January 1998
ICL7106, ICL7107,
ICL7106S, ICL7107S
31/2 Digit,
LCD/LED Display, A/D Converters
Features
• Guaranteed Zero Reading for 0V Input on All Scales
• True Polarity at Zero for Precise Null Detection
• 1pA Typical Input Current
• TrueDifferential Input and Reference, Direct Display Drive
- LCD ICL7106, LED lCL7107
• Low Noise - Less Than 15µV
• On Chip Clock and Reference
• Low Power Dissipation - Typically Less Than 10mW
• No Additional Active Circuits Required
• Enhanced Display Stability (ICL7106S, ICL7107S)
P-P
Ordering Information
TEMP.
PART NO.
ICL7106CPL 0 to 70 40 Ld PDIP E40.6
ICL7106RCPL 0 to 70 40 Ld PDIP (Note) E40.6
ICL7106CM44 0 to 70 44Ld MQFP Q44.10x10
ICL7106SCPL 0 to 70 40 Ld PDIP E40.6
RANGE (oC) PACKAGE PKG. NO.
Description
The Intersil ICL7106 and ICL7107 are high performance, low
power, 3
ment decoders, display drivers, a reference, and a clock.
The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the
ICL7107 will directly drive an instrument size light emitting
diode (LED) display.
The ICL7106 and ICL7107 bring together a combination of
high accuracy, versatility, and true economy. It features autozero to less than 10µV, zero drift of less than 1µV/
bias current of 10pA (Max), and rollover error of less than
one count. True differential inputs and reference are useful in
all systems, but give the designer an uncommon advantage
when measuring load cells, strain gauges and other bridge
type transducers. Finally, the true economy of single power
supply operation (ICL7106), enables a high performance
panel meter to be built with the addition of only 10 passive
components and a display.
1
/2digit A/D converters. Included are seven seg-
o
C, input
ICL7107SCPL 0 to 70 40 Ld PDIP E40.6
ICL7107CPL 0 to 70 40 Ld PDIP E40.6
ICL7107RCPL 0 to 70 40 Ld PDIP (Note) E40.6
ICL7107CM44 0 to 70 44Ld MQFP Q44.10x10
NOTE: “R” indicates device with reversed leads for mounting to PC
board underside. “S” indicates enhanced stability.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
1
File Number 3082.2
Pinouts
ICL7106, ICL7107, ICL7106S, ICL7107S
(100’s)
(MINUS)
(1’s)
(10’s)
(1000) AB4
POL
ICL7106, ICL7107 (PDIP)
TOP VIEW
1
V+
2
D1
3
C1
4
B1
5
A1
6
F1
7
G1
8
E1
9
D2
10
C2
11
B2
12
A2
13
F2
14
E2
15
D3
16
B3
17
F3
18
E3
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
+
C
REF
-
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
VG2 (10’s)
C3
(100’s)
A3
G3
BP/GND
REF HI
REF LO
COMMON
G2 (10’s)
(100’s)
BP/GND
ICL7106R, ICL7107R (PDIP)
TOP VIEW
1
OSC 1
2
OSC 2
3
OSC 3
4
TEST
5
6
+
C
REF
C
REF
IN HI
IN LO
A-Z
BUFF
INT
C3
A3
G3
7
-
8
9
10
11
12
13
14
15
V-
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
V+
D1
C1
B1
(1’s)
A1
F1
G1
E1
D2
C2
B2
(10’s)
A2
F2
E2
D3
B3
(100’s)
F3
E3
(1000) AB4
POL
(MINUS)
NC
NC
TEST
OSC 3
NC
OSC 2
OSC 1
V+
D1
C1
B1
ICL7106, ICL7107 (MQFP)
TOP VIEW
+
-
REF
REF
C
REF HI
REF LO
44 43 42 41 40
1
2
3
4
5
6
7
8
9
10
11
12 13 14 15 16 17
A1 F1 G1 E1 D2 C2
COMMON
C
39 38 37 36 35 34
IN HI
