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Ver 1.4 21/10/13 A-1 ES168/ES169 LCR meter chipset Features 19,999 counts LCD display LQFP-48L package for ES168 LQFP-80L package for ES169 Auto identification check and measurement Series/Parallel modes are selectable R/L/C with D/Q/ parameters Support DCR mode 20.000~20.00M 32 different test frequencies are available: 100-250k Hz Test ac signal level: 1.0/0.5/0.25VRMS typ. 5 range resistor range used Test range: (ex. F=1kHz) L: 20.000 H ~ 2.0000 kH C: 200.00 pF ~ 2.000 mF R: 20.000 ~ 20.00M Multi-level battery voltage detector Support Backlight & Buzzer sound driver Source resistance depends on range Typical: 120 Support UART access. Open/Short calibration for AC impedance measurement is allowed: Open condition requirement: Impedance is necessary to be larger than 9.5M @ 1kHz Short condition requirement: Impedance is necessary to be less than 1.1 Application Handheld LCR bridge meter Description The chipset of ES169/ES168 is suitable for LCR bridge application. By using ES169/ES168 to implement the LCR bridge meter, the complicated PCB design is not necessary. The ES168 is the analog frond end chip with resistor switches network to provide different ranges control. It also provides a high-performance integrated circuit by the signal with different frequency to measure the complex impedance of the DUT (device under test). The ES169 is the mix-mode processing chip to handle the calculation of the D/Q/ parameter with R/L/C values. It also provides the user interface and LCD drivers to support dual display operation. Tolerance function, limit function, hold function, Max/Min. function and relative function are including in the dual display operation. A multiple-level battery detection and auto power-off scheme are built-in to help the improvement of battery life. The high performance of 4 1/2 digits ADC circuit design is implemented in the ES169/ES168 chipset. A fully smart measurement for L/C/R is possible. User could measure the DUT impedance simply without change function key at the AI mode.

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Page 1: LCR meter chipset

Ver 1.4 21/10/13 A-1

ES168/ES169

LCR meter chipset

Features

• 19,999 counts LCD display

• LQFP-48L package for ES168

• LQFP-80L package for ES169

• Auto identification check and measurement

• Series/Parallel modes are selectable

• R/L/C with D/Q/ parameters

• Support DCR mode 20.000~20.00M

• 32 different test frequencies are available:

100-250k Hz

• Test ac signal level: 1.0/0.5/0.25VRMS typ.

• 5 range resistor range used

• Test range: (ex. F=1kHz)

L: 20.000 H ~ 2.0000 kH

C: 200.00 pF ~ 2.000 mF

R: 20.000 ~ 20.00M

• Multi-level battery voltage detector

• Support Backlight & Buzzer sound driver

• Source resistance depends on range

Typical: 120

• Support UART access.

• Open/Short calibration for AC impedance

measurement is allowed:

Open condition requirement: Impedance is

necessary to be larger than 9.5M @ 1kHz

Short condition requirement: Impedance is

necessary to be less than 1.1

Application

Handheld LCR bridge meter

Description

The chipset of ES169/ES168 is suitable for

LCR bridge application. By using

ES169/ES168 to implement the LCR bridge

meter, the complicated PCB design is not

necessary. The ES168 is the analog frond end

chip with resistor switches network to provide

different ranges control. It also provides a

high-performance integrated circuit by the

signal with different frequency to measure the

complex impedance of the DUT (device

under test). The ES169 is the mix-mode

processing chip to handle the calculation of

the D/Q/ parameter with R/L/C values. It

also provides the user interface and LCD

drivers to support dual display operation.

Tolerance function, limit function, hold

function, Max/Min. function and relative

function are including in the dual display

operation. A multiple-level battery detection

and auto power-off scheme are built-in to help

the improvement of battery life. The high

performance of 4 1/2 digits ADC circuit

design is implemented in the ES169/ES168

chipset. A fully smart measurement for L/C/R

is possible. User could measure the DUT

impedance simply without change function

key at the AI mode.

Page 2: LCR meter chipset

Ver 1.4 21/10/13 2

Content

Features .................................................................................................................... 1

Description ............................................................................................................... 1

Pin Assignment ........................................................................................................ 4

Pin Description ......................................................................................................... 4

Absolute Maximum Ratings .................................................................................... 7

Impedance Measurement ......................................................................................... 9

Introduction ...................................................................................................... 9

Measurement mode ........................................................................................ 10

Open/short calibration ..................................................................................... 11

Equivalent circuit ........................................................................................... 12

KEYPADS Configuration ...................................................................................... 13

OPERATION KEYPAD ........................................................................................ 14

1. Power ON/OFF ...................................................................................... 14

2. Auto Power Off ...................................................................................... 14

3. Backlight driver ..................................................................................... 15

4. Battery detection .................................................................................... 15

5. LCD test ................................................................................................. 15

6. Manual range/ auto range ....................................................................... 15

7. Hold ........................................................................................................ 15

8. Maximum, Minimum and Average ........................................................ 15

9. Sorting by tolerance mode ..................................................................... 16

10. Sorting by limit function ................................................................ 16

11. Relative function ............................................................................ 17

12. Auto identification function ........................................................... 17

13. Dissipation factor/ quality factor/ phase angle (D/Q/θ) ................. 18

14. Resistance, inductance, capacitance, and impedance measurement

18

15. Parallel/Series circuit mode (P/S) .................................................. 18

16. DC bias ........................................................................................... 18

17. Test signal amplitude ..................................................................... 19

18. Conversion rate ........................................... 錯誤! 尚未定義書籤。

19. ESR measurement .......................................................................... 19

20. DCR measurement ......................................................................... 19

21. Test frequency select ...................................................................... 20

Page 3: LCR meter chipset

Ver 1.4 21/10/13 3

22. Calibration function ....................................................................... 24

23. Power-on setup (PON setup) .......................................................... 24

Accuracy (Ae) vs. Impedance (ZDUT) .................................................................... 27

LCD Truth table ..................................................................................................... 29

UART Interface ...................................................................................................... 32

Application circuit ................................................................................................. 34

Package information (LQFP-48 7x7) ..................................................................... 37

Package information (LQFP-80) ............................................................................ 38

