1
TM
File Number
2920.5
ICL7650S
2MHz, Super Chopper-Stabilized
Operational Amplifier
The ICL7650S Super Chopper-Stabilized Amplifier offers
exceptionally low input offset voltage and is extremely stable
with respect to time and temperature. It is a direct
replacement for the industry-standard ICL7650 offering
improved
input offset voltage,
lower
input offset voltage
temperature coefficient,
reduced
input bias current, and
wider
common mode voltage range. All improvements are
highlighted in
bold italics
in the Electrical Characteristics
section.
Critical parameters are guaranteed over the
entire commercial temperature range.
Intersil’s unique CMOS chopper-stabilized amplifier circuitry
is user-transparent, virtually eliminating the traditional
chopper amplifier problems of intermodulation effects,
chopping spikes, and overrange lockup.
The chopper amplifier achieves its low offset by comparing
the inverting and non-inverting input voltages in a nulling
amplifier, nulled by alternate clock phases. Two external
capacitors are required to store the correcting potentials on
the two amplifier nulling inputs; these are the only external
components necessary.
The clock oscillator and all the other control circuitry is
entirely self-contained. However the 14 lead version includes
a provision for the use of an external clock, if required for a
particular application. In addition, the ICL7650S is internally
compensated for unity-gain operation.
Features
Guaranteed
Max Input Offset Voltage for
All
Temperature
Ranges
Low Long-Term and Temperature Drifts of Input Offset
Voltage
Guaranteed
Max Input Bias Current. . . . . . . . . . . . . .10pA
Extremely Wide
Common Mode
Voltage Range. . . . . . . . . . . . . . . . . . . . . . . +3.5V to -5V
Reduced
Supply Current . . . . . . . . . . . . . . . . . . . . . . 2mA
Guaranteed
Minimum Output Source/Sink Current
Extremely High Gain . . . . . . . . . . . . . . . . . . . . . . . .150dB
Extremely High CMRR and PSRR . . . . . . . . . . . . . .140dB
High Slew Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . .2.5V/
μ
s
Wide Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2MHz
Unity-Gain Compensated
Clamp Circuit to Avoid Overload Recovery Problems and
Allow Comparator Use
Extremely Low Chopping Spikes at Input and Output
Improved, Direct
Replacement for Industry-Standard
ICL7650 and other Second-Source Parts
Pinouts
Ordering Information
PART NUMBER
TEMP.
RANGE
(
o
C)
PACKAGE
PKG.
NO.
ICL7650SCPA-1
0 to 70
8 Ld PDIP
E8.3
ICL7650SCPD
0 to 70
14 Ld PDIP
E14.3
ICL7650SCBA-1
0 to 70
8 Ld SOIC
M8.15
ICL7650SCTV-1
0 to 70
8 Pin Metal Can
T8.C
ICL7650S (PDIP, SOIC)
TOP VIEW
ICL7650S (METAL CAN)
TOP VIEW
ICL7650S (PDIP)
TOP VIEW
C
EXTA
-IN
+IN
V-
1
2
3
4
8
7
6
5
C
EXTB
V+
OUTPUT
C
RETN
-
+
C
EXTB
OUTPUT
-IN
V-
C
EXTA
+IN
V+/CASE
C
RETN
2
4
6
1
3
7
5
8
-
+
C
EXTB
C
EXTA
NC (GUARD)
-IN
+IN
NC (GUARD)
V-
INT/EXT
EXT CLK IN
INT CLK OUT
V+
OUTPUT
OUT CLAMP
C
RETN
1
2
3
4
5
6
7
14
13
12
11
10
9
8
-
+
Data Sheet
April 2000
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil and Design is a trademark of Intersil Corporation.
|
Copyright
Intersil Corporation 2000