IN LO
A-Z
BUFF
B2 A2 F2 E2 D3
INT
V-
33
32
31
30
29
28
27
26
25
24
23
2221201918
NC
G2
C3
A3
G3
BP/GND
POL
AB4
E3
F3
B3
2
ICL7106, ICL7107, ICL7106S, ICL7107S
Absolute Maximum Ratings Thermal Information
Supply Voltage
ICL7106, V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
ICL7107, V+ to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
ICL7107, V- to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-9V
Analog Input Voltage (Either Input) (Note 1). . . . . . . . . . . . . V+ to V-
Reference Input Voltage (Either Input) . . . . . . . . . . . . . . . . . V+ to V-
Clock Input
ICL7106 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TEST to V+
ICL7107 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .GND to V+
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 70oC
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. θJA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications (Note 3)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SYSTEM PERFORMANCE
Thermal Resistance (Typical, Note 2) θJA (oC/W)
PDIP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
MQFP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
(MQFP - Lead Tips Only)
Zero Input Reading VIN = 0.0V, Full Scale = 200mV -000.0 ±000.0 +000.0 Digital
Reading
Stability (Last Digit) (ICL7106S, ICL7107S
Only)
Ratiometric Reading VlN = V
Rollover Error -VIN = +VlN≅ 200mV
Linearity Full Scale = 200mV or Full Scale = 2V Maximum
Common Mode Rejection Ratio VCM = 1V, VIN = 0V, Full Scale = 200mV (Note 6) - 50 - µV/V
Noise VIN = 0V, Full Scale = 200mV
Leakage Current Input VlN = 0 (Note 6) - 1 10 pA
Zero Reading Drift VlN = 0, 0oC To 70oC (Note 6) - 0.2 1 µV/oC
Scale Factor Temperature Coefficient VIN = 199mV, 0oC To 70oC,
End Power Supply Character V+ Supply
Current
End PowerSupply Character V-Supply Current ICL7107 Only - 0.6 1.8 mA
Fixed Input Voltage (Note 7) -000.0 ±000.0 +000.0 Digital
Reading
, V
REF
Difference in Reading for Equal Positive and
Negative Inputs Near Full Scale
Deviation from Best Straight Line Fit (Note 6)
(Peak-To-Peak Value Not Exceeded 95% of Time)
(Ext. Ref. 0ppm/oC) (Note 6)
VIN=0(DoesNotIncludeLED Current for ICL7107) - 1.0 1.8 mA
= 100mV 999 999/10001000 Digital
REF
- ±0.2 ±1 Counts
- ±0.2 ±1 Counts
-15- µV
- 1 5 ppm/oC
Reading
COMMON Pin Analog Common Voltage 25kΩ Between Common and
Positive Supply (With Respect to + Supply)
Temperature Coefficient of Analog Common 25kΩ Between Common and
Positive Supply (With Respect to + Supply)
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
2.4 3.0 3.2 V
- 80 - ppm/oC
ICL7106, ICL7107, ICL7106S, ICL7107S
Electrical Specifications (Note 3) (Continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DISPLAY DRIVER ICL7107 ONLY
Segment Sinking Current V+ = 5V, Segment Voltage = 3V
(Except Pins 19 and 20) 58- mA
Pin 19 Only 10 16 - mA
Pin 20 Only 47- mA
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 TA=25oC, f
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.
