Low Power, Precision, Auto-Zero Op Amps

Data Sheet

AD8538/AD8539

Rev. B

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FEATURES

Low offset voltage: 13 µV maximum

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

Low supply current: 180 µA

Qualified for automotive applications

APPLICATIONS

Mobile communications

Portable instrumentation

Battery-powered devices

Sensor interfaces

Temperature measurement

Electronic scales

GENERAL DESCRIPTION

The AD8538/AD8539 are very high precision amplifiers featuring

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

consumption. The supply current is less than 215 μA maximum

per amplifier 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/AD8539 operate at very low power making these

amplifiers ideal for battery-powered devices and portable

equipment.

The AD8538/AD8539 are 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, and the AD8539 amplifier is available in 8-lead, narrow

body SOIC and 8-lead MSOP. See the Ordering Guide for the

automotive part.

PIN CONFIGURATIONS

OUT

1

V–

2

+IN

3

V+

5

–IN

4

AD8538

TOP VIEW

(Not to Scale)

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

NC

1

−IN 2

+IN

3

V− 4

NC

8

V+

7

OUT

6

NC

5

NC = NO CONNECT

AD8538

TOP VIEW

(Not to Scale)

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

OUT A 1

–IN A 2

+IN A 3

V–

4

V+

8

OUT B

7

–IN B

6

+IN B

5

AD8539

TOP VIEW

(Not to Scale)

Figure 3. 8-Lead SOIC_N (R-8)

OUT A 1

–IN A 2

+IN A 3

V–

4

V+

8

OUT B

7

–IN B

6

+IN B

5

AD8539

TOP VIEW

(Not to Scale)

Figure 4. 8-Lead MSOP (RM-8)