TC901 Datasheet, PDF (1/4 Pages) TelCom Semiconductor, Inc – MONOLITHIC, AUTO-ZEROED OPERATIONAL AMPLIFIER

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TC901
MONOLITHIC, AUTO-ZEROED OPERATIONAL AMPLIFIER
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FEATURES
GENERAL DESCRIPTION
s Second-Generation Monolithic,
Chopper-Stabilized Op Amp
s No External Capacitors Required
s Single-Supply Operation ........... ±15V or 5V to 32V
s Supply Current ............................ 450µA at 15V, Typ
s Input Offset Voltage ................................... 7µV, Typ
s Common-Mode Rejection Ratio ............ 140dB, Typ
s Open-Loop Gain ............ 140dB Into 10k Load, Typ
s Input Noise ......................... 5µV at 10Hz Bandwidth
s Pinout Compatible With ICL7650
s Lowest Parts Count Chopper Op Amp
PIN CONFIGURATION (DIP and SOIC)
TC901CPA
TC901COA
NC 1
–INPUT 2
–
+INPUT 3
VSS ₄
8 NC
NC 1
7 VDD
–INPUT 2
–
6 OUTPUT +INPUT 3
5 NC
VSS ₄
8 NC
7 VDD
6 OUTPUT
5 NC
NC = NO INTERNAL CONNECTION
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
3 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.
Notable electrical characteristics are low supply cur-
rent (450µA, typical), single-supply operation (5V to 32V),
low input offset voltage (7µV, typical), low noise (<5µV_P-P,
4 ^{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.
ORDERING INFORMATION
Part No.
Package
5 Temperature
Range
TC901COA
TC901CPA
8-Pin SOIC
8-Pin Plastic DIP
0°C to +70°C
0°C to +70°C
FUNCTIONAL BLOCK DIAGRAM
VDD
VSS
6
4
7
–INPUT
2
A
3
+INPUT
VOS CORRECTION AMPLIFIER
+
–
*
A
B
B
*
TC901
INTERNAL
OSCILLATOR
(fOSC ≈ 200 Hz)
+
– _MAIN
AMPLIFIER
LOW IMPEDANCE
+ OUTPUT BUFFER
–
6
OUTPUT
7
NOTE: Internal capacitors. No external capacitors required.
TELCOM SEMICONDUCTOR, INC.
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TC901- 7 9/5/96
3-259