19-0960; Rev 2; 1/00
Chopper-Stabilized Op Amps
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
10µV max offset voltage, a 0.1µV/°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.
Features
o
ICL7650/53 are Improved Second Sources to
ICL7650B/53B
o
Lower Supply Current: 2mA
o
Low Offset Voltage: 1µV
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
Ordering Information
PART
ICL7650CSA
ICL7650CSD
ICL7650CPA
ICL7650CPD
ICL7650CTV
ICL7650C/D
ICL7650IJA
ICL7650IJD
ICL7650MTV
ICL7650MJD
ICL7650BCSA
ICL7650BCSD
ICL7650BCPA
ICL7650BCPD
ICL7650BCTV
ICL7650BC/D
ICL7653CSA
ICL7653CPA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-20°C to +85°C
-20°C to +85°C
-55°C to +125°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-20°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 SO
14 SO
8 Plastic DIP
14 Plastic DIP
8 TO-99
Dice
8 CERDIP
14 CERDIP
8 CERDIP
14 CERDIP
8 SO
14 SO
8 Plastic DIP
14 Plastic DIP
8 TO-99
Dice
8 SO
8 Plastic DIP
8 TO-99
8 CERDIP
8 CERDIP
8 SO
8 Plastic DIP
8 TO-99
Applications
Condition Amplifier
Precision Amplifier
Instrumentation Amplifier
Thermocouples
Thermistors
Strain Gauges
Typical Operating Circuit
CLAMP
INPUT
OUTPUT
ICL7650
ICL7653
R
C
INVERTING AMPLIFIER
WITH OPTIONAL CLAMP
C
ICL7653CTV
ICL7653IJA
ICL7653MTV
ICL7653BCSA
ICL7653BCPA
ICL7653BCTV
Pin Configurations appear at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.
Chopper-Stabilized Op Amps
ICL7650/ICL7650B/ICL7653/ICL7653B
ABSOLUTE MAXIMUM RATINGS
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)...................100µA
Continuous Total Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
8-Pin PDIP (derate 6.9mW/°C above +70°C)...............552mW
8-Pin CERDIP (derate 8.0mW/°C above +70°C).........640mW
8-Pin TO-99 (derate 6.7mW/°C above +70°C)............533mW
14-Pin SO (derate 8.3mW/°C above +70°C)...............667mW
14-Pin PDIP (derate 10.0mW/°C above +70°C)..........800mW
14-Pin CERDIP (derate 9.1mW/°C above +70°C).......727mW
Operating Temperature Ranges
ICL765_C_ _/ICL755_BC_ _ ...............................0°C to +70°C
ICL765_I_ _/ICL755_BI_ _................................-20°C to +85°C
ICL765_M_ _/ICL755_BM_ _..........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Maxim recommends limiting the input current to 100µA to avoid latchup problems. A value of 1mA is typically safe; however,
this is not guaranteed.
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.
ELECTRICAL CHARACTERISTICS—ICL7650B/ICL7653B
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Input Offset Voltage
Average Temperature Coefficient
of Input Offset Voltage
Input Bias Current
Input Offset Current (Note 2)
Input Resistance
Large-Signal Voltage Gain
Output Voltage Swing (Note 3)
Common-Mode Voltage Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Input Noise Voltage
Input Noise Current
Unity-Gain Bandwidth
Slew Rate
Rise Time
Overshoot
Operating Supply Range
Supply Current
V+ to V-
I
SUPP
No load
4.5
2.0
SYMBOL
T
A
= +25°C
V
OS
∆V
OS
∆T
I
BIAS
I
OS
R
IN
A
VOL
V
OUT
CMVR
CMRR
PSRR
e
np-p
I
n
GBW
SR
t
r
C
L
= 50pF, R
L
= 10kΩ
CMVR = -5V to +1.6V
V+ to V- = ±3V to ±8V
R
S
= 100Ω, f = 0 to 10Hz
f = 10Hz
R
L
= 10kΩ
R
L
= 10kΩ
R
L
= 100kΩ
120
120
1
·
10
5
±4.7
-55°C < T
A
< +85°C
-55°C < T
A
< +125°C
T
A
= +25°C
-20°C < T
A
< +85°C
T
A
= +25°C
Doubles every 10°
T
A
= +25°C
0°C < T
A
< +70°C
-20°C < T
A
< +85°C
50
0.01
1.5
35
100
0.5
10
12
5
·
10
8
±4.85
±4.95
-5.0 -5.2 to +2.0
130
130
2
0.01
2.0
2.5
0.2
20
16
3.5
1.6
pA
Ω
V/V
V
V
dB
dB
µVp-p
pA/√Hz
MHz
V/µs
µs
%
V
mA
0.05
10
pA
CONDITIONS
MIN
TYP
±0.7
±10
5.0
µV/°C
MAX
±5
µV
UNITS
2
_______________________________________________________________________________________
Chopper-Stabilized Op Amps
ELECTRICAL CHARACTERISTICS—ICL7650B/ICL7653B (continued)
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Internal Chopping Frequency
Clamp On Current (Note 4)
Clamp Off Current (Note 4)
Offset Voltage vs. Time
Note 2:
Note 3:
Note 4:
SYMBOL
f
ch
CONDITIONS
Pins 12–14 open (DIP)
R
L
= 100kΩ
-4.0V < V
OUT
< +4.0V
No load
MIN
120
25
TYP
200
70
1
100
MAX
375
200
UNITS
Hz
µA
pA
nV/
√month
ICL7650/ICL7650B/ICL7653/ICL7653B
I
OS
= 2
·
I
BIAS
OUTPUT and CLAMP pins not connected.
