1mA current consumption on DC

power supply during standby

bull Highly integrated LED driver circuit on board with digital dimming over current

protection over temperature protection and adjustable under voltage-lock-out

functions

bull Provision for temperature sensing and humidity sensing

Benefits

bull Kitchen hoods

bull Kitchen Appliances With Touch and Proximity Sensing

Interfaces

Applications

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 42: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

42

bull Single and multi-step button press

bull Four robust buttons option implemented

bull Variable air gap between buttons and glass (1-2mm)

bull Power consumption (~8Hz scan) 75microA

bull Temperature range -40degC to 125degC

bull Finger detection through tick glass (8 ndash 12 mm)

bull Work with gloves and in harsh environment (water oil dust)

bull Easy to use

bull HMI in Industrial Touch buttons in Harsh Environments

High temperature glass touch reference design Highly robust touch buttons ndash TIDA-00464

Features Benefits

Markets amp Applications

httpwwwticomtoolTIDA-00464

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 43: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

43

Temperature sensing

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 44: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

44

Temp sensors are EVERYWHERE

Refrigerator

Thermostat

Wearable Gas Meter

Air Conditioner

System

Challenges

bull Multi channels

bull Long distance

bull High accuracy

bull Non-linear

bull Low power

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 45: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

45

Commonly Used Temperature Sensors

Criteria

Temp Sense IC

Thermistor RTD Thermocouple

IR Temp Sensor

Temp Range -55degC to +150degC -100degC to +500degC -240degC to 700degC -267degC to +2316degC -100degC to +500degC

Accuracy Good Depends on

Calibration Best Good

Depends on

Calibration

Linearity Best Low Better Better Better

Requires

support circuitry No Yes Yes Yes Yes

Price Low-Moderate Low-Moderate Expensive Expensive Moderate-Expensive

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 46: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

46

IC Temp

Sensor

Silicon (IC) Temperature Sensors

Advantages

bull Accuracy is guaranteed across a broad temperature

range (-55oC to 200oC)

bull Zero Calibration

bull Highly Linear

bull Low noise sensitivity

bull Low power (lt25uW possible with integrated ADC)

bull Compact Packaging options (down to 064mm2

footprint)

bull Fast Response

bull Standard CMOS process

bull Economies of scale

bull Reliability

bull Integration

Principle

IC sensors leverage the highly predictable thermal

characteristics of a silicon PN junction

I Vbe

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 47: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

System example --- Off board temperature solutions

Pulse Counter (LMT01) bull Only 2 pins

bull Simple Pulse Counter (1 pulse = 1 LSB)

New Topologies

Integrated ADC with industry standard interfaces (I2C SPI UART)

bull Guaranteed Accuracy

bull Programmable sampling rate amp alerts

bull Noise Immunity

Daisy Chain (TMP107) bull UART interface

bull Auto Addressing

47

Saving the system cost by saving cables

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 48: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

48

MCU

LMT01 digital pulse counter interface

34uA

125uA

GPIO 1

GPIO 2

Comparator

Up to 2m LMT01

Iout

Iout

Current is modulated between 34uA and 125uA to create a series of pulses

1 Pulse = 1 LSB

119879119890119898119901 = 119900119891 119901119906119897119904119890

4096119909 256 minus 50

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 49: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

49

TMP107 SMAART wiretrade interface

MCU TX

RX

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

Host sends initialization address to the First Device in Chain Device stores this Address in EEPROM 1st Device Acknowledges the host Increments the address and passes along which is stored by 2nd Device

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

2nd Device Acknowledges the host Increments the address and passes along which is stored by 3rd Device

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

This process continues until the last device Acknowledges the Host

TMP107

V

GND

I01 I02

TMP107

LOGIC

EEPROM

TMP107

V

GND

I01 I02

Bus Times out and chain is back to forward buffer

All the devices know their position in the bus for any further reads and writes

bull frac12 Duplex UART interface

bull Auto addressing based upon location in the chain

bull Non-volatile memory is available to store address amp programming

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 50: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