Page 4: LCR meter chipset

Ver 1.4 21/10/13 4

Pin Assignment

DT

H40

GN

DA

39

VS

RC

38

GN

DA

41

DT

L42

GN

DA

43

SW

144

SW

245

SW

346

SW

447

SW

548

CA2+1

CA2-2

RINT23

CINT2-4

CINT2+5

GNDA6

VR7

VRH8

VDDA9

VDDA10

OSC112

NC11

BU

ZO

UT

15

DA

TA

NE

W16

UB

17

CE

B18

SC

L19

SD

A20

IOC

TR

L21

VC

C22

GN

DD

23

VD

DD

14

OS

C2

13

NC26

NC35

VSSD25

VSSA27

VSSA28

RB29

TEST130

GNDA31

CINT1+32

CINT1-33

RINT134

CA1-36

CA

1+

37

GN

DD

24

U5

ES168

SEG311

SEG302

ICPDA3

ICPCK4

SEG295

SEG286

SEG277

SEG268

SEG259

SEG2410

SEG2311

SEG2212

SEG2113

SEG2014

SEG1915

SEG1816

SEG1717

SEG1618

SEG1519

SEG1420

SE

G13

21

SE

G12

22

SE

G11

23

SE

G10

24

SE

G9

25

VD

D26

VS

S27

SE

G8

28

SE

G7

29

SE

G6

30

SE

G5

31

BL

32

SE

G4

33

SE

G3

34

SE

G2

35

SE

G1

36

CO

M4

37

CO

M3

38

CO

M2

39

CO

M1

40

DRDY41

UB42

SCL43

SDA44

C245

C146

V247

V148

VMAX49

PLCD50

KEYOUT351

KEYOUT252

KEYOUT153

KEYOUT054

KEYIN255

KEYIN156

KEYIN057

NC58

NC59

APO_DIS60

AV

DD

61

PW

R62

PW

R_

KE

Y63

AV

SS

64

LB

AT

65

NC

66

NC

67

NC

68

SE

G37

69

SE

G36

70

RX

71

TX

72

SE

G35

73

NC

74

/RE

S75

VD

D76

VS

S77

SE

G34

78

SE

G33

79

SE

G32

80

ES169

Page 5: LCR meter chipset

Ver 1.4 21/10/13 5

Pin Description

ES169 Pin No Symbol Type Description

1-2 SEG31-SEG30 O LCD segment31-30 output

3 ICPDA I/O Data port for In-Circuit Programming

4 ICPCK I Clock port for In-Circuit Programming

5-25 SEG29-SEG9 O LCD segment29-9 output

26 VDD P Positive power supply, 3V

27 VSS P Negative power supply, ground

28-31 SEG8-SEG5 O LCD segment8-5 output

32 BL O Backlight driver output.

33-36 SEG4-SEG1 O LCD segment4-1

37-40 COM4-COM1 O LCD common output

41 DRDY I Data ready detection input

42 UB I Unbalance detection input

43 SCL O Serial bus clock

44 SDA I/O Serial bus data 45 C2 - LCD voltage pump 46 C1 - LCD voltage pump

47 V2 P LCD voltage pump

48 V1 P LCD voltage pump

49 VMAX P IC maximum voltage

50 PLCD P LCD power supply

51-54 KEYOUT3-

KEYOUT0

O Keypad output

55-57 KEYIN2-

KEYIN0

I Keypad input

58-59 NC - Not connected

60 APO DIS I Auto power disable detection input (Active high)

61 AVDD P Analog positive power supply, 3V

62 PWR O Power control output

63 PWR_KEY I Power keypad sense input 64 AVSS P Analog negative power supply, ground 65 LBAT I Battery voltage detection input

66-68 NC - Not connected

69-70 SEG37-SEG36 O LCD segment37-36 output

71 RX I Receive for UART input

72 TX O Transmit for UART output

73 SEG35 O LCD segment35 output

74 NC - Not connected

75 RES I External reset input

76 VDD P Positive power supply, 3V

77 VSS P Negative power supply, ground

78-80 SEG34-32 O LCD segment35-33 output

Page 6: LCR meter chipset

Ver 1.4 21/10/13 6

ES168 Pin No Symbol Type Description

1 CA2+ - External capacitor connection for AC filter

2 CA2- - External capacitor connection for AC filter 3 RINT2 - Integrator resistor connection 4 CINT2- - Integrator capacitor connection 5 CINT2+ - Integrator capacitor connection 6 GNDA P Analog power ground 7 VR I Reference voltage input (-1.0V typical)

8 VRH O Bandgap voltage output (-1.23V typical)

9 VDDA P Analog positive power supply

10 VDDA P Analog positive power supply

11 NC - Not connected

12 OSC1 O Oscillator input

13 OSC2 I Oscillator output

14 VDDD P Digital positive power supply

15 BUZOUT O Buzzer driver output

16 DRDY O Data ready output

17 UB O Unbalance output 18 CEB I Chip enable input (Active @VSSD) 19 SCL I Serial bus clock 20 SDA I/O Serial bus data 21 IOCTL - MCU level shift

22 VCC P MCU power supply

23 GNDD P Digital power ground

24 GNDD P Digital power ground

25 VSSD P Digital negative power supply

26 NC - Not connected

27 VSSA P Analog negative power supply

28 VSSA P Analog negative power supply

29 NC - Not connected

30 NC - Not connected

31 GNDA P Analog power ground

32 CINT1+ - Integration capacitor connection

33 CINT1- - Integration capacitor connection

34 RINT1 - Integration resistor connection

35 NC - Not connected

36 CA1- - External capacitor connection for AC filter

37 CA1+ - External capacitor connection for AC filter

38 VSRC O Source terminal for DUT

39 GNDA P Analog power ground

40 DTH I High sensed terminal for DUT

41 GNDA P Analog power ground

42 DTL I Low sensed terminal for DUT

43 GNDA P Analog power ground

44 SW1 O Range ratio resistor1 (100Ω) 45 SW2 O Range ratio resistor2 (1kΩ) 46 SW3 O Range ratio resistor3 (10kΩ) 47 SW4 O Range ratio resistor4 (100kΩ) 48 SW5 O Range ratio resistor5 (1MΩ)

Page 7: LCR meter chipset

Ver 1.4 21/10/13 7

Absolute Maximum Ratings

Characteristic Rating

Supply Voltage (VDD to VSS) 5V

Digital Input for ES168 VSSD -0.6 to GNDD + 0.6V

Digital Input for ES169 VSS -0.6 to VDD +0.6V

Power Dissipation. Flat Package 500mW

Operating Temperature -20℃ to 70℃

Storage Temperature -50℃ to 125℃

Electrical Characteristics

Table 1 Electrical characteristics

Parameter Symbol Test Condition Min. Typ. Max Units

3V Power supply

VDDD

VDDA

AVDD

VDD

— 3 — V

±3V Supply current

VDDD/VDDA =3V

VSSD/VSSA = -3V

AVDDD/VDD = 3V

IDD Open — 15 17 mA

DCR test signal level VDUT Open/Short — 11/0.981 — V

Testing signal amplitude (AC mode) VDUT Open — 1/0.5/0.25 — VRMS

Accuracy of testing signal amplitude

(AC mode) Ae Open — — ±9 %

Accuracy of testing signal frequency Ae 100-250kHz, Open — — ±0.12 %

Basic accuracy (F < 10kHz)

See Table 14 for details Ae 10-100k range — — ±0.2 %F.S2,3

Source Current (DC) VSRC VDDA = 3V,

VSSA = -3V, — 9.7 mA

Accuracy of DC bias level Ae 1 — — ±0.43 %

Temperature coefficient for basic

accuracy (Ae)

Tc -20℃<TA<70℃

ratio resistor=0ppm — — 100 ppm/℃

Band-gap reference voltage VBG

100KΩ resistor

between VRH and

VRL

-1.30 -1.22 -1.14 V

Peak-to-peak LCD drive voltage VCOM

VSEG — 3.0 — V

Multi-level low battery detector

Vt1

VREF=3V

VPOWER_SENSE

— 2.599 — V

Vt2 — 2.453 — V

Vt3 — 2.307 — V

Vt4 — 2.160 — V

1 Adjusting the VR to get a 1V DC output. 2 Full scale: 20000 counts 3 For best integral linearity of ADC, the metalized polypropylene film capacitor for CINT is necessary.