See
Output Clamp
section for details.
ELECTRICAL CHARACTERISTICS—ICL7650/ICL7653
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.) (Note 5)
PARAMETER
SYMBOL
T
A
= +25°C
Input Offset Voltage
V
OS
ICL765_
(Note 6)
CONDITIONS
ICL765_
ICL765_B
0°C
≤
T
A
≤
+70°C
-20°C
≤
T
A
≤
+85°C
-55°C
≤
T
A
≤
+125°C
0°C
≤
T
A
≤
+70°C
ICL765_
-20°C
≤
T
A
≤
+85°C
-55°C
≤
T
A
≤
+85°C
+85°C
≤
T
A
≤
+125°C
T
A
= +25°C
Input Bias Current
I
B
ICL765_
Input Resistance
R
IN
R
L
= 10kΩ, T
A
= +25°C
Large-Signal Voltage Gain
A
VOL
0°C
≤
T
A
≤
+70°C
-20°C
≤
T
A
≤
+85°C
-55°C
≤
T
A
≤
+125°C
Output Voltage Swing (Note 3)
V
OUT
R
L
= 10kΩ
R
L
= 100kΩ
0°C
≤
T
A
≤
+70°C
Common-Mode Voltage Range
CMVR
-20°C
≤
T
A
≤
+85°C
-55°C
≤
T
A
≤
+125°C
1
·
10
8
0.5
·
10
8
0.5
·
10
8
0.2
·
10
8
±4.7
±4.85
±4.95
-5.0 -5.2 to +3.0
-5.0 -5.2 to +3.0
-4.5 -4.0 to +3.0
2.5
2.5
2.5
V
ICL765_
ICL765_B
0°C
≤
T
A
≤
+70°C
-20°C
≤
T
A
≤
+85°C
-55°C
≤
T
A
≤
+125°C
MIN
TYP
±0.7
±1.0
±1.0
±1.0
±10
0.01
0.01
0.01
0.01
0.25
4
12
20
50
0.3
10
12
5
·
10
8
V/V
MAX
±5.0
±10
±10
±10
±50
0.05
0.1
0.05
0.05
1.5
10
20
100
200
10
Ω
pA
µV/°C
µV
UNITS
ICL765_B, 0°C
≤
T
A
≤
+70°C
Average Temperature Coefficient
of Input Offset Voltage (Note 6)
∆V
OS
∆T
V
_______________________________________________________________________________________
3
Chopper-Stabilized Op Amps
ICL7650/ICL7650B/ICL7653/ICL7653B
ELECTRICAL CHARACTERISTICS—ICL7650/ICL7653 (continued)
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.) (Note 5)
PARAMETER
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Input Noise Voltage
Input Noise Current
Unity-Gain Bandwidth
Slew Rate
Rise Time
Overshoot
Operating Supply Range
Supply Current
Internal Chopping Frequency
Clamp On Current (Note 4)
Clamp Off Current (Note 4)
Offset Voltage vs. Time
V+ to V-
I
SUPP
f
CLKOUT
No load
Pins 13 and 14 open (DIP)
R
L
= 100kΩ
-4.0
≤
V
OUT
≤
+4.0V
120
25
4.5
1.2
200
70
1
100
SYMBOL
CMRR
PSRR
e
np-p
I
n
GBW
SR
t
r
C
L
= 50pF, R
L
= 10kΩ
CONDITIONS
CMVR = -5V to +2.5V
V+ to V- = ±3V to ±8V
R
S
= 100Ω, f = 0 to 10Hz
f = 10Hz
MIN
120
120
TYP
130
130
2
0.01
2.0
2.5
0.2
20
16
2.0
375
200
MAX
UNITS
dB
dB
µVp-p
pA/√Hz
MHz
V/µs
µs
%
V
mA
Hz
µA
pA
nV/
√month
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.
