7106G-R40-R datasheet(6/18 Pages) UTC

6 / 18 page

7106

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

6 of 18

www.unisonic.com.tw

QW-R502-018.D

DESIGN INFORMATION SUMMARY SHEET

*OSCILLATOR FREQUENCY

fosc=0.45/RC

COSC>50pF, ROSC>50kΩ

fOSC (Typ)=48kHz

*OSCILLATOR PERIOD

tOSC=RC/0.45

*INTEGRATION CLOCK FREQUENCY

fCLOCK=fOSC/4

*INTEGRATION PERIOD

tINT=1000×(4/fOSC)

*60/50Hz REJECTION CRITERION

tINT/t60Hz or tINT/t50Hz=Integer

*OPTIMUM INTEGRATION CURRENT

IINT=4μA

*FULL SCALE ANALOG INPUT VOLTAGE

VINFS (Typ)=200mV or 2V

*INTEGRATE ESISTOR

RINT= VINFS/ IINT

*INTEGRATE CAPACITOR

CINT=(tINT)(IINT)/ VINT

*INTEGRATOR OUTPUT VOLTAGE SWING

VINT=(tINT)(IINT)/ CINT

*VINT MAXIMUM SWING

(V- + 0.5V)<VINT<(V+ - 0.5V), VINT (Typ)=2V

*DISPLAY COUNT

COUNT=1000×VIN/VREF

*CONVERSION CYCLE

tCYC=tCLOCK×4000

tCYC=tOSC×16,000

When fOSC=48kHz, tCYC=333ms

*COMMON MODE INPUT VOLTAGE

(V- + 1V)<VIN<(V+ - 0.5V)

*AUTO-ZERO CAPACITOR

0.01μF<CAZ<1μF

*REFERENCE CAPACITOR

0.1μF<CREF<1μF

*VCOM

Biased between Vi and V-

*VCOM V+

≒

- 2.8V

Regulation lost when V+ to V- < 6.8V

≒

If VCOM is externally pulled down to (V+ to V-)/2, the VCOM circuit will turn off.

*POWER SUPPLY: SINGLE 9V

V+ - V- =9V

VGND V+

≒

- 4.5V

Digital supply is generated by internal parts.

*DISPLAY: LCD

Type: Direct drive with digital logic supply amplitude.

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