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ICL7107RCPLZ Datasheet(PDF) 5 Page - Intersil Corporation |
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ICL7107RCPLZ Datasheet(HTML) 5 Page - Intersil Corporation |
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5 / 16 page  5 FN3082.7 Typical Integrator Amplifier Output Waveform (INT Pin) 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 x (4/fOSC) • 60/50Hz REJECTION CRITERION tINT/t60Hz or tlNT/t60Hz = Integer • OPTIMUM INTEGRATION CURRENT IINT = 4µA • FULL SCALE ANALOG INPUT VOLTAGE VlNFS (Typ) = 200mV or 2V • INTEGRATE RESISTOR • INTEGRATE CAPACITOR • INTEGRATOR OUTPUT VOLTAGE SWING •VINT MAXIMUM SWING: (V- + 0.5V) < VINT < (V+ - 0.5V), VINT (Typ) = 2V • DISPLAY COUNT • CONVERSION CYCLE tCYC = tCL0CK x 4000 tCYC = tOSC x 16,000 when fOSC = 48kHz; tCYC = 333ms • COMMON MODE INPUT VOLTAGE (V- + 1V) < VlN < (V+ - 0.5V) • AUTO-ZERO CAPACITOR 0.01 µF < C AZ < 1µF • REFERENCE CAPACITOR 0.1 µF < 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. • ICL7106 POWER SUPPLY: SINGLE 9V V+ - V- = 9V Digital supply is generated internally VGND ≅ V+ - 4.5V • ICL7106 DISPLAY: LCD Type: Direct drive with digital logic supply amplitude. • ICL7107 POWER SUPPLY: DUAL ±5.0V V+ = +5V to GND V- = -5V to GND Digital Logic and LED driver supply V+ to GND • ICL7107 DISPLAY: LED Type: Non-Multiplexed Common Anode R INT V INFS I INT ----------------- = C INT t INT () I INT () V INT -------------------------------- = V INT t INT () I INT () C INT -------------------------------- = COUNT 1000 V IN V REF --------------- × = AUTO ZERO PHASE (COUNTS) 2999 - 1000 SIGNAL INTEGRATE PHASE FIXED 1000 COUNTS DE-INTEGRATE PHASE 0 - 1999 COUNTS TOTAL CONVERSION TIME = 4000 x tCLOCK = 16,000 x tOSC ICL7106, ICL7107, ICL7107S |
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