Page 8: LCR meter chipset

Ver 1.4 21/10/13 8

LCD bias voltage configuration

1/4 duty

1/3 bias

A-type waveform

Reference voltage input VREF VR-VRL -1010 -1000 -990 mV

TA=25℃

Page 9: LCR meter chipset

Ver 1.4 21/10/13 9

Impedance Measurement

Introduction

The ES169/ES168 chipset is a total solution for high accuracy LCR meter which

could measure Inductance/Capacitance/Resistance with secondary parameters including

dissipation factor(D), quality factor(Q), phase angle(), equivalent series/parallel

resistance(ESR or Rp). The chipset is fully auto ranging operation for AC impedance &

DC resistance measurement. Because of high integrated circuit design, a smart

measurement for L/C/R is possible (AI mode). It means the user could measure the

L/C/R components directly at AI smart mode without changing the function key. User

could also select the target test frequencies of 100Hz/120Hz/1kHz/10kHz/100kHz

depending on DUT type. Components could be measured in series or parallel mode

according to the DUT impedance automatically.

The LCR chipset built-in a 4.5 digits ADC operates at 1.2/s updating rate nominally

for L/C/R mode. The chipset operates at 0.5/s updating rate for DCR mode.

The general DMM could measure DC resistance only, but the LCR meter could

measure DC resistance and AC impedance. The impedance consists of resistance (real

part) and reactance (imaginary part). For example, Zs represents the impedance in series

mode. Zs can be defined a combination of resistance Rs and reactance Xs. It also could

be defined as a |Z| of magnitude with a phase angle .

Zs = Rs + jXs

| Zs |

Real axis

Imaginary axis (series mode)

Rs

Xs

Zs1 = Rs1 + jXs1Xs1

Rs11

> 0

< 0

Zs = Rs + jXs

| Zs |

Real axis

Imaginary axis (series mode)

Rs

Xs

Zs1 = Rs1 + jXs1Xs1

Rs11

> 0

< 0

Zs = Rs + jXs or |Zs|∠

Page 10: LCR meter chipset

Ver 1.4 21/10/13 10

|Z| = 22 XsRs +

Rs = |Zs| cos

Xs = |Zs| sin

Xs/Rs = tan

= tan-1(Xs/Rs)

If > 0, the reactance is inductive. In other words, if < 0, the reactance is capacitive.

There are two types for reactance. The one is the inductive reactance XL and the

other is the capacitive reactance XC. They could be defined as: (f = signal frequency)

XL = 2πf L (L = Inductance)

XC = C 2

1

f (C = Capacitance)

Measurement mode

The impedance could be measured in series or parallel mode. The impedance Z in

parallel mode could be represented as reciprocal of admittance Y. The admittance could

be defined as Y = G + jB. The G is the conductance and the B is the susceptance.

Rs: Resistance in series mode Rp: Resistance in parallel mode

Xs: Reactance in series mode Xp: Reactance in parallel mode

Cs: Capacitance in series mode Cp: Capacitance in parallel mode

Ls: Inductance in series mode Lp: Inductance in parallel mode

There are two factors to provide the ratio of real part and imaginary part. Usually

the quality factor Q is used for inductance measurement and the dissipation factor D is

used for capacitance measurement. D factor is defined as a reciprocal of Q factor.

Q = 1 / D = tan

Q = Xs / Rs = 2πf Ls / Rs = 1 / 2πf Cs Rs

Q = B / G = Rp / | Xp | = Rp / 2πf Lp = 2πf Cp Rp

Page 11: LCR meter chipset

Ver 1.4 21/10/13 11

Actually, Rs and Rp are existed in the equivalent circuit of capacitor or inductor. If

the capacitor is small, Rp is more important than Rs. If capacitor is large, the Rs is more

important also. Therefore, use parallel mode to measure lower value capacitor and use

series mode to measure higher value capacitor. For inductor, the impedance relationship

is different from capacitor. If the inductor is small, Rp is almost no effect. If inductor is

large, the Rs is no effect also. Therefore, use series mode to measure lower value

inductor and use parallel mode to measure higher value inductor.

Open/short calibration

The ES169/ES168 chipset provides the open/short calibration process to get the better

accuracy for high/low impedance measurement. The purpose of open/short calibration

is to reduce the parasitic effect of the test fixture.

ZM is defined as total impedance measured to DUT by the special test fixture which

has some parasitic impedance. ZM = (Rs + jLs) + (CojGo +

1 || ZDUT)

ZOUT is the target impedance user wants to realize. It is necessary to use the

open/short calibration process to cancel the effect of Rs + jLs and Go+jCo.

Rs Ls

Co Go ZDUTZM

Rs Ls

Co Go ZDUTZM

Page 12: LCR meter chipset

Ver 1.4 21/10/13 12

Equivalent circuit

ZSHORT

YOPEN ZDUTZMZM – ZSHORT

ZDUT =

1-(ZM-ZSHORT)YOPEN

ZSHORT

YOPEN ZDUTZMZM – ZSHORT

ZDUT =

1-(ZM-ZSHORT)YOPEN

Rs Ls

Co Go OPENYOPEN

If Rs+jLs << 1/(Go + jCo)

YOPEN = Go + jCo

Rs Ls

Co Go OPENYOPEN

If Rs+jLs << 1/(Go + jCo)

YOPEN = Go + jCo

Rs Ls

Co Go SHORTZSHORT

ZSHORT = Rs + jLs

Rs Ls

Co Go SHORTZSHORT

ZSHORT = Rs + jLs

Page 13: LCR meter chipset

Ver 1.4 21/10/13 13

KEYPADS Configuration

KEYIN0 KEYIN1 KEYIN2

KEYOUT0 Ai/Setup Freq Up/ESR

↑ HOLD/MMA .

KEYOUT1 DQθ/Limit

Freq Down/DCR

Range/Auto

KEYOUT2 ZLCR/PAL_SER TOL%/BKLIT REL/CAL

Table 2. Push key function description

Keypads < 1 second > 1 second

AI/

SETUP Enable/disable the auto identification mode. Enter/exit setup menu.

Freq Up /

ESR

Select a test frequency.

See table 11.

Select a limit set in limit function.

Enable/disable the ESR (equivalent series

resistance) mode.

HOLD/

MMA .

Enter/re-enter hold function.

Selects Max., Min., Avg., and present reading in

MMA function.

Store parameters in setup mode.

Exit hold function.

Enable/disable MMA function.

DQθ/

Limit

Switches between D, Q, and θ.

Switches the upper/lower limit in limit function.

Enable/disable limit function.

Freq Down/

DCR

Selects a test frequency.

