ICL7106 Datasheet

  • ICL7106

  • 3 1/2 Digit, LCD/LED Display, A/D Converters

  • 533.79KB

  • 16页

  • INTERSIL   INTERSIL

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ICL7106, ICL7107, ICL7107S
Design Information Summary Sheet
鈥?OSCILLATOR FREQUENCY
f
OSC
= 0.45/RC
C
OSC
> 50pF; R
OSC
> 50k鈩?/div>
f
OSC
(Typ) = 48kHz
鈥?OSCILLATOR PERIOD
t
OSC
= RC/0.45
鈥?INTEGRATION CLOCK FREQUENCY
f
CLOCK
= f
OSC
/4
鈥?INTEGRATION PERIOD
t
INT
= 1000 x (4/f
OSC
)
鈥?60/50Hz REJECTION CRITERION
t
INT
/t
60Hz
or t
lNT
/t
60Hz
= Integer
鈥?OPTIMUM INTEGRATION CURRENT
I
INT
= 4碌A
鈥?FULL SCALE ANALOG INPUT VOLTAGE
V
lNFS
(Typ) = 200mV or 2V
鈥?INTEGRATE RESISTOR
V
INFS
R
INT
= ----------------
-
I
INT
鈥?DISPLAY COUNT
V
IN
-
COUNT
=
1000
--------------
V
REF
鈥?CONVERSION CYCLE
t
CYC
= t
CL0CK
x 4000
t
CYC
= t
OSC
x 16,000
when f
OSC
= 48kHz; t
CYC
= 333ms
鈥?COMMON MODE INPUT VOLTAGE
(V- + 1V) < V
lN
< (V+ - 0.5V)
鈥?AUTO-ZERO CAPACITOR
0.01碌F < C
AZ
< 1碌F
鈥?REFERENCE CAPACITOR
0.1碌F < C
REF
< 1碌F
鈥?V
COM
Biased between Vi and V-.
鈥?V
COM
鈮?/div>
V+ - 2.8V
Regulation lost when V+ to V- <
鈮?.8V
If V
COM
is externally pulled down to (V+ to V-)/2,
the V
COM
circuit will turn off.
鈥?ICL7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
V
GND
鈮?/div>
V+ - 4.5V
鈥?ICL7106 DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
鈥?ICL7107 POWER SUPPLY: DUAL
卤5.0V
V+ = +5V to GND
V- = -5V to GND
Digital Logic and LED driver supply V+ to GND
鈥?ICL7107 DISPLAY: LED
Type: Non-Multiplexed Common Anode
鈥?INTEGRATE CAPACITOR
(
t
INT
) (
I
INT
)
C
INT
= -------------------------------
-
V
INT
鈥?INTEGRATOR OUTPUT VOLTAGE SWING
(
t
INT
) (
I
INT
)
V
INT
= -------------------------------
-
C
INT
鈥?V
INT
MAXIMUM SWING:
(V- + 0.5V) < V
INT
< (V+ - 0.5V), V
INT
(Typ) = 2V
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 t
CLOCK
= 16,000 x t
OSC
5
FN3082.7

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