Intersil Corporation ICL7106, ICL7106S, ICL7107, ICL7107S Datasheet
1
ICL7106, ICL7107,
ICL7106S, ICL7107S
31/2 Digit,
LCD/LED Display, A/D Converters
January 1998
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
P-P
• On Chip Clock and Reference
• Low Power Dissipation - Typically Less Than 10mW
• No Additional Active Circuits Required
• Enhanced Display Stability (ICL7106S, ICL7107S)
Description
The Intersil ICL7106 and ICL7107 are high performance, low
power, 3
1
/2digit A/D converters. Included are seven segment 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/
o
C, input
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.
Ordering Information
PART NO.
TEMP.
RANGE (oC) PACKAGE PKG. 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
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
File Number 3082.2
2
Pinouts
ICL7106, ICL7107 (PDIP)
TOP VIEW
ICL7106R, ICL7107R (PDIP)
TOP VIEW
ICL7106, ICL7107 (MQFP)
TOP VIEW
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
(1000) AB4
POL
28
40
39
38
37
36
35
34
33
32
31
30
29
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
A3
G3
BP/GND
(1’s)
(10’s)
(100’s)
(MINUS)
(100’s)
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
(1000) AB4
POL
28
40
39
38
37
36
35
34
33
32
31
30
29
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
V-
G2 (10’s)
C3
A3
G3
BP/GND
(1’s)
(10’s)
(100’s)
(MINUS)
(100’s)
OSC 2
NC
OSC 3
TEST
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12 13 14 15 16 17
OSC 1
V+
D1
C1
B1
A1 F1 G1 E1 D2 C2
28
27
26
25
24
23
2221201918
B2 A2 F2 E2 D3
B3
F3
E3
AB4
POL
BP/GND
39 38 37 36 35 34
33
32
31
30
29
44 43 42 41 40
IN HI
IN LO
A-Z
BUFF
INT
V-
NC
G2
C3
A3
G3
REF HI
REF LO
C
REF
+
C
REF
-
COMMON
ICL7106, ICL7107, ICL7106S, ICL7107S
3
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
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)
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
Zero Input Reading VIN = 0.0V, Full Scale = 200mV -000.0 ±000.0 +000.0 Digital
Reading
Stability (Last Digit) (ICL7106S, ICL7107S
Only)
Fixed Input Voltage (Note 7) -000.0 ±000.0 +000.0 Digital
Reading
Ratiometric Reading VlN = V
REF
, V
REF
= 100mV 999 999/10001000 Digital
Reading
Rollover Error -VIN = +VlN≅ 200mV
Difference in Reading for Equal Positive and
Negative Inputs Near Full Scale
- ±0.2 ±1 Counts
Linearity Full Scale = 200mV or Full Scale = 2V Maximum
Deviation from Best Straight Line Fit (Note 6)
- ±0.2 ±1 Counts
Common Mode Rejection Ratio VCM = 1V, VIN = 0V, Full Scale = 200mV (Note 6) - 50 - µV/V
Noise VIN = 0V, Full Scale = 200mV
(Peak-To-Peak Value Not Exceeded 95% of Time)
-15- µV
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,
(Ext. Ref. 0ppm/oC) (Note 6)
- 1 5 ppm/oC
End Power Supply Character V+ Supply
Current
VIN=0(DoesNotIncludeLED Current for ICL7107) - 1.0 1.8 mA
End PowerSupply Character V-Supply Current ICL7107 Only - 0.6 1.8 mA
COMMON Pin Analog Common Voltage 25kΩ Between Common and
Positive Supply (With Respect to + Supply)
2.4 3.0 3.2 V
Temperature Coefficient of Analog Common 25kΩ Between Common and
Positive Supply (With Respect to + Supply)
- 80 - ppm/oC
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
ICL7106, ICL7107, ICL7106S, ICL7107S
4
Typical Applications and Test Circuits
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
CLOCK
= 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.
Electrical Specifications (Note 3) (Continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
FIGURE 1. ICL7106TEST CIRCUIT AND TYPICAL APPLICATIONWITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
FIGURE 2. ICL7107TEST CIRCUIT AND TYPICAL APPLICATIONWITH LED DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
13
123456789
101112
14151617181920
28
4039383736353433323130
29
27262524232221
V+
D1C1B1
A1F1G1E1D2C2B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
+
C
REF
COM
IN HI
IN LO
A-Z
BUFF
INT
V-
G2
C3
A3
G3
BP
DISPLAY
DISPLAY
C
1
C
2
C
3
C
4
R
3
R
1
R
4
C
5
+ -
IN
R
5
R
2
9V
ICL7106
C1 = 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
+
-
13
123456789
101112
14151617181920
28
4039383736353433323130
29
27262524232221
V+D1C1B1A1
F1
G1
E1D2C2B2A2F2E2D3B3F3E3
AB4
POL
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
+
C
REF
COM
IN HI
IN LO
A-Z
BUFF
INT
V-
G2
C3
A3
G3
GND
DISPLAY
DISPLAY
C
1
C
2
C
3
C
4
R
3
R
1
R
4
C
5
+ -
IN
R
5
R
2
ICL7107
+5V -5V
C1 = 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
ICL7106, ICL7107, ICL7106S, ICL7107S
5
Typical Integrator Amplifier Output Waveform (INT Pin)
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/t60Hz
or t
lNT/t60Hz
= Integer
• OPTIMUM INTEGRATION CURRENT
I
INT
= 4µA
• FULL SCALE ANALOG INPUT VOLTAGE
V
lNFS
(Typ) = 200mV or 2V
• INTEGRATE RESISTOR
• INTEGRATE CAPACITOR
• INTEGRATOR OUTPUT VOLTAGE SWING
•V
INT
MAXIMUM SWING:
(V- + 0.5V) < V
INT
< (V+ - 0.5V), V
INT
(Typ) = 2V
• DISPLAY COUNT
• 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.
• 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 t
CLOCK
= 16,000 x t
OSC
ICL7106, ICL7107, ICL7106S, ICL7107S
Loading...