Advanced Product Information

This document contains advanced information for a new product.

Cirrus Logic reserves the right to modify this product without notice.

1

Copyright

© Cirrus Logic, Inc. 2002

(All Rights Reserved)

Cirrus Logic, Inc.

http://www.cirrus.com

CS3011

CS3012

Precision Low Voltage Amplifier; DC to 1 kHz

Features

Low Offset: 10

µVMax

Low Drift: 0.05

µV/°C Max

Low Noise

–12nV/

√Hz @1.0 Hz

– 0.1 to 10 Hz = 250 nVp-p

– 1/f corner @ 0.08 Hz

Open-Loop Voltage Gain

– 1000 Trillion Typ

– 10 Billion Min

Rail-to-Rail Output Swing

750

µA Supply Current

Slew rate: 2 V/

µs

Applications

Thermocouple/Thermopile Amplifiers

Load Cell and Bridge Transducer Amplifiers

Precision Instrumentation

Battery-Powered Systems

Description

The CS3011 single amplifier and the CS3012 dual am-

plifier are designed for precision amplification of low

level signals and are ideally suited to applications that

require very high closed loop gains. These amplifiers

achieve excellent offset stability, super high open loop

gain, and low noise over time and temperature. The de-

vices also exhibit excellent CMRR and PSRR. The

common mode input range includes the negative supply

rail. The amplifiers operate with any total supply voltage

from 2.7 V to 6.7 V (±1.35 V to ±3.35 V).

Pin Configurations

PWDN

-In

+In

V-

DNC

V+

Output

DNC

1

2

3

4

8

7

6

5

-

+

CS3011

8-lead SOIC

Out A

-In A

+In A

V-

V+

Out B

-In B

+In B

1

2

3

4

8

7

6

5

A

B

-

-

+

+

CS3012

8-lead SOIC

CS3011

R1

100

R2

64.9k

C1

0.015

µµµµF

Dexter Research

Thermopile ST60

Thermopile Amplifier with a Gain of 650 V/V

1

10

100

0.001

0.010

0.1

1

10

Frequency (Hz)

Noise vs. Frequency (Measured)

OCT ‘02

DS597PP1