Typical Operating Characteristics
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT
vs. SUPPLY VOLTAGE
ICL7650toc01
CLOCK RIPPLE REFERRED TO INPUT
vs. TEMPERATURE
ICL7650toc02
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
ICL7650toc03
4
MAXIMUM OUTPUT CURRENT (mA)
3
2
1
0
-10
-20
-30
2
4
6
8
10
12
14
SINK CURRENT
SOURCE CURRENT
1k
0.1µF
CLOCK RIPPLE (µVp-p)
100
BROADBAND
NOISE
(A
V
= 1000)
1
1µF
3
SUPPLY CURRENT (mA)
150
2
10
1
0.1
16
25
50
75
100
125
TOTAL SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
0
4
6
8
10
12
14
16
TOTAL SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
Chopper-Stabilized Op Amps
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V+ = +5V, V- = -5V, T
A
= +25°C, unless otherwise noted.)
ICL7650/ICL7650B/ICL7653/ICL7653B
SUPPLY CURRENT vs.
AMBIENT TEMPERATURE
ICL7650toc04
COMMON-MODE INPUT VOLTAGE RANGE
vs. SUPPLY VOLTAGE
ICL7650toc05
COMMON-MODE INPUT VOLTAGE RANGE (V)
3
8
7
6
NEGATIVE LIMIT
5
4
3
POSITIVE LIMIT
2
1
0
0
1
2
3
4
5
6
7
8
INPUT OFFSET VOLTAGE
vs. CHOPPING FREQUENCY
ICL7650toc06
-10
SUPPLY CURRENT (mA)
-8
OFFSET VOLTAGE (µV)
2
-6
1
-4
-2
0
-50
-25
0
25
50
75
100
125
AMBIENT TEMPERATURE (°C)
0
10
100
1k
10k
CHOPPING FREQUENCY (CLOCK OUT) (Hz)
SUPPLY VOLTAGE (V)
INPUT OFFSET VOLTAGE CHANGE
vs. SUPPLY VOLTAGE
ICL7650toc07
10Hzp-p NOISE VOLTAGE
vs. CHOPPING FREQUENCY
DC TO 10Hz P-P NOISE VOLTAGE (µV)
ICL7650toc08
OPEN-LOOP GAIN AND PHASE SHIFT
vs. FREQUENCY
160
140
120
70
100
90
80
110
60
130
40
R
L
= 10kΩ
C
EXT
= 0.1µF
0.01
0.1
1
10
100
1k
10k
100k
PHASE SHIFT (DEGREES)
50
OPEN-LOOP GAIN (dB)
ICL7650toac09
-3
INPUT OFFSET VOLTAGE CHANGE (µV)
-2
-1
0
1
2
3
4
6
8
10
12
14
5
4
3
2
1
0
16
10
100
1k
10k
TOTAL SUPPLY VOLTAGE (V)
CHOPPING FREQUENCY (CLOCK-OUT) (Hz)
20
FREQUENCY (Hz)
OPEN-LOOP GAIN AND PHASE SHIFT
vs. FREQUENCY
160
140
PHASE SHIFT (DEGREES)
OUTPUT VOLTAGE (V)
50
OPEN-LOOP GAIN (dB)
120
70
100
90
80
110
60
130
40
20
0.01
0.1
1
10
100
1k
10k
100k
FREQUENCY (Hz)
R
L
= 10kΩ
C
EXT
= 1.0µF
-2
-3
ICL7650toac10
VOLTAGE FOLLOWER LARGE-SIGNAL
PULSE RESPONSE
ICL7650toc11
VOLTAGE FOLLOWER LARGE-SIGNAL
PULSE RESPONSE
ICL7650toc12
3
2
CLOCK OUT LOW
1
0
-1
CLOCK OUT HIGH
3
2
OUTPUT VOLTAGE (V)
1
0
-1
-2
-3
CLOCK OUT HIGH
CLOCK OUT LOW
-1.0 -0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
-1.0 -0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
TIME (µs)
TIME (µs)
_______________________________________________________________________________________
5
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