See table 11.

Selects a limit set in limit function.

Enable/disable DCR mode.

Range/

Auto

Disable auto range and sets a manual range.

Switches the upper/lower limit in limit function.

Enables auto range

ZLRC/

PAL_SER

Switches between R, L, C, and Z.

Cancel parameters changes or return to the

measure mode in setup mode.

Toggles between parallel and series circuit

mode.

Enter POR setup menu during initialization, see

to Power ON/OFF.

TOL%/

BKLIT Enable the tolerance function or select a

tolerance value.4

Enable/disable backlight.

REL/

CAL Enable/disable relative function. Enter/exit the user open/short calibration mode.

4 Each key, excluding the Tol%/BKLIT key, can exit the tolerance mode.

Page 14: LCR meter chipset

Ver 1.4 21/10/13 14

OPERATION KEYPAD

1. Power ON/OFF

Power ON:

The system will power on when press POWER key. after power-up, the ES169

drives the PWR pin to high to keep the system powered.

The LCR powers up in the auto identification mode when first time turned on.

User can change the power-on measurement mode by changing internal

parameters in POR setup mode. See Power-on setup (PON setup).

Power OFF:

The ES169 senses the POWER key. it drives the PWR pin low level to turn off the

system power when press POWER key.

2. Auto Power Off

ES169 automatically drives the PWR pin to low to turn off the system after 5

minutes (default) if no keys are pressed. Pressing any key will reset the timer

counter and keep system powered. An alarm will be issued before APO timer

count approaches the APO set time.

Page 15: LCR meter chipset

Ver 1.4 21/10/13 15

3. Backlight driver

Press TOL%/BKLIT key for more than 1 second to toggle the BL (pin32 of ES169) to

output high/low level. The BL will output low automatically, when the backlight

timer counter reaches the backlight set time.

4. Battery detection

The ES169 will detect the battery multi-level voltages periodically. The LCD

annunciators (BAT4 ~ BAT1) of battery life will be disappeared according to the

decreasing of battery voltage.

5. LCD test

Press Hold/MMA key for more than 1 second during power up to test the LCD. All

annunciators are displayed in the LCD. Press Hold/MMA key again to exit this

mode.

6. Manual range/ auto range

In auto ranging, the ES169 automatically selects an appropriate range to display the

highest available precision. Press Range/Auto key to switch the manual range

mode.

In manual, user can cycle through the Range/Auto key to select the range he wants.

Press Range/Auto key for more than 1 seconds to switch the auto range mode.

7. Hold

Press the Hold/MMA key to freeze the display for any measurement mode. The

Hold annunciator will show on the display while the Hold mode. Press the

Hold/MMA key again will update a new reading on the display. Press the

Hold/MMA key for more than 1 seconds to exit Hold mode.

8. Maximum, Minimum and Average

Press the Hold/MMA key for more than 1 seconds to enter MMA mode while any

measurement mode.

In MMA mode8

Press the Hold/MMA key again to cycle through follow display mode:

⚫ Max: the maximum reading5.

⚫ Min: the minimum reading6.

5 It will not update the maximum value if display value is OL.

Page 16: LCR meter chipset

Ver 1.4 21/10/13 16

⚫ Avg: the average reading.

⚫ MaxMinAvg: the current reading.

Press the Hold/MMA key for more than 1 seconds to exit MMA mode.

9. Sorting by tolerance mode

The tolerance ranges available are 1%, 5%, 10% and 20%.

To enable the tolerance mode:

⚫ Inset a component into the input, then press the TOL%/BKLIT key to set

the reading value7 as the standard reference tolerance.

⚫ In Hold mode or MMA mode, press the TOL%/BKLIT key to set the

display value7 as the standard reference tolerance.

In tolerance mode8:

⚫ The standard reference value is shown on the primary display.

⚫ Press TOL%/BKLIT to cycle through 1%, 5%, 10% and 20% tolerance.

⚫ Replace a component to start a new sorting.

⚫ It will beep three times if the component exceeds the set reference,

otherwise, when it beeps once, it indicates that the component is within

the set tolerance.

⚫ The tolerance error is shown as percentage on the secondary display.

⚫ Press any key to exit tolerance mode exclude TOL%/BKLIT key.

10. Sorting by limit function

User can use upper and lower limits for sorting. There are thirty-two limit set

available.

To enable the limit function:

⚫ Press the DQθ/Limit key for more than 1 second to enter limit function

while any measurement mode.

⚫ While the Limit annunciator is flashing, use the Freq Up/ESR or Freq

Down/DCR to select an appropriate limit set.

⚫ Press the DQθ/Limit or Range/Auto to toggle between the upper or

lower values shown on the primary display.

⚫ Press Hold/MMA to start sorting when the Limit annunciator flashing.

(If no key is pressed, sorting will also begin after 3 seconds.)

Limit function is enabled:

6 It will not update the minimum value if display is less than 50 counts. 7 The tolerance mode cannot be activated if display value is OL or less than 50 counts. 8 It will automatically switch to manual range if it is in auto range.

Page 17: LCR meter chipset

Ver 1.4 21/10/13 17

⚫ Insert component into input, the ES169 drive beeper to make three beeps

and display nGo on the secondary display if the reading is greater ▲

than the upper limit or lesser ▼ than the lower limit.

⚫ Insert component into input, the ES169 drive beeper to make once beep

and display Go on the secondary display if the reading is within upper

limit and lower limit.

⚫ Press the DQθ/Limit key for more than 1 second to disable limit

function.

11. Relative function

The reading value is the difference between the input value and the stored value.

To enable the relative function:

⚫ The present display value9 is stored as stored value when the Rel/Cal

key is pressed while measurement mode.

Relative function is enabled:

⚫ The Δ annunciator is shown on the display.

⚫ Press Rel/Cal key to disable relative function.

12. Auto identification function

The Ai function helps to identify R, L, and C measurements automatically

according to the angle of impedance detected from input. See Table 3.

To enable the auto identification function:

⚫ Press Ai/Setup to start auto identification function.

When auto identification function is enabled:

⚫ Selects an appropriate measurement for input.

⚫ Selects an appropriate range.

⚫ Selects parallel or series mode automatically.

Table 3. auto identification phase angle rule

Phase angle Primary display Secondary display

-θset < θ < +θset10 R θ

θ ≥ +θset L Q

θ ≤ -θset C D

9 The relative mode cannot be activated if the display value is OL. 10 The default θset is set to 10∘.

Page 18: LCR meter chipset

Ver 1.4 21/10/13 18

13. Dissipation factor/ quality factor/ phase angle (D/Q/θ)

Press DQθ/Limit key to cycle through dissipation factor, quality factor, and phase

angle while resistance, inductance, capacitance, or impedance measurement mode.

This setting is not application for DCR and ESR measurement.

14. Resistance, inductance, capacitance, and impedance measurement

i. Press the Freq Down/DCR or Freq Up/ESR to select a suitable test frequency.

ii. Press the ZLCR/Pal_Ser key to cycle through resistance, inductance,

capacitance and impedance measurement mode.

iii. Press the Ai/Setup to enable the auto identification function.

iv. Insert a component into the input.

v. Read the displays.