50

LMT01 LMT01-Q1

bull TI Designs

bull TIDA-00752 (Isolation)

bull TIDA-00765 (Strain Gauge)

bull TIDA-00779 (Power Factor)

bull TIDA-00474 (Cap Touch)

bull Device Datasheets

‒ LMT01

bull EVM

‒ LMT01EVM

bull Easy-to-use digital output interface with no need for an ADC

bull Noise-free operation even on cables up to 2 meters long

bull 2-pin thermistor replacement with digital output

bull Packages allow for on-board off-board and remote mounting

bull Pulse Counter Interface

bull Current modulation can operate up to 2 meters

bull High accuracy

bull plusmn05degC at -20degC to +90degC (max error)

bull plusmn062degC at 90degC to +150degC (max error)

bull plusmn07degC at -50degC to -20degC (max error)

bull Voltage supply 20V to 55V

bull 2-pin package options

bull 17mm x 25mm SMD (in development)

bull 4mm x 315mm TO-92s

bull Automotive AEC-Q100 Available (TO-92s)

Features Benefits

Tools amp Resources

bull Whitegoods

bull Servers

bull Medical Devices

bull Automotive

bull Building Automation

bull Wired Probes

Applications

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 51: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

51

TMP107 2-Pin digital pulse-train output temperature sensor with 05degC accuracy

bull Connects to any standard half-duplex UART

bull Low wire count

bull Daisy Chain greatly simplifies installation of multiple sensors

bull Single Orderable

bull Built in Non-volatile memory

bull Simplify thermal profiling

bull TIrsquos SMAARTWiretrade Interface

bull Robust single-wire daisy chain interface with Alert

bull Up to 32 devices on the chain

bull Self-addressing

bull Long distance between nodes (gt 300m)

bull High accuracy

bull plusmn04degC max -20degC - 70degC

bull plusmn055degC max -40degC - 100degC

bull plusmn07degC max -55degC - 125degC

bull Supply Range 17V ndash 55V

bull Nonvolatile Scratchpad Memory

bull TMP107ndashQ1 AEC-Q100 Grade 1

Features Benefits

Tools amp Resources

bull Refrigeration

bull Grain Silo

bull Enterprise

bull Asset Tracking Cold Chain

bull Building Automation

bull Wired Probes

Applications

bull Device Datasheets

‒ TMP107

bull EVM

‒ TMP107EVM

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 52: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

Accura

cy amp

Featu

res TMP112

Local = 05oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP75ABC Local = 2oC Max

Iq 20uA (Max on TMP75B)

Alert

TMP102 Local = 3oC Max

Iq 10uA (Max)

Alert

SOT-563

TMP122 124 Local = 15oC Max

Alert

Iq 75uA (Max)

SOT-23 SO-8

TMP275 Local = 05oC Max

Iq 85uA (Max)

Alert

TMP100101 Local = 3oC Max

Iq 75uA (Max)

Alert

SOT-23

TMP175 Local = 15oC Max

w27 addresses

Iq 85uA (Max)

Alert

TMP103 Local = 3oC Max

Iq 3uA (Max)

Multiple Address oprtions

WCSP 076 x 076mm

TMP104 Local = 3oC Max

Multiple Device Access

1-Wire Daisy Chain

Alert

WCSP 076 x 076mm

I2CSMBUS UART Pulse Count SPI

LM75A

LM7171-DIE Local = 3oC Max 175degC range

Alert

Iq 553uA (Max)

Bare Die Option

LM95071 Local = 1oC Max

13ndashb +sign

Iq 520 uA (Max) 280 (typ)

SOT-23

LMT01

Local = 05oC Max

Pulse Count Output

Up to 2 meters

2-pin DFN TO-92S

Digital local temp sensors New

Existing

Roadmap Q100 Option

Available Q100 in

Development

TMP107

Local = 04oC Max

UART Daisy Chain Topology

Up to 300 meters

Alerts

EEPROM

TMP108 Local = 075oC Max

Alert

Iq 10uA (Max)

WCSP 12 x 08mm

TMP116

Local = 02oC Max

Alert

SOT-563

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 53: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

