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3rd floor, SeogAm Bld. 1082-12, PoongDuckChun-Dong, SuJi-Gu, YongIn-Shi, KyungGi-Do 449-172, Korea(Tel)+82-31-266-3082, (Fax)+82-31-266-3083
www.atlab.co.kr
Digital Contact Controller
ApplicationsApplications
DCC
Portable Electronics (MP3, Mobile Phone, PMP, PDA, Camera)
Home Electronics (TV, DVD, Air conditioner, Refrigerator, Micro oven, LCD, Door Lock, AV)
Office & Others (Fax, Copy
Machine, ATM, Control Panel)
Contents
Contents
Contents
The Principle of Capacitive TouchThe Principle of Capacitive Touch
• Allow design flexibility: – Free from pad size, pad location, cover thickness, PCB variation– Capable of on-board, not on additional board
• Result in same sensitivity all the time
DACTouch ε=
ATA2508PCB
Insulator (Set cover)Touch PAD (Copper)
Ctouch: The capacitance induced between finger and touch pad when touched.ε : the constant value of permittivity (Air=1,Glass= 10, Acryl=5~10, Rubber=2~3)D : The thickness of Set CoverA : The size of Touch Pad
The Operating Principle of DCCThe Operating Principle of DCC
The Operating Principle of DCCThe Operating Principle of DCC
Sampling Clock
R
R
C
C
ref
sen
Csen
Reference
Sensing
Sampling Clock
ref
sen
tdiff
Sensor generates time delay
Sensing delay is compared with a reference delay
Delay difference is measured by “ Time Converter ”
ATA2508ATA2508 FeaturesFeatures
Patented Patented fully digital architecturefully digital architectureTwelve channels Twelve channels (40QFN)(40QFN) or nine channels or nine channels (32QFN,24SSOP)(32QFN,24SSOP) availableavailableProgrammable registers to characterize applicationsProgrammable registers to characterize applicationsII22C C for the host interfacefor the host interfaceDifferent sensitivity assignment to each channel for design fleDifferent sensitivity assignment to each channel for design flexibilityxibilityConfigurable Configurable AICAIC™™ (Automatic Impedance Calibration)(Automatic Impedance Calibration)
Two kinds of interrupts Two kinds of interrupts (GINT for general purpose, TINT for touch detection)(GINT for general purpose, TINT for touch detection)
Eight bit resolution of touch Eight bit resolution of touch strength datastrength data (256 step)(256 step)APISAPISTMTM: Mode1, Mode2, Mode3 : Mode1, Mode2, Mode3 (Adjacent Pattern Interference Suppression)(Adjacent Pattern Interference Suppression)
Configurable twelve DIO pins Configurable twelve DIO pins as direct touch outputs, extended as direct touch outputs, extended GPIOsGPIOs, or external interrupt inputs, or external interrupt inputs
Beep generation for tactile feelingBeep generation for tactile feelingIdle and Sleep modes for power savingIdle and Sleep modes for power savingDeDe--bounced touch outputsbounced touch outputs
Strong Point Strong Point
1. Consumption Current : 1/10 times comparing to competitors1. Consumption Current : 1/10 times comparing to competitors-- Because of not using analog technology, circuit architecture isBecause of not using analog technology, circuit architecture is very simple.very simple.
2. Response Time2. Response Time 25 times comparing to competitors25 times comparing to competitors-- Because it dose nor need not complex signal processing, can raiBecause it dose nor need not complex signal processing, can raise the data sampling rate.se the data sampling rate.
0.1
1
10
0 1 2 3 4 5 6
Conversion Frequency [KHz]
Current [mA]
ATLab
CQ x 25 Faster Speed
x 10 Less Power
S
Consumption Current Consumption Current Response Time Response Time
Differential vs. SingleDifferential vs. Single--EndEnd
Sampling Clock
R
R
C
C
ref
sen
Csen
Reference
Sensing
Differential InputSingle-End Input
Sensor Input
Reference Input
Sensing Cap.
