General Description
Maxim's ICL7650/ICL7653 are chopper-stabilized
amplifiers, ideal for low-level signal processing applica-
tions. Featuring high performance and versatility, these
devices combine low input offset voltage, low input bias
current, wide bandwidth, and exceptionally low drift
over time and temperature. Low offset is achieved
through a nulling scheme that provides continuous
error correction. A nulling amplifier alternately nulls
itself and the main amplifier. The result is an input offset
voltage that is held to a minimum over the entire operat-
ing temperature range.
The ICL7650B/ICL7653B are exact replacements for
Intersil's ICL7650B/ICL7653B. These devices have a
10V max offset voltage, a 0.1V/C max input offset
voltage temperature coefficient, and a 20pA max bias
current--all specified over the commercial temperature
range.
A 14-pin version is available that can be used with
either an internal or external clock. The 14-pin version
has an output voltage clamp circuit to minimize over-
load recovery time.
Applications
Condition Amplifier
Precision Amplifier
Instrumentation Amplifier
Thermocouples
Thermistors
Strain Gauges
Features
o ICL7650/53 are Improved Second Sources to
ICL7650B/53B
o Lower Supply Current: 2mA
o Low Offset Voltage: 1V
o No Offset Voltage Trimming Needed
o High-Gain CMRR and PSRR: 120dB min
o Lower Offset Drift with Time and Temperature
o Extended Common-Mode Voltage Range
o Low DC Input Bias Current: 10pA
o Monolithic, Low-Power CMOS Design
ICL7650/ICL7650B/ICL7653/ICL7653B
Chopper-Stabilized Op Amps
________________________________________________________________ Maxim Integrated Products
1
ICL7650
ICL7653
OUTPUT
INVERTING AMPLIFIER
WITH OPTIONAL CLAMP
INPUT
C
R
C
CLAMP
Typical Operating Circuit
19-0960; Rev 2; 1/00
Pin Configurations appear at end of data sheet.
Ordering Information
PART
ICL7650CSA
ICL7650CSD
ICL7650CPA
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
8 SO
14 SO
8 Plastic DIP
ICL7650CPD
ICL7650CTV
ICL7650C/D
0C to +70C
0C to +70C
0C to +70C
14 Plastic DIP
8 TO-99
Dice
ICL7650IJA
ICL7650IJD
-20C to +85C
-20C to +85C
8 CERDIP
14 CERDIP
ICL7650MTV
ICL7650MJD
-55C to +125C
-55C to +125C
8 CERDIP
14 CERDIP
ICL7650BCSA
ICL7650BCSD
0C to +70C
0C to +70C
8 SO
14 SO
ICL7650BCPA
ICL7650BCPD
0C to +70C
0C to +70C
8 Plastic DIP
14 Plastic DIP
ICL7650BCTV
ICL7650BC/D
0C to +70C
0C to +70C
8 TO-99
Dice
ICL7653CSA
ICL7653CPA
ICL7653CTV
0C to +70C
8 SO
ICL7653BCSA
ICL7653BCPA
0C to +70C
0C to +70C
8 Plastic DIP
8 TO-99
0C to +70C
ICL7653IJA
ICL7653MTV
-55C to +125C
-20C to +85C
8 CERDIP
8 CERDIP
0C to +70C
8 SO
8 Plastic DIP
ICL7653BCTV
0C to +70C
8 TO-99
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
ICL7650/ICL7650B/ICL7653/ICL7653B
Chopper-Stabilized Op Amps
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--ICL7650B/ICL7653B
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25C, unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Total Supply Voltage (V+ to V-)..............................................18V
Input Voltage ........................................(V+ + 0.3V) to (V- - 0.3V)
Voltage on Oscillator Control Pins
(except EXT/CLOCK IN).............................................V+ to V-
Voltage on EXT/CLOCK IN ..................(V+ + 0.3V) to (V+ - 6.0V)
Duration of Output Short Circuit ....................................Indefinite
Current into Any Pin ............................................................10mA
Current into Any Pin while Operating (Note 1)...................100A
Continuous Total Power Dissipation (T
A
= +70C)
8-Pin SO (derate 5.88mW/C above +70C)...............471mW
8-Pin PDIP (derate 6.9mW/C above +70C)...............552mW
8-Pin CERDIP (derate 8.0mW/C above +70C).........640mW
8-Pin TO-99 (derate 6.7mW/C above +70C)............533mW
14-Pin SO (derate 8.3mW/C above +70C)...............667mW
14-Pin PDIP (derate 10.0mW/C above +70C)..........800mW
14-Pin CERDIP (derate 9.1mW/C above +70C).......727mW
Operating Temperature Ranges