15. Parallel/Series circuit mode (P/S)

Press the ZLCR/Pal_Ser key for more than 1 second to toggle parallel or series

mode. In auto identification mode, it switches to parallel mode automatically if

impedance is greater than 10kΩ or switched to series mode automatically if

impedance is lower than 10kΩ.

16. DC bias

Use the DC bias to turn on the active components for measurement.

To enable DC bias:

i. Press the Ai/Setup for more than 1 second to enter setup menu.

ii. Press the DQθ/Limit or Range/Auto key to switch to DC menu.

iii. Press the Freq Up/ESR or Freq Down/DCR key to select DC bias level11,13.

iv. Press the Hold/Rec to confirm changes or press ZLCR/Pal_Ser to exit setup

menu.

Table 4. DC bias

LEVEL

DC bias 0V

1V

11 The DC bias level available are 0VDC, and 1VDC.

Page 19: LCR meter chipset

Ver 1.4 21/10/13 19

17. Test signal amplitude

Select an appropriate test signal amplitude to measure the component.

To change the test signal amplitude:

i. Press the Ai/Setup for more than 1 second to enter setup menu.

ii. Press the DQθ/Limit or Range/Auto key to switch to AC menu.

iii. Press the Freq Up/ESR or Freq Down/DCR key to select test signal

amplitude12,13.

iv. Press the Hold/Rec to confirm changes or press ZLCR/Pal_Ser to exit setup

menu.

Table 5. Test signal amplitude

Amplitude (RMS)

Test signal amplitude

1V

0.5V

0.25V

18. ESR measurement

Use the ESR measurement to measure the equivalent series resistance.

To enable ESR measurement:

⚫ Press Freq Up/ESR for more than 1 second to start ESR measurement.

When ESR measurement is enabled:

⚫ Select a suitable test frequency.

⚫ Press Freq Up/ESR for more than 1 second to exit ESR measurement.

19. DCR measurement

Use the DCR measurement to measure the resistance of component by 1VDC.

To enable DCR measurement:

⚫ Press Freq Down/DCR for more than 1 second to start DCR

measurement.

When ESR measurement is enabled:

⚫ Press Freq Down/DCR for more than 1 second to exit DCR

measurement.

12 The amplitude available are 1000m, 500m, and 250mVRMS. 13 The peak value of the test signal does not exceed 2.5V, including DC bias and AC amplitude.

Page 20: LCR meter chipset

Ver 1.4 21/10/13 20

20. Test frequency select

Press Freq Up key and Freq Down key to select the test frequency.( See Table 10.)

Page 21: LCR meter chipset

Ver 1.4 21/10/13 21

Table 6. resistance display range with frequency

Function Frequency Scale Range Resolution

RS/RP

100Hz

200.00 0.01

2.0000k 0.1

20.000k 1

200.00k 0.01k

2.0000M 0.1k

20.00M 1k

1kHz

20.000 1m

200.00 0.01

2.0000k 0.1

20.000k 1

200.00k 0.01k

2.0000M 0.1k

20.00M 1k

10kHz

20.000 1m

200.00 0.01

2.0000k 0.1

20.000k 1

200.00k 0.01k

2.0000M 0.1k

20.00M 0.01M

100kHz/200kHz/250kHz

20.000 1m

200.00 0.01

2.0000k 0.1

20.000k 1

200.00k 0.01k

2.000M 1k

Table 7. DC resistance display range

Function Scale Range Resolution

DCR

200.00 0.01

2.0000k 0.1

20.000k 1

200.00k 0.01k

2.0000M 0.1k

20.00M 1k

Page 22: LCR meter chipset

Ver 1.4 21/10/13 22

Table 8. Capacitance display range with frequency

Function Frequency Scale Range Resolution

CS/CP

100Hz

20.000nF 1pF

200.00nF 0.01nF

2000.0nF 0.1nF

20.000uF 1nF

200.00uF 0.01uF

2000.0uF 0.1uF

20.00mF 0.01mF

1kHz

2.0000nF 0.1pF

20.000nF 1pF

200.00nF 0.01nF

2000.0nF 0.1nF

20.000uF 1nF

200.00uF 0.01uF

2.000mF 1uF

10kHz

200.00pF 0.01pF

2000.0pF 0.1pF

20.000nF 1pF

200.00nF 0.01nF

2000.0nF 0.1nF

20.000uF 1nF

200.0uF 0.1uF

100kHz/200kHz/250kHz

200.00pF 0.01pF

2000.0pF 0.1pF

20.000nF 1pF

200.00nF 0.01nF

2000.0nF 0.1nF

20.00uF 0.01uF

Page 23: LCR meter chipset

Ver 1.4 21/10/13 23

Table 9. Inductance display range with frequency.

Function Frequency Scale Range Resolution

LS/LP

100Hz

20.000mH 1uH

200.00mH 0.01mH

2000.0mH 0.1mH

20.000H 1mH

200.00H 0.01H

2000.0H 0.1H

20.000kH 0.001kH

1kHz

2.0000mH 0.1uH

20.000mH 1uH

200.00mH 0.01mH

2000.0mH 0.1mH

20.000H 1mH

200.00H 0.01H

2.0000kH 0.1H

10kHz

200.00uH 0.01uH

2000.0uH 0.1uH

20.000mH 1uH

200.00mH 0.01mH

2000.0mH 0.1mH

20.000H 1mH

100kHz/200kHz/250kHz

20.000uH 0.001uH

200.00uH 0.01uH

2000.0uH 0.1uH

20.000mH 1uH

200.00mH 0.01mH

Table 10. frequency tuning

Tuning value Frequency

1.5 150Hz — 15kHz 150kHz

1.2 120Hz — 12kHz 120kHz

1.0 100Hz 1kHz 10kHz 100kHz

0.8 — 800Hz 8kHz 80kHz

0.6 — 600Hz 6kHz 60kHz

0.5 — 500Hz 5kHz 50kHz

0.4 — 400Hz 4kHz 40kHz

0.3 — 300Hz 3kHz 30kHz

0.25 — 250Hz — 25kHz

0.2 — 200Hz 2kHz 20kHz

Page 24: LCR meter chipset

Ver 1.4 21/10/13 24

21. Calibration function

The Calibration function corrects the system internal parameters as well as external

connector residues for precision measurement. It is recommended to do open/short

calibration before measurement.

i. Press Rel/Cal key for more than 1 second to enter calibration menu.

ii. Press Freq Up/ESR or Freq Down/DCR to switch open or short calibration.

iii. Press Hold/Rec to start calibration.

iv. Press Rel/Cal key for more than 1 second to exit calibration menu.

The CAL annunciator is shown on secondary display and flash during the

calibration process. After the open/short calibration is completed, the CAL

annunciator is constantly shown on secondary display and the ES169 will store the

calibration data in its ROM memory.

The open/short annunciator is constantly shown on primary display during the

calibration process. If the input is out of tolerance, the open/short annunciator will

flash.

