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| 7106_15 Datasheet, PDF (6/18 Pages) Unisonic Technologies – CONVERTERS | |||
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7106
 DESIGN INFORMATION SUMMARY SHEET
*OSCILLATOR FREQUENCY
fosc=0.45/RC
COSC>50pF, ROSC>50kâ¦
fOSC (Typ)=48kHz
*OSCILLATOR PERIOD
tOSC=RC/0.45
*INTEGRATION CLOCK FREQUENCY
fCLOCK=fOSC/4
*INTEGRATION PERIOD
tINT=1000Ã(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=1000ÃVIN/VREF
*CONVERSION CYCLE
tCYC=tCLOCKÃ4000
tCYC=tOSCÃ16,000
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-
*VCOMâV+ - 2.8V
Regulation lost when V+ to V- <â6.8V
If VCOM is externally pulled down to (V+ to V-)/2, the VCOM circuit will turn off.
*POWER SUPPLY: SINGLE 9V
V+ - V- =9V
VGNDâV+ - 4.5V
Digital supply is generated by internal parts.
*DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
CMOS IC
6 of 18
QW-R502-018.E
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