ICL765_C_ _/ICL755_BC_ _ ...............................0C to +70C
ICL765_I_ _/ICL755_BI_ _................................-20C to +85C
ICL765_M_ _/ICL755_BM_ _..........................-55C to +125C
Storage Temperature Range .............................-65C to +150C
Junction Temperature ......................................................+150C
Lead Temperature (soldering, 10s) .................................+300C
C
L
= 50pF, R
L
= 10k
f = 10Hz
R
S
= 100
, f = 0 to 10Hz
V+ to V- = 3V to 8V
CMVR = -5V to +1.6V
R
L
= 100k
R
L
= 10k
R
L
= 10k
Doubles every 10
-20C < T
A
< +85C
T
A
= +25C
-55C < T
A
< +85C
-55C < T
A
< +125C
T
A
= +25C
T
A
= +25C
CONDITIONS
s
0.2
t
r
Rise Time
V/s
2.5
SR
Slew Rate
MHz
2.0
GBW
Unity-Gain Bandwidth
pA/
Hz
0.01
I
n
Input Noise Current
Vp-p
2
e
np-p
Input Noise Voltage
dB
120
130
PSRR
Power-Supply Rejection Ratio
dB
120
130
CMRR
Common-Mode Rejection Ratio
V
-5.0 -5.2 to +2.0
1.6
CMVR
Common-Mode Voltage Range
4.95
V
4.7
4.85
V
OUT
Output Voltage Swing (Note 3)
V/V
1
10
5
5
10
8
A
VOL
Large-Signal Voltage Gain
10
12
R
IN
Input Resistance
pA
0.5
I
OS
Input Offset Current (Note 2)
100
35
pA
1.5
10
I
BIAS
Input Bias Current
0.01
0.05
V
0.7
5
V
OS
Input Offset Voltage
10
5.0
V/C
50
V
OS
T
Average Temperature Coefficient
of Input Offset Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Note 1: Maxim recommends limiting the input current to 100A to avoid latchup problems. A value of 1mA is typically safe; however,
this is not guaranteed.
T
A
= +25C
0C < T
A
< +70C
-20C < T
A
< +85C
%
20
Overshoot
V
4.5
16
V+ to V-
Operating Supply Range
No load
mA
2.0
3.5
I
SUPP
Supply Current
ICL7650/ICL7650B/ICL7653/ICL7653B
Chopper-Stabilized Op Amps
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--ICL7650/ICL7653
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25C, unless otherwise noted.) (Note 5)
ELECTRICAL CHARACTERISTICS--ICL7650B/ICL7653B (continued)
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25C, unless otherwise noted.)
Note 2: I
OS
= 2
I
BIAS
Note 3: OUTPUT and CLAMP pins not connected.
Note 4: See Output Clamp section for details.
CONDITIONS
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
-4.0V < V
OUT
< +4.0V
pA
1
Clamp Off Current (Note 4)
No load
nV/
month
100
Offset Voltage vs. Time
0C
T
A
+70C
-20C
T
A
+85C
-55C
T
A
+125C
0C
T
A
+70C
R
L
= 100k
R
L
= 10k
-55C
T
A
+125C
ICL765_
T
A
= +25C
ICL765_
(Note 6)
CONDITIONS
V
-5.0 -5.2 to +3.0
2.5
CMVR
Common-Mode Voltage Range
4.95
V
4.7
4.85
V
OUT
Output Voltage Swing (Note 3)
0.2
10
8
10
12
R
IN
Input Resistance
0.3
10
50
200
20
100
10
50
V
0.7
5.0
V
OS
Input Offset Voltage
1.0
10
1.0
10
1.0
10
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
ICL765_
ICL765_B, 0C
T
A
+70C
0.01
0.1
V/C
0.01
0.05
V
OS
T
Average Temperature Coefficient
of Input Offset Voltage (Note 6)
ICL765_
ICL765_B
0C
T
A
+70C
-20C
T
A
+85C
-55C
T
A
+125C
0.01
0.05
0.01
0.05
0.25
1.5
T
A
= +25C
4
10
pA
I
B
Input Bias Current
12
20
ICL765_B
ICL765_
R
L
= 10k
, T
A
= +25C
V/V
1
10
8
5
10
8
A
VOL
Large-Signal Voltage Gain
0C
T
A
+70C
0.5
10
8
-20C
T
A
+85C
0.5
10
8
-20C
T
A
+85C
-5.0 -5.2 to +3.0
2.5
-55C
T
A
+125C
-4.5 -4.0 to +3.0
2.5
0C
T
A
+70C
-20C
T
A
+85C
-55C
T
A
+85C
+85C
T
A
+125C
R
L
= 100k
A
25
70
200
Clamp On Current (Note 4)
Pins 1214 open (DIP)
Hz
120
200
375
f
ch
Internal Chopping Frequency
-30
-10
-20
1
0
3
2
4
2
6
8
4
10
12
14
16
MAXIMUM OUTPUT CURRENT
vs. SUPPLY VOLTAGE
ICL7650toc01
TOTAL SUPPLY VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
SOURCE CURRENT
SINK CURRENT
1k
100
10
1
0.1
25
75
50
100
125
150
CLOCK RIPPLE REFERRED TO INPUT
vs. TEMPERATURE
ICL7650toc02
TEMPERATURE (
C)
CLOCK RIPPLE (
Vp-p)
BROADBAND
NOISE
(A
V
= 1000)
0.1
F
1
F
0
1
2
3
4
8
10
6
12
14
16
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
ICL7650toc03
TOTAL SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
Typical Operating Characteristics
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25C, unless otherwise noted.)