22. Power-on setup (PON setup)

The setup menu allows user to change the default value for several functions.

Table 11. PON setup menu key function

Keypad Description

ZLCR/Pal_Ser Press and hold ZLCR/Pal_Ser while turning the

system ON to enter PON setup menu.

While the menu item is flashing, press

ZLCR/Pal_Ser to cancel the changes.

DQθ/Limit, Range/Auto Press DQθ/Limit or Range/Auto to setup through

the menu items.

Freq Up/ESR, Freq

Down/DCR Press Freq Up/ESR or Freq Down/DCR to enter

the item menu.

Press Freq Up/ESR or Freq Down/DCR again to

change the item value.

Press Freq Up/ESR or Freq Down/DCR for more

than 1 second to increase/ decrease a numerical

value faster.

HOLD/MMA . While the menu item is flashing, press

HOLD/MMA to save the changes.

Page 25: LCR meter chipset

Ver 1.4 21/10/13 25

Table 12. menu items

Parameter Value Default

value

Measurement type Ai, Z, L, R, C, ESR and

DCR

Ai

Testing signal

frequency

100Hz, 1kHz, 10kHz,

100kHz, 200kHz, 250kHz

1kHz

Z D, Q, or θ

Parallel or series

θ

Series

L D, Q, or θ

Parallel or series

Q

Series

R D, Q, or θ

Parallel or series

θ

Series

C D, Q, or θ

Parallel or series

D

Parallel

Ai (θ) 5°~45° 10°

Calibration

(open/short)

Factory or user Factory

Limit Factory or user

00~15

Factor

00

Limit (upper or lower) 0-19999 See Table 13

Uart (baud rate) 9600 or 19200 9600

Uart (parity) Even, odd or none None

Uart (data bits) 7 bits or 8 bits 7 bits

Beep frequency 1k, 1.33k, 2k, 2.22k, 2.667k,

3.080k, 3.333k, 4kHz

1kHz

Lock keypad OFF or ON OFF

APO OFF – 99 minutes 5 minutes

Backlight OFF – 99 seconds 30 seconds

Reset Reset to factory value

Page 26: LCR meter chipset

Ver 1.4 21/10/13 26

Table 13. Limit set

Set Upper limit (H) Lower limit (L)

00 1000 900

01 1200 1080

02 1500 1350

03 1800 1620

04 2200 1980

05 2700 2430

06 3300 2970

07 3900 3510

08 4700 4230

09 5600 5040

10 6800 6120

11 8200 7380

12 10000 9000

13 12000 10800

14 15000 13500

15 18000 16200

Page 27: LCR meter chipset

Ver 1.4 21/10/13 27

Accuracy (Ae) vs. Impedance (ZDUT)

Table 14. Accuracy (Ae) vs. Impedance (ZDUT) @ Ta =18 ~ 28 ℃, 1.0 / 0.5VRMS

Z

Freq.

~0.1Ω14

10Ω

~1Ω14

100KΩ

~10Ω

1MΩ

~100KΩ

10MΩ

~1MΩ Remark

DCR 1.0%+5d 0.5%+3d 0.3%+2d 0.5%+3d 1.0%+5d

D<0.1

100Hz 1.0%+5d 0.5%+3d 0.3%+2d 0.5%+3d 2%+5d

1kHz 1.0%+5d 0.5%+3d 0.3%+2d 0.5%+3d 2%+5d

10kHz 1.0%+5d 0.5%+3d 0.3%+2d 0.7%+3d 2%+5d

100kHz 2.0%+5d 1.0%+5d 0.5%+3d 1%+5d

200kHz 2.0%+5d 1.0%+5d 0.5%+3d 3%+5d

250kHz 2.0%+5d 1.0%+5d 0.6%+3d 4%+5d

Note: All accuracy is guaranteed by proper ratio resistor calibration and open/short

calibration. All accuracy is guaranteed for 10cm distance from VDUTH/VDUTL pins of

ES168.

The higher the DC bias level or the lower the testing signal amplitude, the worse the

accuracy.

If D > 0.1, the accuracy should be multiplied by 21 D+

ZC = 1/2πf C if D << 0.1 in capacitance mode

ZL = 2πf L if D << 0.1 in inductance mode

Sub-display parameters accuracy

Ae = impedance (Z) accuracy

Definition: Q = D

1

Rp = ESR (or Rs) (1+ 21

D)

1. D value accuracy De = + Ae (1+D)

2. ESR accuracy Re= + ZM Ae ()

ie., ZM = impedance calculated by fC2

1 or 2πf L

3. Phase angle accuracy e= + (180/) Ae (deg)

14 The accuracy does not apply to measure 0.1Ω to 10Ω when DC bias is added. The error increased by

more than 1%.

Page 28: LCR meter chipset

Ver 1.4 21/10/13 28

4-terminals measurement with guard shielding

The DUT test leads are implemented by four terminals measurement. For achieve the accuracy

shown above, it is necessary to do open/short calibration process before measurement. The

test leads for DUT should be as short as possible. If long extended cable is used, the

guard shielding is necessary.

Page 29: LCR meter chipset

Ver 1.4 21/10/13 29

LCD Truth table

Table 15. LCD truth table

LCD Segment COM1 COM2 COM3 COM4

SEG01 delta tol hold pc

SEG02 fd1-3 fd1-1 fd1-2 ai

SEG03 fd1-6 fd1-4 fd1-7 fd1-5

SEG04 fd2-3 fd2-1 fd2-2 Z

SEG05 fd2-6 fd2-4 fd2-7 fd2-5

SEG06 fd3-3 fd3-1 fd3-2 L

SEG07 fd3-6 fd3-4 fd3-7 fd3-5

SEG08 k1 hz M1 R

SEG09 td1-3 td1-1 td1-2 C

SEG10 td1-6 td1-4 td1-7 td1-5

SEG11 td2-3 td2-1 td2-2 td2-8

SEG12 td2-6 td2-4 td2-7 td2-5

SEG13 D MINUS1 Q %1

SEG14 sd1-3 sd1-1 sd1-2 sd1-8

SEG15 sd1-6 sd1-4 sd1-7 sd1-5

SEG16 sd2-3 sd2-1 sd2-2 sd2-8

SEG17 sd2-6 sd2-4 sd2-7 sd2-5

SEG18 sd3-3 sd3-1 sd3-2 sd3-8

SEG19 sd3-6 sd3-4 sd3-7 sd3-5

SEG20 BEEP degree %2

SEG21 ESR

SEG22 AVG MIN MAX

SEG23 AUTO Parallel (P) Series (S)

