TC901 Datasheet, PDF (1/6 Pages) TelCom Semiconductor, Inc – MONOLITHIC, AUTO-ZEROED OPERATIONAL AMPLIFIER

Dual Auto-Zeroed Operational Amplifiers
TC901
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)
NC 1
–INPUT 2
+INPUT 3
VSS ₄
–
TC901CPA
8 NC
NC 1
7 VDD
–INPUT 2
6 OUTPUT +INPUT 3
5 NC
VSS ₄
8 NC
–
7 VDD
6 OUTPUT
TC901COA 5 ^NC
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.
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,
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 in-
dustry-standard 741 pinout.
ORDERING INFORMATION
NC = NO INTERNAL CONNECTION
Part No.
Package
Temperature
Range
FUNCTIONAL BLOCK DIAGRAM
TC901COA
TC901CPA
8-Pin SOIC
8-Pin Plastic DIP
0°C to +70°C
0°C to +70°C
VDD
VSS
4
7
–INPUT
2
VOS CORRECTION AMPLIFIER
+
–
*
A
B
B
TC901
INTERNAL
OSCILLATOR
(fOSC ≈ 200 Hz)
*
A
3
+INPUT
+
– _MAIN
AMPLIFIER
LOW IMPEDANCE
+ OUTPUT BUFFER
–
6
OUTPUT
NOTE: Internal capacitors. No external capacitors required.
© 2001 Microchip Technology Inc. DS21480A
TC901- 7 9/5/96