ICL7650/ICL7650B/ICL7653/ICL7653B
Chopper-Stabilized Op Amps
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS--ICL7650/ICL7653 (continued)
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25C, unless otherwise noted.) (Note 5)
C
L
= 50pF, R
L
= 10k
f = 10Hz
R
S
= 100
, f = 0 to 10Hz
V+ to V- = 3V to 8V
CMVR = -5V to +2.5V
%
CONDITIONS
s
0.2
t
r
Rise Time
V/s
2.5
SR
Slew Rate
MHz
2.0
GBW
Unity-Gain Bandwidth
pA/
Hz
0.01
I
n
Input Noise Current
Vp-p
2
e
np-p
Input Noise Voltage
dB
120
130
PSRR
Power-Supply Rejection Ratio
dB
120
130
CMRR
Common-Mode Rejection Ratio
20
Overshoot
V
4.5
16
V+ to V-
Operating Supply Range
No load
mA
1.2
2.0
I
SUPP
Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Pins 13 and 14 open (DIP)
Hz
120
200
375
f
CLKOUT
Internal Chopping Frequency
R
L
= 100k
A
25
70
200
Clamp On Current (Note 4)
-4.0
V
OUT
+4.0V
pA
1
Clamp Off Current (Note 4)
nV/
month
100
Offset Voltage vs. Time
Note 3: OUTPUT and CLAMP pins not connected.
Note 4: See Output Clamp section for details.
Note 5: All pins are designed to withstand electrostatic discharge (ESD) levels in excess of 2000V (MIL STD 8838 Method 3015.1
test circuit).
Note 6: Sample tested. Limits are not used to calculate outgoing quality level.
ICL7650/ICL7650B/ICL7653/ICL7653B
Chopper-Stabilized Op Amps
_______________________________________________________________________________________
5
0
1
2
3
-50
25
50
-25
0
75
100
125
SUPPLY CURRENT vs.
AMBIENT TEMPERATURE
ICL7650toc04
AMBIENT TEMPERATURE (C)
SUPPLY CURRENT (mA)
0
2
1
4
3
5
6
7
8
0
2
3
1
4
5
6
7
8
COMMON-MODE INPUT VOLTAGE RANGE
vs. SUPPLY VOLTAGE
ICL7650toc05
SUPPLY VOLTAGE (V)
COMMON-MODE INPUT VOLTAGE RANGE (V)
POSITIVE LIMIT
NEGATIVE LIMIT
0
-2
-6
-4
-8
-10
10
100
1k
10k
INPUT OFFSET VOLTAGE
vs. CHOPPING FREQUENCY
ICL7650toc06
CHOPPING FREQUENCY (CLOCK OUT) (Hz)
OFFSET VOLTAGE (
V)
3
1
2
-1
0
-2
-3
4
8
10
6
12
14
16
INPUT OFFSET VOLTAGE CHANGE
vs. SUPPLY VOLTAGE
ICL7650toc07
TOTAL SUPPLY VOLTAGE (V)
INPUT OFFSET VOLTAGE CHANGE (
V)
0
1
3
2
4
5
10
100
1k
10k
10Hzp-p NOISE VOLTAGE
vs. CHOPPING FREQUENCY
ICL7650toc08
CHOPPING FREQUENCY (CLOCK-OUT) (Hz)
DC TO 10Hz P-P NOISE VOLTAGE (
V)
20
60
40
100
80
140
120
160
0.01
1
10
0.1
100
1k
10k
100k
OPEN-LOOP GAIN AND PHASE SHIFT
vs. FREQUENCY
ICL7650toac09
FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
110
130
70
90
50
PHASE SHIFT (DEGREES)
R
L
= 10k
C
EXT
= 0.1
F
20
60
40
100
80
140
120
160
0.01
1
10
0.1
100
1k
10k
100k
OPEN-LOOP GAIN AND PHASE SHIFT
vs. FREQUENCY
ICL7650toac10
FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
110
130
70
90
50
PHASE SHIFT (DEGREES)
R
L
= 10k
C
EXT
= 1.0
F
-3
-2
-1
0
1
2
3
-1.0
0
-0.5
0.5
1.0
1.5
2.0
2.5
3.0
VOLTAGE FOLLOWER LARGE-SIGNAL
PULSE RESPONSE
ICL7650toc11
TIME (
s)
OUTPUT VOLTAGE (V)
CLOCK OUT HIGH
CLOCK OUT LOW
-3
-2
-1
0
1
2
3
-1.0
0
-0.5
0.5
1.0
1.5
2.0
2.5
3.0
VOLTAGE FOLLOWER LARGE-SIGNAL
PULSE RESPONSE
ICL7650toc12
TIME (
s)
OUTPUT VOLTAGE (V)
CLOCK OUT HIGH
CLOCK OUT LOW
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25C, unless otherwise noted.)
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