SEG24 B1 B2 B3 B4

SEG25 H F S OHM

SEG26 n(m) u k2

SEG27 r(m) P M2

SEG28 md5-6 md5-4 md5-7 md5-5

SEG29 md5-3 md5-1 md5-2 md5-8

SEG30 md4-6 md4-4 md4-7 md4-5

SEG31 md4-3 md4-1 md4-2 md4-8

SEG32 md3-6 md3-4 md3-7 md3-5

SEG33 md3-3 md3-1 md3-2 md3-8

SEG34 md2-6 md2-4 md2-7 md2-5

SEG35 md2-3 md2-1 md2-2 md2-8

SEG36 md1-1 md1-2 apo

SEG37 Limit up MINUS2 down

Page 30: LCR meter chipset

Ver 1.4 21/10/13 30

LCD configuration

LCD display active condition

LCD annunciates Condition

PC Remote access indicator

Hold HOLD function is enabled

Tol Tolerance function is enabled

Delta Relative function is enabled

fdm-n Testing frequency or DCR display

K1, M1, Hz Units for testing frequency

tdm-n Tolerance display

%1 Units for Tolerance

D Dissipation factor indicator

Q Quality factor indicator

Phase angle of impedance indicator

%2 Measurement units for tolerance

MINUS1, sdm-n Secondary display

Beep Alert indicator for sorting

Ai Auto identification function is enabled

Z Impedance measurement indicator

L Inductance measurement indicator

R Resistance measurement indicator

C Capacitance measurement indicator

ESR ESR measurement indicator

Max, Min, Avg MMA function is enabled

Auto Auto range function is enabled

Limit Limit for sorting indicator

up Reading out of upper limit

Down Reading out of lower limit

APO Auto power-off indicator

MINUS2, mdm-n Primary display

Parallel (P) Parallel mode indicator

Series (S) Series mode indicator

p, u, m, k, M, F, H,

ohm, S Measurement units for primary display

B1, B2, B3, B4 Battery voltage indicator

Page 31: LCR meter chipset

Ver 1.4 21/10/13 31

LCD COM/SEG driver output

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

COM1

COM2

COM3

COM4

LCD SEGn ON when

COM3 is active

1/4 duty 1/3 bias frame rate 62.5Hz

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

V1

V2

V3

VSS

COM1

COM2

COM3

COM4

LCD SEGn ON when

COM3 is active

1/4 duty 1/3 bias frame rate 62.5Hz

Page 32: LCR meter chipset

Ver 1.4 21/10/13 32

UART Interface

Baud rate 9600/19200 bps

Start bit 1 bit

Data bits 7/8 bits

Stop bit 1 bit

Parity none/ odd/ even

User can access the system through UART interface. The system receives the command,

it enters remote function and PC annunciator is shown on display. The system sends

impedance readings via the UART when it receives “READ?” command. Press any key

to exit remote function.

Table 16. command table

Change testing signal frequency

Command <value> Hz

Response OK

Example: “10kHz;”. When the command is received, the system changes the test

signal frequency to 10 kHz.

Change measurement type

Command TYPE {<value>| Ai | ESR | R | L | C | Z |}, {<mode>| PARALLE | SERIES |}

Response OK

Example: “TYPE R, SERIES”. When the command is received, the system changes

the measurement type to resistance measurement and series mode.

Change testing signal amplitude

Command AC {<value>| 1 | 0.5 | 0.25 |}

Response OK

Example: “AC 1”. When the command is received, the system changes the test signal

amplitude to 1VRMS.

Change DC bias level

Command DC {<value>| 0 | 1 |}

Response OK

Example: “DC 1”. When the command is received, the system changes DC bias to

1VDC.

Change conversion rate

Command INT {<value>| 0 | 1 | 2 |}

Response OK

Example: “INT 1”. When the command is received, the system will change the

conversion rate to 200 milliseconds.

Read impedance value and primary display value

Command READ?

Response See Table 17

Example: “READ?”. When the command is received, the system continuously send

read value to PC.

Page 33: LCR meter chipset

Ver 1.4 21/10/13 33

Table 17. read command response

Frequency Parallel/Series R/L/C/Z/DCR/ESR R+Xj

Frequency Freq:<value>

Parallel or series mode <parallel, series>

R/L/C/Z/DCR/ESR Current measurement mode indication

R +Xj Real part and imaginary part

Page 34: LCR meter chipset

Ver 1.4 21/10/13 34

Application circuit

BZ

1

Buzzer

BU

ZO

UT

+

C22

10uF

V+

C23

0.1

uF

C20

0.1

uF

V-

+C

19

10uF

AG

ND

AG

ND

DTH40

GNDA39

VSRC38

GNDA41

DTL42

GNDA43

SW144

SW245

SW346

SW447

SW548

CA

2+

1

CA

2-

2

RIN

T2

3

CIN

T2-

4

CIN

T2+

5

GN

DA

6

VR

7

VR

H8

VD

DA

9

VD

DA

10

OS

C1

12

NC

11

BUZOUT15

DATANEW16

UB17

CEB18

SCL19

SDA20

IOCTRL21

VCC22

GNDD23

VDDD14

OSC213

NC

26

NC

35

VS

SD

25

VS

SA

27

VS

SA

28

RB

29

TE

ST

130

GN

DA

31

CIN

T1+

32

CIN

T1-

33

RIN

T1

34

CA

1-

36

CA1+37

GNDD24

U5

ES

168

R36 100

R37 100

R38 100

HPOT

HCUR

LPOT

C14

220nF

R42

100K

C13

22uF

AG

ND

AG

ND

V+

VR

210K

R45

33K

AG

ND

AG

ND

C17

300pF

VR

HV

R_L

CLCURR35 100

R34 1KR33 10KR32 100KR31 1M

C15

220nF

R43

100K

AG

ND

V-

C12

22uF

AG

ND

UBoutDRDY

MCU_VSS

BUZOUT

CEBSCLSDA

MCU_VCC

Y1

24M

Hz

DG

ND

V+

VR

HV

R_L

C

VR

->D

CR

=1V

V-

VR

H1 TP

4

VR

H

R48

20K

V-

Metallized

Poly

pro

pylen

e Film

CA

P : C

15, C

14

Mylar o

r NP

O C

eramic C

AP

: C13 , C

12

1 2 3 4 5 6

P4

MC

U_V

CC

MC

U_V

SS

SD

AS

CL

DR

DY

UB

out

R39

10K

R40

10K

MC

U_V

CC

HP

OT

HC

UR

LC

UR

LP

OT

HC

UR

HP

OT

LC

UR

LP

OT

GU

AR

D

C18

20nF

C34

5pF

AG

ND

10M

Q?

2N

7002

AG

ND

VB

AT

34k

2N

3906

100

VB

AT

ES168 Circuit

Page 35: LCR meter chipset

Ver 1.4 21/10/13 35

DRDY

SCLSDA

MC

U_

VS

SM

CU

_V

CC

CO

M0

CO

M1

CO

M2

CO

M3

SE

G0

SE

G1

SE

G2

SE

G3

SE

G4

SE

G5

SE

G6

SE

G7

SE

G8

SE

G9

SE

G10

SE

G11

SE

G12

SEG13SEG14SEG15SEG16SEG17SEG18SEG19SEG20SEG21SEG22SEG23SEG24SEG25SEG26SEG27SEG28

SEG31SEG32

SE

G33

SE

G34

SE

G35

SE

G37

SE

G39

SE

G40

KEY_OUT0

KEY_OUT1

KEY_OUT2

KEY_OUT3

KE

Y_

IN2

KE

Y_

IN1

KE

Y_

IN0

SW2

Ai

SW3

Freq_T/ESR

SW4

Hold

SW5

DQƟ

SW6

Freq.

