Low Power, Precision Auto-Zero Op Amp

AD8538

Rev. 0

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FEATURES

PIN CONFIGURATION DIAGRAMS

Low offset voltage: 13 μV maximum

V–

2

+IN

3

V+

5

–IN

4

AD8538

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Input offset drift: 0.03 μV/°C

Single-supply operation: 2.7 V to 5.5 V

High gain, CMRR, and PSRR

Low input bias current: 25 pA

Figure 1. 5-Lead TSOT-23 (UJ-5)

Low supply current: 180 μA

APPLICATIONS

V−

4

NC

8

V+

7

OUT

6

NC

5

NC = NO CONNECT

AD8538

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Mobile communications

Portable instrumentation

Battery-powered devices

Sensor interfaces

Temperature measurement

Electronic scales

Figure 2. 8-Lead SOIC_N (R-8)

GENERAL DESCRIPTION

The AD8538 is a very high precision amplifier featuring

extremely low offset voltage, low input bias current, and low

power consumption. The supply current is less than 180 μA at

5.0 V. Operation is fully specified from 2.7 V to 5.0 V single

supply (±1.35 V to ±2.5 V dual supply).

The AD8538 operates using very low power making this

amplifier ideal for battery-powered devices and portable

equipment.

The AD8538 is specified over the extended industrial temperature

range (−40°C to +125°C). The AD8538 amplifier is available in

5-lead TSOT-23, and 8-lead, narrow body SOIC packages.