53

Accura

cy amp

Featu

res

LM94022 Local = 15oC Max

-50degC to +150degC

15V-55V Iq 54uA

Quad Gain Class AB

Output SC70

LM94023 Local = 15oC Max

-50degC to +150degC

Dual Gain Class AB Output

15V-55V Iq 54uA

microSMD

LM94021

Local = 2oC Max

-50degC to +150degC

Quad Gain Class A Output

15V-55V Iq 9uA

UL Rated AEQ100 Grade 0

SC70 TMP20

Local= 25oC Max

Class AB Output

Gain= -1177mVdegC

18V-55V Iq 4uA (Max)

SOT-563 SC70

Temperature Range

LM20 Local = 15degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

microSMD (1mmx1mm) SC70

LM35(lsquoC)LM34(lsquoF)

Local = 05oC Max

-55degC to +150degC

Gain=10mVdegC Class A Output

4V-30V Iq 90uA

TO46 TO220 TO92 SO8

LM50 Local = 2oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LM60 Local = 3oC Max

Gain=625mVdegC

27V to 10V Iq 82uA

SOT23-3 TO92-3 LMT84

15V-55V

-55mVrsquoC

LMT89 Local = 25degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 4oC Max

Gain=97mVdegC

45V to 10V Iq 130uA

SOT23-3

LMT88 Local = 5degC Max

Class A Output

Gain=-1177mVdegC

24V-55V Iq 9uA

SC70

Local = 27oC Max

-50degC to +150degC Iq 54uA

Class AB Output SC70

LMT90

LMT85

18V-55V

-82mVrsquoC

LMT86

22V-55V

-109mVrsquoC

LMT87

27V-55V

-136mVrsquoC

Shunt Output

LM335LM335A

Local = 6oC 3oC Max

Shunt Output

TO46 TO92 SO8

LM235LM235A

Local = 3oC 1oC Max

Shunt Output

TO46

LM135LM135A

Local = 3oC 1oC Max

-55degC to +150degC

Shunt Output

TO46

New

Existing

Roadmap

Q100 Option

Available

Analog local temperature sensors

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 54: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

54

How to start temperature sensing --- TI design

TIDA-00374

TIDA-00752 TIDA-00824

TIDA-00517

TIDA-00800

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 55: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

55

bull Daisy-chained temperature sensors (TMP107)

bull Bluetooth Low Energytrade link from SensorTag platform

bull SMAART WIREtrade Interface Allows up To 32 Daisy-Chained devices

using UART interface

bull Temperature range -55degC to +125degC

bull Accuracy plusmn04degC from -20degC to +70degC

bull Resolution 14 bits (0015625degC)

The TIDA-00800 reference design entails 4 temperature sensors along a daisy

chain in a cabling environment The sensors connect to the SensorTag

development platform via the UART interface where the information can be

transmitted wirelessly The Bluetooth low energy wireless technology makes

testing and demonstration easier due to its integration in most modern

equipment The form factor and electrical connections are compatible with TI

SensorTag 20 ecosystem allowing easy prototyping with other wireless

technology (Zigbee Wifi sub 1GHzhellip) while the selected sensor allows industrial

grade accuracy and resolution

Temp Sensing

bull Device

bull TMP107

bull Functionality

bull Measurement

Features Description

TIDA-00800 Daisy chain temperature sensor reference design for SensorTag

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 56: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

56

bull How to use the LMT70 temperature sensor to measure human skin

temperature

bull Ideal signal path components to achieve high thermal accuracy

bull Layout considerations for routing thermal paths

bull Mechanical case example for ideal mounting considerations

TIDA-00824 features the LMT70 analog temperature sensor for measuring

human skin temperature This TI design features how to mechanically

mount the temperature sensor for best thermal conductivity Signal path

considerations on how to achieve greater than 01degC accuracy is also

discussed in this TI design

Temp Sensing

bull Device

bull LMT70

bull Functionality

bull Measurement

Features Description

TIDA-00824 Human skin temperature sensing for wearable applications reference design

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 57: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

57

bull TIDA-00752 Tools Folder

bull Design Guide

bull Device Datasheets bull LMT01

bull SN6505B

bull MSP430F5528

2-wire galvanic ally isolated IC temperature sensor with pulse count interface

Accuracy Over Temperature

Measured Error using LUT lt 025degC (-35degC to 150degC)

Measured Error using Transfer Function lt025degC (15degC to

100degC)

