Copyright

© Cirrus Logic, Inc. 2007

(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, high open loop gain, and low

noise. The devices also exhibit excellent CMRR and

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).

Pin Configurations

CS3004

Exposed

Thermal

Die Pad

V+

OUT B

-IN B

+IN B

OUT A

-IN A

+IN A

V-

8

7

6

5

1

2

3

4

– +

A

–

+

B

Out A

-In A

+In A

V-

V+

Out B

-In B

+In B

1

2

3

4

8

7

6

5

A

B

-

-

+

+

8-Lead SOIC

QFN-8

(Top View)

Exposed

Thermal

1. Must not be connected.

2. Connect thermal die pad to V-.

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

AUG ‘07

DS719F1