Sensor Input
Ctouch
Water proof Water proof
Single-End Differential
Water drop
Input GNDGND
Water drop
Input
Strong Point Strong Point
Strong Point Strong Point
RF Signal: 3Vp-p swept from 100MHz to 2.4 GHz, Korea MIC Condition
Cha
nge
of O
utpu
t
Frequency [GHz]
Touch Decision Level
RF Susceptibility TestRF Susceptibility Test
Strong Point Strong Point ESD LevelESD Level
HBM : 8KV (Input Sensor)
Set : 15KV
Analog Touch Sensor
Voltage
DCC
2KV
4KV
6KV
8KV
Strong Point Strong Point Development ToolDevelopment Tool
Tuning Kit provides you easy and quick design environment !
PC USB Interface Board Touch Board
USB I2C
1 2 3
4 5 6
7 8 9
* 0 #
Touch InterferenceArea
1 2 3
4 5 6
7 8 9
* 0 #
APIS Mode IOutput Data
Real Touch Output Touch Output by APIS I * 8 0 #
strength
1 2 3
4 5 6
7 8 9
* 0 #
Touch InterferenceArea
1 2 3
4 5 6
7 8 9
* 0 #
APIS Mode IIOutput Data
Real Touch Output Touch Output by APIS II * 8 0 #
strength
StrengthThreshold
1 2 3
4 5 6
7 8 9
* 0 #
Touch InterferenceArea
1 2 3
4 5 6
7 8 9
* 0 #
APIS Mode IIIOutput Data
Real Touch Output Touch Output by APIS III * 8 0 #
strength
FeatureFeature APIS modeAPIS mode
APIS mode 1APIS mode 1
APIS mode 2APIS mode 2
APIS mode 3APIS mode 3
Feature Feature Individually Adjustable Sensitivity
Zin
Zref
Sensitivity = b
Zin
Zref
Sensitivity =a
Feature Feature Configurable AICConfigurable AIC
DCC Tuning Viewer
Zin
Zref
Sensitivity =a
Zin
Zref
Sensitivity = b
Zin
Zref
Sensitivity =a
PCB, Temp, Humidity Variation
Keep sensitivity stable
Initial setup Sensitivity
Sensitivity changedby external environment
Recovered Sensitivity by AIC
• Individual sensitivity setting by registers• Pause/Resume AIC function by Host• Configure AIC interval
FeatureFeature General purpose DIOGeneral purpose DIO
I2C Supported
DIO
1
LED
GPI
OG
PIO
GPI
O
Inte
rrup
t
Inte
rrup
t
Inte
rrup
t
LE
D
LE
D
Inte
rrup
t
SIN0SIN1
SIN2SIN3
SIN4SIN5SIN6SIN7SIN8SIN9
SIN10
SIN11
REF_IN
DIO
1
DIO
2
DIO
3
DIO
4
DIO
0
DIO
5
DIO
9
DIO
8
DIO
7
DIO
6
DIO
11
DIO
10
DATACLK
Inte
rrup
t
FeatureFeature Strength OutputStrength Output
GND Pad
Insulator
Touch Input
d
Pressure = 1 / d
Touch Output
[255:0]
Accelerator using touch strength output function.
Patent StatusPatent Status
%Navigation Algorithm
%Circuit
%Set
4
35
53
%Device
%Layout
Road Map Road Map
2007 2008 21063
• n-ch
• n-ch
Customized
• n-ch
DPI14Parallel Sampling, I2C, AIC 14b
ATA2509
DPI14Parallel Sampling, I2C, AIC 14b
ATA2509
Customized
• n-ch
DMI14Multiplexed Sampling, I2C, AIC 14b
ATA25XX
DMI14Multiplexed Sampling, I2C, AIC 14b
ATA25XX
DPD7Parallel Sampling, Daisy-ch, AIC 7b
ATA25XX
DPD7Parallel Sampling, Daisy-ch, AIC 7b
ATA25XX
Customized
• OTP Memory• Peripheral
11
SmartSensorParallel Sampling, SIF, AIC 7b
ATA2501 + 8b MCU
Customized
DPS7Delay, Parallel Sampling, SIF, AIC 7b
ATA2501
Customized
DPI7Parallel Sampling, I2C, AIC 7b
ATA2508
DPI7Parallel Sampling, I2C, AIC 7b
ATA2508
11
Shared PartnersShared Partners
ELECTRONICS
@@Lab
ELECTRO-MECHANICS
