Copyright

 Cirrus Logic, Inc. 2009

(All Rights Reserved)

Cirrus Logic, Inc.

http://www.cirrus.com

CS3004

Precision Low-voltage Amplifier



Low Offset:

–10 μV Max.



Low Drift:

–0.05 μV/°C Max.



Low Noise:

– 17 nV/√Hz



Open-loop Voltage Gain:

– 150 dB Typ.



Rail-to-Rail Inputs



Rail-to-Rail Output Swing

– to within 10 mV of supply voltage



2.1 mA Supply Current



Slew rate:

–0.25 V/μs

Applications



Thermocouple/Thermopile Amplifiers



Load Cell and Bridge Transducer Amplifiers



Precision Instrumentation



Battery-powered Systems

Description

The CS3004 dual amplifier is designed for precision am-

plification of low-level signals. These amplifiers achieve

excellent offset stability, hi gh open loop gain, and low

noise. T he d evices also exhibit e xcellent CMRR an d

PSRR. The common mode input range includes the sup-

ply rails. The amplifiers operate with any supply voltage

from 2.7 V to 5 V (±1.35 V to ±2.50 V).

CS3004

8-Lead SOIC

(Top View)

1. Must not be connected.

Out A

-In A

+In A

V-

V+

Out B

-In B

+In B

A

B

-

-

+

+

1

2

3

4

8

7

6

5

1

10

100

1000

0.01

0.1

1

10

Frequency (Hz)

-200

-150

-100

-50

0

50

100

150

200

0

1

23

4

5

67

89

10

Time (sec)

Noise vs. Frequency (Measured)

0.01 Hz to 10 Hz Noise Performance

JUL ‘09

DS719F2