SW7

Range

SW8

ZLCR

SW10

Δ NULL

SW9

Tol%

SW11

KEY41

SW12

KEY42

SW13

KEY43

BL

UBout

SE

G0

SE

G1

SE

G2

SE

G3

SE

G4

SE

G5

SE

G6

SE

G7

SE

G8

SE

G9

SE

G19

SE

G20

SE

G21

SE

G22

SE

G23

SE

G24

SE

G25

SE

G26

SE

G27

SE

G28

SE

G31

SE

G32

SE

G33

SE

G34

SE

G35

/RES

TX

KEY_IN0KEY_IN1KEY_IN2KEY_OUT0KEY_OUT1KEY_OUT2KEY_OUT3

C11 0.1uF

C10 0.1uF

MCU_VSSC9 0.1uF

MCU_VSS

D4 LED

R27 10K

R25 300

Q72N3904

BL

MC

U_

VC

CM

CU

_V

SS

APO_DIS

PW

R

MC

U_

AV

SS

PW

R_

KE

Y1

RX

MC

U_

AV

DD

SW1

POWER

PWR_KEY

VPPTC

PW

R_

SE

N

1234

P2

UART

MCU_VCCMCU_VSSRXTX

1234

P1

ICP

MCU_VCCMCU_VSSICPDAICPCK

ICPDAICPCK

CO

M0

CO

M1

CO

M2

CO

M3

CO

M1

1

CO

M2

2

CO

M3

3

CO

M4

4

SE

G1

5

SE

G2

6

SE

G3

7

SE

G4

8

SE

G5

9

SE

G6

10

SE

G7

11

SE

G8

12

SE

G9

13

SE

G10

14

SE

G11

15

SE

G12

16

SE

G13

17

SE

G14

18

SE

G15

19

SE

G16

20

SE

G17

21

SE

G18

22

SE

G19

23

SE

G20

24

SE

G21

25

SE

G22

26

SE

G23

27

SE

G24

28

SE

G25

29

SE

G26

30

SE

G27

31

SE

G28

32

SE

G29

33

SE

G30

34

SE

G31

35

SE

G32

36

SE

G33

37

SE

G34

38

SE

G35

39

SE

G36

40

SE

G37

41

CO

M4

42

CO

M3

43

CO

M2

44

CO

M1

45

CON1LCD

SE

G39

SE

G40

SE

G37

R46100K

MCU_VCC

MCU_VSS

C80.1uF

C70.1uF

/RE

S

C28 0.1uF

C27 0.1uF

MCU_AVSS

MCU_VSS

C29 0.1uF

TXD1

DTR2

RST3

VDD_3254

RXD5

RI6

GND7

NC8

DSR9

DCD10

CTS11

SHTD12

GP313

GP214

DP15

DN16

VO_3317

GND18

RESET19

VDD_520

NC21

GP022

GP123

NC24

TEST26

NC27

RESERVED28

GND25

U2

PL2303HZ

C310.1uF

RX

TX

D_ND_P

VO33

C330.1uF

C320.1uF

1TP2

TP

+5VVO33

MCU_VCC

SEG311

SEG302

ICPDA3

ICPCK4

SEG295

SEG286

SEG277

SEG268

SEG259

SEG2410

SEG2311

SEG2212

SEG2113

SEG2014

SEG1915

SEG1816

SEG1717

SEG1618

SEG1519

SEG1420

SE

G13

21

SE

G12

22

SE

G11

23

SE

G10

24

SE

G9

25

VD

D2

6

VS

S2

7

SE

G8

28

SE

G7

29

SE

G6

30

SE

G5

31

BL

32

SE

G4

33

SE

G3

34

SE

G2

35

SE

G1

36

CO

M4

37

CO

M3

38

CO

M2

39

CO

M1

40

DRDY41

UB42

SCL43

SDA44

C245

C146

V247

V148

VMAX49

PLCD50

KEYOUT351

KEYOUT252

KEYOUT153

KEYOUT054

KEYIN255

KEYIN156

KEYIN057

NC58

NC59

APO_DIS60

AV

DD

61

PW

R6

2P

WR

_K

EY

63

AV

SS

64

LB

AT

65

NC

66

NC

67

NC

68

SE

G3

76

9S

EG

36

70

RX

71

TX

72

SE

G3

57

3N

C7

4/R

ES

75

VD

D7

6V

SS

77

SE

G3

47

8S

EG

33

79

SE

G3

28

0

ES169

+5V

VBUSD-D+ID

GNDHO

LD

0

USB1

USB-MINI

D_PD_N

R53 27

R5427R55

1.5k

VO33

FBM1PT800S

+C30

10uF

FBM2PT800S

D1_PD1_N

VBAT

ES169 Circuit

Page 36: LCR meter chipset

Ver 1.4 21/10/13 36

Power circuit

R41

500k

R44

1M

C16

0.1

uF

LD

O_G

ND

VinP

WR

_S

EN

C4

4.7

uF

V-

BA

T4.5

VB

AT

TE

RY

Q3

2N

3904

Q4

2N

3904

Q1

AC

E2301

R9

10M

R12

100K

R11

10M

R18

100K

R21

100K

12

J1+5V

VB

AT

+5V

LD

O_G

ND

D1

FM

5817

D2

FM

5817

+5V

R10

1M

R13

10K

Q2

AC

E2301

C3

0.1

uF

R22

1M

C6

0.1

uF

R16

500K

+5V

AP

O_D

IS

Q6

2N

3904

Q5

2N

3904

LD

O_G

ND

D3

1N

4148

R17

10K

R19

220K

PW

R

PW

R_K

EY

R23

100K

R20

100K

R24

100K

LD

O_G

ND

MC

U_V

CC

Vin

R8

0M

CU

_V

CC

MC

U_V

SS

PW

R_K

EY

1

VP

PT

C

V+

R4

0M

CU

_A

VD

D

MC

U_A

VS

S

R15

0

AG

ND

DG

ND

R5

0

PG

GO

D1

FB

+2

VIN

3

GN

D4

CP

5

OU

T-

6F

B-

7E

N-

8C

1-

9C

1+

10

OU

T+

11

EN

+12

THERMAL0

U1

LM

27762

LD

O_G

ND

C1

1uF

C2

4.7

uF

C5

4.7

uF

Ccp

1uF

R49

750k

R51

732k

R50

499k

R52

499k

Rpu

10k

LD

O_G

ND

LD

O_G

ND

LD

O_G

ND

+3V

-3V

-3VLD

O_G

ND

LD

O_G

ND

Vin

LD

O_G

ND

+3V

Vin

Vin

-3V

+3V

R6

0

Page 37: LCR meter chipset

Ver 1.4 21/10/13 37

Package information (LQFP-48 7x7)

Page 38: LCR meter chipset

Ver 1.4 21/10/13 38

Package information (LQFP-80)