TC7650

DS21463B-page 2

© 2002 Microchip Technology Inc.

General Description

The TC7650 CMOS chopper stabilized operational

amplifier practically removes offset voltage error terms

from system error calculations. The 5

specification, for example, represents a 15 times

improvement over the industry standard OP07E. The

50nV/°C offset drift specification is over 25 times lower

than the OP07E. The increased performance elimi-

adjustment and the reliability problems caused by dam-

aged trimmers.

The TC7650 performance advantages are achieved

without the additional manufacturing complexity and

niques.

stored on two user supplied external capacitors. The

points. The main amplifier input signal is never

switched. Switching spikes are not present at the

TC7650 output.

The 14-pin dual-in-line package (DIP) has an external

oscillator input to drive the nulling circuitry for optimum

noise performance. Both the 8 and 14-pin DIPs have

an output voltage clamp circuit to minimize overload

recovery time.

Functional Block Diagram

TC7650

Null

NULL

Inputs

Output

Clamp

Output

B

B

A

For 8-Pin DIP, connect to Vss

Null

Amplifier

Main

Amplifier

Output Clamp

Circuit

Intermod

Compensation

Oscillator

AB

INT/EXT

EXT CLK IN

CLK OUT

14-Pin DIP Only

BA

*