CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Input voltages may exceed the supply voltages provided the input current is limited to
±100µA.
2.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
SYSTEM PERFORMANCE
Zero Input Reading
(Note 3)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
IN
= 0.0V, Full Scale = 200mV
Fixed Input Voltage (Note 7)
-000.0
±000.0
±000.0
999/10
00
±0.2
+000.0
Digital
Reading
Digital
Reading
Digital
Reading
Counts
Stability (Last Digit) (ICL7106S, ICL7107S
Only)
Ratiometric Reading
-000.0
+000.0
V
lN
= V
REF
, V
REF
= 100mV
-V
IN
= +V
lN
≅
200mV
Difference in Reading for Equal Positive and
Negative Inputs Near Full Scale
Full Scale = 200mV or Full Scale = 2V Maximum
Deviation from Best Straight Line Fit (Note 6)
V
CM
= 1V, V
IN
= 0V, Full Scale = 200mV (Note 6)
V
IN
= 0V, Full Scale = 200mV
(Peak-To-Peak Value Not Exceeded 95% of Time)
V
lN
= 0 (Note 6)
V
lN
= 0, 0
o
C To 70
o
C (Note 6)
V
IN
= 199mV, 0
o
C To 70
o
C
,
(Ext. Ref. 0ppm/
o
C) (Note 6)
V
IN
= 0 (Does Not Include LED Current for ICL7107)
999
1000
±1
Rollover Error
-
Linearity
-
±0.2
50
15
±1
-
-
Counts
µV/V
µV
pA
µV/
o
C
ppm/
o
C
Common Mode Rejection Ratio
Noise
-
-
Leakage Current Input
Zero Reading Drift
Scale Factor Temperature Coefficient
-
-
-
1
0.2
1
10
1
5
End Power Supply Character V+ Supply
Current
-
1.0
1.8
mA
End Power Supply Character V- Supply Current ICL7107 Only
COMMON Pin Analog Common Voltage
25kΩ Between Common and
Positive Supply (With Respect to + Supply)
25kΩ Between Common and
Positive Supply (With Respect to + Supply)
-
2.4
0.6
3.0
1.8
3.2
mA
V
ppm/
o
C
Temperature Coefficient of Analog Common
-
80
-
DISPLAY DRIVER
ICL7106 ONLY
Peak-To-Peak Segment Drive Voltage
Peak-To-Peak Backplane Drive Voltage
V+ = to V- = 9V (Note 5)
4
5.5
6
V
3
ICL7106, ICL7107, ICL7106S, ICL7107S
Electrical Specifications
PARAMETER
DISPLAY DRIVER
ICL7107 ONLY
Segment Sinking Current
(Except Pins 19 and 20)
Pin 19 Only
Pin 20 Only
V+ = 5V, Segment Voltage = 3V
5
10
4
8
16
7
-
-
-
mA
mA
mA
(Note 3)
(Continued)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
NOTES:
3. Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
4. Unless otherwise noted, specifications apply to both the ICL7106 and ICL7107 at T
A
= 25
o
C, fCLOCK = 48kHz. ICL7106 is tested in the
circuit of Figure 1. ICL7107 is tested in the circuit of Figure 2.
5. Back plane drive is in phase with segment drive for ‘off’ segment, 180 degrees out of phase for ‘on’ segment. Frequency is 20 times
conversion rate. Average DC component is less than 50mV.
6. Not tested, guaranteed by design.
7. Sample Tested.
Typical Applications and Test Circuits
+
R
1
R
3
OSC 1 40
OSC 2 39
OSC 3 38
C
4
TEST 37
R
4
C
1
R
5
C
5
C
2
R
2
C
3
DISPLAY
REF HI 36
REF LO 35
C
REF
+ 34
C
REF
- 33
COM 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V- 26
G2 25
C3 24
A3 23
G3 22
ICL7106
20 POL
19 AB4
G1
D1
C1
B1
A1
D2
10 C2
11 B2
12 A2
15 D3
16 B3
V+
E1
14 E2
18 E3
F1
13 F2
17 F3
1
2
3
4
5
6
7
8
9
DISPLAY
FIGURE 1. ICL7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
+5V
R
5
C
1
C
5
C
2
R
2
C
3
DISPLAY
+
IN
-
-5V
R
1
R
3
OSC 1 40
OSC 2 39
OSC 3 38
C
4
TEST 37
R
4
BP 21
REF HI 36
REF LO 35
C
REF
+ 34
C
REF
- 33
COM 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V- 26
G2 25
C3 24
A3 23
G3 22
ICL7107
20 POL
19 AB4
G1
D2
10 C2
11 B2
12 A2
15 D3
16 B3
D1
C1
B1
A1
V+
E1
14 E2
18 E3
13 F2
17 F3
F1
1
2
3
4
5
6
7
8
9
DISPLAY
FIGURE 2. ICL7107 TEST CIRCUIT AND TYPICAL APPLICATION WITH LED DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
4
GND 21
-
C
1
= 0.1µF
C
2
= 0.47µF
C
3
= 0.22µF
C
4
= 100pF
C
5
= 0.02µF
R
1
= 24kΩ
R
2
= 47kΩ
R
3
= 100kΩ
R
4
= 1kΩ
R
5
= 1MΩ
C
1
= 0.1µF
C
2
= 0.47µF
C
3
= 0.22µF
C
4
= 100pF
C
5
= 0.02µF
R
1
= 24kΩ
R
2
= 47kΩ
R
3
= 100kΩ
R
4
= 1kΩ
R
5
= 1MΩ
+
IN
-
9V
ICL7106, ICL7107, ICL7106S, ICL7107S
Design Information Summary Sheet
• OSCILLATOR FREQUENCY
f
OSC
= 0.45/RC
C
OSC
> 50pF; R
OSC
> 50kΩ
f
OSC
(Typ) = 48kHz
• OSCILLATOR PERIOD
t
OSC
= RC/0.45
• INTEGRATION CLOCK FREQUENCY
f
CLOCK
= f
OSC
/4
• INTEGRATION PERIOD
t
INT
= 1000 x (4/f
OSC
)
• 60/50Hz REJECTION CRITERION
t
INT
/t
60Hz
or t
lNT
/t
60Hz
= Integer
• OPTIMUM INTEGRATION CURRENT
I
INT
= 4µA
• FULL SCALE ANALOG INPUT VOLTAGE
V
lNFS
(Typ) = 200mV or 2V
• INTEGRATE RESISTOR
V
INFS
R
INT
= ----------------
-
I
INT
• DISPLAY COUNT
V
IN
-
COUNT
=
1000
×
--------------
V
REF
• CONVERSION CYCLE
t
CYC
= t
CL0CK
x 4000
t
CYC
= t
OSC
x 16,000
when f
OSC
= 48kHz; t
CYC
= 333ms
• COMMON MODE INPUT VOLTAGE
(V- + 1V) < V
lN
< (V+ - 0.5V)
• AUTO-ZERO CAPACITOR
0.01µF < C
AZ
< 1µF
• REFERENCE CAPACITOR
0.1µF < C
REF
< 1µF
• V
COM
Biased between Vi and V-.
• V
COM
≅
V+ - 2.8V
Regulation lost when V+ to V- <
≅6.8V
If V
COM
is externally pulled down to (V+ to V-)/2,
the V
COM
circuit will turn off.
• ICL7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
V
GND
≅
V+ - 4.5V
• ICL7106 DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
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