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ICL7106_0512 Datasheet, PDF (5/16 Pages) Intersil Corporation – 3½ Digit, LCD/LED Display, A/D Converters | |||
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ICL7106, ICL7107, ICL7107S
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 = 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
RINT
=
V-----I--N----F---S--
IINT
⢠INTEGRATE CAPACITOR
CINT
=
(---t--I--N----T----)--(--I--I--N----T----)
VINT
⢠INTEGRATOR OUTPUT VOLTAGE SWING
VINT
=
(---t--I--N----T----)--(--I--I--N----T----)
CINT
⢠VINT MAXIMUM SWING:
(V- + 0.5V) < VINT < (V+ - 0.5V), VINT (Typ) = 2V
⢠DISPLAY COUNT
COUNT
=
1000
Ã
---V-----I-N-----
VREF
⢠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
0.01µF < CAZ < 1µF
⢠REFERENCE CAPACITOR
0.1µF < CREF < 1µF
⢠VCOM
Biased between Vi and V-.
⢠VCOM â
V+ - 2.8V
Regulation lost when V+ to V- < â
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 â
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
Typical Integrator Amplifier Output Waveform (INT Pin)
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
5
FN3082.8
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