= 48kHz. ICL7106 is tested in the
CLOCK
Typical Applications and Test Circuits
+ -
R
C
+
REF
C
5
1
-
REF
COM
C
R
1
R
C
4
OSC 3
TEST
4
REF HI
REF LO
R
3
4039383736353433323130
OSC 1
OSC 2
ICL7106
V+
D1C1B1
123456789
A1F1G1E1D2C2B2
DISPLAY
IN
C
5
C
2
IN HI
IN LO
101112
9V
+
-
R
2
C
3
28
29
27262524232221
V-
INT
A-Z
BUFF
F2
E2
A2
D3
13
14151617181920
DISPLAY
G2
B3
C1 = 0.1µF
= 0.47µF
C
2
= 0.22µF
C
C3
A3
G3
BP
F3
E3
AB4
POL
3
C
= 100pF
4
= 0.02µF
C
5
= 24kΩ
R
1
R
= 47kΩ
2
= 100kΩ
R
3
= 1kΩ
R
4
R
= 1MΩ
5
FIGURE 1. ICL7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
+5V -5V
R
1
C
R
C
4
OSC 3
TEST
4
REF HI
REF LO
F1
+
C
R
3
4039383736353433323130
OSC 1
OSC 2
V+D1C1B1A1
123456789
+ -
IN
R
5
C
5
R
2
REF
COM
IN HI
C
IN LO
1
-
REF
C
C
2
3
28
29
27262524232221
INT
A-Z
BUFF
V-
G2
ICL7107
E1D2C2B2A2F2E2D3B3F3E3
G1
101112
DISPLAY
13
14151617181920
DISPLAY
C3
C1 = 0.1µF
= 0.47µF
C
2
= 0.22µF
C
A3
G3
GND
AB4
POL
3
C
= 100pF
4
= 0.02µF
C
5
= 24kΩ
R
1
R
= 47kΩ
2
= 100kΩ
R
3
= 1kΩ
R
4
R
= 1MΩ
5
FIGURE 2. ICL7107 TEST CIRCUIT AND TYPICAL APPLICATION WITH LED DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
4
ICL7106, ICL7107, ICL7106S, ICL7107S
Design Information Summary Sheet
• OSCILLATOR FREQUENCY
= 0.45/RC
f
OSC
C
> 50pF; R
OSC
f
(Typ) = 48kHz
OSC
• OSCILLATOR PERIOD
= RC/0.45
t
OSC
• INTEGRATION CLOCK FREQUENCY
CLOCK
= f
OSC
f
• INTEGRATION PERIOD
= 1000 x (4/f
t
INT
• 60/50Hz REJECTION CRITERION
t
INT/t60Hz
or t
• OPTIMUM INTEGRATION CURRENT
= 4µA
I
INT
• FULL SCALE ANALOG INPUT VOLTAGE
(Typ) = 200mV or 2V
V
lNFS
• INTEGRATE RESISTOR
V
R
INT
---------------- -=
I
INFS
INT
• INTEGRATE CAPACITOR
t
()I
C
INT
INT
--------------------------------=
V
INT
• INTEGRATOR OUTPUT VOLTAGE SWING
t
()I
()
V
•V
INT
INT
INT
--------------------------------=
C
INT
MAXIMUM SWING:
(V- + 0.5V) < V
> 50kΩ
OSC
/4
)
OSC
lNT/t60Hz
()
INT
INT
INT
= Integer
< (V+ - 0.5V), V
(Typ) = 2V
INT
• DISPLAY COUNT
V
IN
COUNT 1000
×=
---------------
V
REF
• CONVERSION CYCLE
t
CYC
t
CYC
when f
= t
= t
OSC
CL0CK
x 16,000
OSC
= 48kHz; t
x 4000
CYC
= 333ms
• COMMON MODE INPUT VOLTAGE
(V- + 1V) < V
< (V+ - 0.5V)
lN
• AUTO-ZERO CAPACITOR
0.01µF < C
AZ
< 1µF
• REFERENCE CAPACITOR
0.1µF < C
•V
COM
REF
< 1µF
Biased between Vi and V-.
COM
≅ V+ - 2.8V
•V
Regulation lost when V+ to V- < ≅6.8V
If V
the V
is externally pulled down to (V+ to V-)/2,
COM
circuit will turn off.
COM
• ICL7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
≅ V+ - 4.5V
V
GND
• 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
TOTAL CONVERSION TIME = 4000 x t
5
DE-INTEGRATE PHASE
= 16,000 x t
CLOCK
0 - 1999 COUNTS
OSC
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