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Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers AD8551/AD8552/AD8554

a FEATURES Low Offset Voltage: 1 ␮V Input Offset Drift: 0.005 ␮V/؇C Rail-to-Rail Input and Output Swing +5 V/+2.7 V Single-Supply Operation High Gain, CMRR, PSRR: 130 dB Ultralow Input Bias Current: 20 pA Low Supply Current: 700 ␮A/Op Amp Overload Recovery Time: 50 ␮s No External Capacitors Required

PIN CONFIGURATIONS 8-Lead MSOP (RM Suffix) NC ؊IN A ؉IN A V؊

1

8

AD8551 4

5

8-Lead SOIC (R Suffix)

NC V+ OUT A NC

NC 1 ؊IN A 2 +IN A 3

NC = NO CONNECT

8 NC

AD8551

V؊ 4

7 V+ 6 OUT A 5 NC

NC = NO CONNECT

APPLICATIONS Temperature Sensors Pressure Sensors Precision Current Sensing Strain Gage Amplifiers Medical Instrumentation Thermocouple Amplifiers

OUT A ؊IN A +IN A V؊

1

8

AD8552 4

5

V+ OUT B ؊IN B +IN B

؊IN A 2

8 V+

AD8552

V؊ 4

This new family of amplifiers has ultralow offset, drift and bias current. The AD8551, AD8552 and AD8554 are single, dual and quad amplifiers featuring rail-to-rail input and output swings. All are guaranteed to operate from +2.7 V to +5 V single supply.

With an offset voltage of only 1 µV and drift of 0.005 µV/°C, the AD8551 is perfectly suited for applications where error sources cannot be tolerated. Temperature, position and pressure sensors, medical equipment and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. The rail-to-rail input and output swings provided by the AD855x family make both high-side and lowside sensing easy.

OUT A 1 +IN A 3

GENERAL DESCRIPTION

The AD855x family provides the benefits previously found only in expensive autozeroing or chopper-stabilized amplifiers. Using Analog Devices’ new topology these new zero-drift amplifiers combine low cost with high accuracy. No external capacitors are required.

8-Lead SOIC (R Suffix)

8-Lead TSSOP (RU Suffix)

1

14

AD8554 7

8

OUT D ؊IN D ؉IN D V؊ ؉IN C ؊IN C OUT C

6 ؊IN B 5 +IN B

14-Lead SOIC (R Suffix)

14-Lead TSSOP (RU Suffix) OUT A ؊IN A ؉IN A V؉ ؉IN B ؊IN B OUT B

7 OUT B

OUT A 1

14

OUT D

؊IN A 2

13 ؊IN D

+IN A 3

12

+IN D

11

V+ 4

AD8554

+IN B 5

10 +IN C

؊IN B 6

9

؊IN C

8

OUT C

OUT B

7

The AD855x family is specified for the extended industrial/ automotive (–40°C to +125°C) temperature range. The AD8551 single is available in 8-lead MSOP and narrow 8-lead SOIC packages. The AD8552 dual amplifier is available in 8-lead narrow SO and 8-lead TSSOP surface mount packages. The AD8554 quad is available in narrow 14-lead SOIC and 14-lead TSSOP packages.

REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

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., 1999


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