Functional Isolation of 400 VRMS and Dielectric up to 2500-V AC

for 60 seconds

Pre-Compliance Testing Meets IEC61000-4-4 EFT (Level 4) plusmn2

kV ndash Class-A

Power and Data Coexist on 2-Wire Interface for Remote

Temperature Sensing Across Isolation

Replacement for RTDs and NTC or PTC Thermistors

No Need of System Level Calibration Unlike Thermistors

Eliminates High-Precision Active or Passive Components

Single Low-Profile Transformer for Power and Data Isolation

Solution Features Solution Benefits

Applications

TI Designs Number TIDA-00752

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 58: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

58

On-line resource

On-line forum httpwwwdeyisupportcom

Sensor Product httpwwwticomcnlsdsti_zhsensing-productssensing-products-

overviewpage

TI-Designs httpwwwticomcngeneralcndocsrefdesignsearchresultstsp

WEBENCHreg httpwwwticomcnlsdsti_zhanalogwebenchoverviewpage

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 59: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

Thanks

59

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 60: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

60

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated

Page 61: TI s sensing technology for smart home appliance ... · PDF file7 Inductive sensing ... • Industrial/white goods: refrigerator, range hoods, dishwashers, washing machines, ... Classical

IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES

Texas Instruments Incorporated (lsquoTIrdquo) technical application or other design advice services or information including but not limited toreference designs and materials relating to evaluation modules (collectively ldquoTI Resourcesrdquo) are intended to assist designers who aredeveloping applications that incorporate TI products by downloading accessing or using any particular TI Resource in any way you(individually or if you are acting on behalf of a company your company) agree to use it solely for this purpose and subject to the terms ofthis NoticeTIrsquos provision of TI Resources does not expand or otherwise alter TIrsquos applicable published warranties or warranty disclaimers for TIproducts and no additional obligations or liabilities arise from TI providing such TI Resources TI reserves the right to make correctionsenhancements improvements and other changes to its TI ResourcesYou understand and agree that you remain responsible for using your independent analysis evaluation and judgment in designing yourapplications and that you have full and exclusive responsibility to assure the safety of your applications and compliance of your applications(and of all TI products used in or for your applications) with all applicable regulations laws and other applicable requirements Yourepresent that with respect to your applications you have all the necessary expertise to create and implement safeguards that (1)anticipate dangerous consequences of failures (2) monitor failures and their consequences and (3) lessen the likelihood of failures thatmight cause harm and take appropriate actions You agree that prior to using or distributing any applications that include TI products youwill thoroughly test such applications and the functionality of such TI products as used in such applications TI has not conducted anytesting other than that specifically described in the published documentation for a particular TI ResourceYou are authorized to use copy and modify any individual TI Resource only in connection with the development of applications that includethe TI product(s) identified in such TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TOANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTYRIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right orother intellectual property right relating to any combination machine or process in which TI products or services are used Informationregarding or referencing third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof Use of TI Resources may require a license from a third party under the patents or other intellectual property of thethird party or a license from TI under the patents or other intellectual property of TITI RESOURCES ARE PROVIDED ldquoAS ISrdquo AND WITH ALL FAULTS TI DISCLAIMS ALL OTHER WARRANTIES ORREPRESENTATIONS EXPRESS OR IMPLIED REGARDING TI RESOURCES OR USE THEREOF INCLUDING BUT NOT LIMITED TOACCURACY OR COMPLETENESS TITLE ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OFMERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUALPROPERTY RIGHTSTI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY YOU AGAINST ANY CLAIM INCLUDING BUT NOTLIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IFDESCRIBED IN TI RESOURCES OR OTHERWISE IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL DIRECT SPECIALCOLLATERAL INDIRECT PUNITIVE INCIDENTAL CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH ORARISING OUT OF TI RESOURCES OR USE THEREOF AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGESYou agree to fully indemnify TI and its representatives against any damages costs losses andor liabilities arising out of your non-compliance with the terms and provisions of this NoticeThis Notice applies to TI Resources Additional terms apply to the use and purchase of certain types of materials TI products and servicesThese include without limitation TIrsquos standard terms for semiconductor products httpwwwticomscdocsstdtermshtm) evaluationmodules and samples (httpwwwticomscdocssamptermshtm)

Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265Copyright copy 2017 Texas Instruments Incorporated