© 2002 Microchip Technology Inc.

DS21464B-page 1

Features

• Low Offset Over Temperature Range: 10

µV

• Ultra Low Long Term Drift: 150nV/Month

• Low Temperature Drift: 100nV/

• Low DC Input Bias Current: 15pA

• High Gain, CMRR and PSRR: 110dB Min

• Low Input Noise Voltage: 0.2

• Internally Compensated for Unity Gain Operation

• Clamp Circuit for Fast Overload Recovery

Applications

• Instrumentation

• Medical Instrumentation

• Embedded Control

• Temperature Sensor Amplifier

• Strain Gage Amplifier

Device Selection Table

Package Type

General Description

The TC7652 is a lower noise version of the TC7650,

sacrificing some input specifications (bias current and

bandwidth) to achieve a 10x reduction in noise. All the

other benefits of the chopper technique are present,

(i.e, freedom from offset adjust, drift and reliability prob-

lems from external trim components). Like the TC7650,

the TC7652 requires only two noncritical external caps

for storing the chopped null potentials. There are no

significant chopping spikes, internal effects or over-

range lockup problems.

Part Number

Package

Temperature

Range

TC7652CPA

8-Pin Plastic DIP

0°C to +70°C

TC7652CPD

14-Pin Plastic DIP

0°C to +70°C

1

2

3

4

8

7

6

5

Output

TC7652CPA

-Input

+Input

Output

Clamp

1

2

3

4

5

6

7

14

13

12

11

10

9

8

NC

NC = No Internal Connection

(May Be Used As Input Guard)

INT/EXT

EXT CLK

In

INT CLK

Out

Output

Output

Clamp

-Input

+Input

NC

TC7652CPD

8-Pin DIP

14-Pin DIP

TC7652

Low Noise, Chopper Stabilized Operational Amplifier