Copyright

© Cirrus Logic, Inc. 2007

(All Rights Reserved)

Cirrus Logic, Inc.

http://www.cirrus.com

CS3003

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

1.0 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 CS3003 single amplifier is designed for precision

amplification of low-level signals. This amplifier achieves

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 amplifier operates with any supply voltage

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

Pin Configurations

NC

-IN

+IN

V-

NC

V+

Output

NC

1

2

3

4

8

7

6

5

-

+

1

1

1

Exposed

Thermal

Die Pad

NC

V+

Output

NC

NC

-IN

+IN

V-

8

7

6

5

1

2

3

4

–

+

1

1

1

2

8-Lead SOIC

QFN-8

CS3003

(Top View)

1. Must not be connected.

2. Connect thermal die pad to V-.

Exposed

Thermal

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

DS735F1