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a

AD8631/AD8632

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2000

1.8 V, 5 MHz Rail-to-Rail

Low Power Operational Amplifiers

PIN CONFIGURATIONS

5-Lead SOT-23

(RT Suffix)

1

2

3

5

4 –IN A

+IN A

V+

OUT A

AD8631

V–

8-Lead SOIC

(R Suffix)

OUT A

–IN A

+IN A

V–

V+

OUT B

–IN B

+IN B

AD8632

18

27

36

45

8-Lead

SOIC

(RM Suffix)

–IN A

+IN A

V–

OUT B

–IN B

+IN B

V+

1

4

5

8

AD8632

OUT A

FEATURES

Single Supply Operation: 1.8 V to 6 V

Space-Saving SOT-23,

SOIC Packaging

Wide Bandwidth: 5 MHz @ 5 V, 4 MHz @ 1.8 V

Low Offset Voltage: 4 mV Max, 0.8 mV typ

Rail-to-Rail Input and Output Swing

2 V/ s Slew Rate @ 1.8 V

Only 225

A Supply Current @ 1.8 V

APPLICATIONS

Portable Communications

Portable Phones

Sensor Interface

Active Filters

PCMCIA Cards

ASIC Input Drivers

Wearable Computers

Battery-Powered Devices

New Generation Phones

Personal Digital Assistants

GENERAL DESCRIPTION

The AD8631 brings precision and bandwidth to the SOT-23-5

package at single supply voltages as low as 1.8 V and low supply

current. The small package makes it possible to place the AD8631

next to sensors, reducing external noise pickup.

The AD8631 and AD8632 are rail-to-rail input and output bipolar

amplifiers with a gain bandwidth of 4 MHz and typical voltage

offset of 0.8 mV from a 1.8 V supply. The low supply current and

the low supply voltage makes these parts ideal for battery-powered

applications. The 3 V/

µs slew rate makes the AD8631/AD8632 a

good match for driving ASIC inputs, such as voice codecs.

The AD8631/AD8632 is specified over the extended industrial

(–40 C to +125 C) temperature range. The AD8631 single is

available in 5-lead SOT-23 surface-mount packages. The dual

AD8632 is available in 8-lead SOIC and

µSOIC packages.