Zero-Drift, Single-Supply, Rail-to-Rail

Input/Output Operational Amplifiers

Data Sheet

AD8551/AD8552/AD8554

Rev. E

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FEATURES

Low offset voltage: 1 μV

Input offset drift: 0.005 μV/°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 μA/op amp

Overload recovery time: 50 μs

No external capacitors required

APPLICATIONS

Temperature sensors

Pressure sensors

Precision current sensing

Strain gage amplifiers

Medical instrumentation

Thermocouple amplifiers

GENERAL DESCRIPTION

This 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 with a single supply.

The AD855x family provides the benefits previously found only

in expensive auto-zeroing or chopper-stabilized amplifiers.

Using Analog Devices, Inc. topology, these new zero-drift

amplifiers combine low cost with high accuracy. No external

capacitors are required.

With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the

AD855x are perfectly suited for applications in which 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 low-side sensing easy.

The AD855x family is specified for the extended industrial/auto

motive temperature range (−40°C to +125°C). The AD8551

single amplifier is available in 8-lead MSOP and 8-lead narrow

SOIC packages. The AD8552 dual amplifier is available in 8-lead

narrow SOIC and 8-lead TSSOP surface-mount packages. The

AD8554 quad is available in 14-lead narrow SOIC and 14-lead

TSSOP packages.

PIN CONFIGURATIONS

–IN A

+IN A

V–

V+

OUT A

NC

NC

NC = NO CONNECT

NC

1

8

AD8551

4

5

Figure 1. 8-Lead MSOP (RM Suffix)

–IN A

V–

+IN A

V+

OUT A

NC

NC

NC

NC = NO CONNECT

AD8551

1

2

3

4

8

7

6

5

Figure 2. 8-Lead SOIC (R Suffix)

–IN A

+IN A

V–

OUT B

–IN B

+IN B

OUT A

V+

1

8

AD8552

4

5

Figure 3. 8-Lead TSSOP (RU Suffix)

–IN A

V–

+IN A

OUT B

–IN B

V+

+IN B

OUT A

AD8552

1

2

3

4

8

7

6

5

Figure 4. 8-Lead SOIC (R Suffix)

OUT A

–IN A

+IN A

V+

–IN D

+IN D

V–

OUT D

+IN B

–IN B

OUT B

–IN C

OUT C

+IN C

AD8554

1

14

7

8

Figure 5. 14-Lead TSSOP (RU Suffix)

14

13

12

11

10

9

8

1

2

3

4

5

6

7

–IN A

+IN A

V+

+IN B

–IN B

OUT B

OUT D

–IN D

+IN D

V–

+IN C

–IN C

OUT C

OUT A

AD8554

Figure 6. 14-Lead SOIC (R Suffix)