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TC901
MONOLITHIC, AUTO-ZEROED OPERATIONAL AMPLIFIER
FEATURES
GENERAL DESCRIPTION
■ Second-Generation Monolithic,
Chopper-Stabilized Op Amp
■ No External Capacitors Required
■ Single-Supply Operation ........... ±15V or 5V to 32V
■ Supply Current............................ 450µA at 15V, Typ
■ Input Offset Voltage ................................... 7µV, Typ
■ Common-Mode Rejection Ratio ............140dB, Typ
■ Open-Loop Gain ............ 140dB Into 10k Load, Typ
■ Input Noise ......................... 5µV at 10Hz Bandwidth
■ Pinout Compatible With ICL7650
The TC901 is a monolithic, auto-zeroed operational
amplifier. It is a second-generation design of the TC91X
CMOS chopper-stabilized op amps with on-chip capacitors.
Elimination of the external capacitors allows the de-
signer to increase reliability, lower cost, and simplify design
by lowering parts count.
Since the TC901 is an auto-zeroing op amp, input offset
voltage is very low. More important, there is almost zero drift
with time. This eliminates production line adjustments, as
well as periodic calibration.
■ Lowest Parts Count Chopper Op Amp
Notable electrical characteristics are low supply cur-
rent (450µA, typical), single-supply operation (5V to 32V),
low input offset voltage (7µV, typical), low noise (<5µVP-P
,
PIN CONFIGURATION (DIP and SOIC)
typical, for a 10Hz bandwidth), and fast recovery from
saturation without the use of external clamp circuitry.
This device is supplied in 8-pin plastic DIP and plastic
SOIC packages. It is pin compatible with bipolar, CMOS,
JFET and other chopper-stabilized op amps using the
industry-standard 741 pinout.
TC901CPA
TC901COA
NC
–INPUT
+INPUT
1
2
3
4
8
7
6
5
NC
–INPUT
+INPUT
1
2
3
4
8
7
6
5
NC
V
NC
V
–
+
–
+
DD
DD
OUTPUT
NC
OUTPUT
NC
ORDERING INFORMATION
V
V
SS
SS
Temperature
NC = NO INTERNAL CONNECTION
Part No.
Package
Range
TC901COA
TC901CPA
8-Pin SOIC
8-Pin Plastic DIP
0°C to +70°C
0°C to +70°C
FUNCTIONAL BLOCK DIAGRAM
V
V
SS
DD
4
7
V
CORRECTION AMPLIFIER
OS
2
+
–INPUT
TC901
–
A
B
INTERNAL
OSCILLATOR
*
(f
≈ 200 Hz)
B
OSC
*
A
+
–
LOW IMPEDANCE
OUTPUT BUFFER
3
+
–
+INPUT
6
OUTPUT
MAIN
AMPLIFIER
NOTE: Internal capacitors. No external capacitors required.
TC901- 7 9/5/96
TELCOM SEMICONDUCTOR, INC.
3-259