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AD8541/AD8542/AD8544

REV. D

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General-Purpose CMOS

Rail-to-Rail Amplifiers

PIN CONFIGURATIONS

FEATURES

Single-Supply Operation: 2.7 V to 5.5 V

Low Supply Current: 45

A/Amplifier

Wide Bandwidth: 1 MHz

No Phase Reversal

Low Input Currents: 4 pA

Unity Gain Stable

Rail-to-Rail Input and Output

APPLICATIONS

ASIC Input or Output Amplifier

Sensor Interface

Piezo Electric Transducer Amplifier

Medical Instrumentation

Mobile Communication

Audio Output

Portable Systems

GENERAL DESCRIPTION

The AD8541/AD8542/AD8544 are single, dual, and quad rail-

to-rail input and output single-supply amplifiers featuring very

low supply current and 1 MHz bandwidth. All are guaranteed to

operate from a 2.7 V single supply as well as a 5 V supply. These

parts provide 1 MHz bandwidth at a low current consumption

of 45

mA per amplifier.

Very low input bias currents enable the AD8541/AD8542/AD8544

to be used for integrators, photodiode amplifiers, piezo electric

sensors, and other applications with high source impedance. Sup-

ply current is only 45

mA per amplifier, ideal for battery operation.

Rail-to-rail inputs and outputs are useful to designers buffering

ASICs in single-supply systems. The AD8541/AD8542/AD8544

are optimized to maintain high gains at lower supply voltages,

making them useful for active filters and gain stages.

The AD8541/AD8542/AD8544 are specified over the extended

industrial temperature range (–40

∞C to +125∞C). The AD8541

is available in 8-lead SOIC, 5-lead SC70, and 5-lead SOT-23

packages. The AD8542 is available in 8-lead SOIC, 8-lead

MSOP, and 8-lead TSSOP surface-mount packages. The AD8544

is available in 14-lead narrow SOIC and 14-lead TSSOP surface-

mount packages. All MSOP, SC70, and SOT versions are available

in tape and reel only.

5-Lead SC70 and SOT-23

(KS and RT Suffixes)

1

2

3

5

4

IN A

+IN A

V+

OUT A

AD8541

V

8-Lead SOIC

(R Suffix)

NC

–IN A

+IN A

V–

V+

OUT A

NC

NC

1

2

3

4

8

7

6

5

AD8541

NC = NO CONNECT

8-Lead SOIC, MSOP, and TSSOP

(R, RM, and RU Suffixes)

AD8542

1

2

3

4

8

7

6

5

OUT A

–IN A

+IN A

V–

+IN B

–IN B

OUT B

V+

14-Lead SOIC and TSSOP

(R and RU Suffixes)

AD8544

1

2

3

4

14

13

12

11

OUT A

–IN A

+IN A

V+

V–

+IN D

–IN D

OUT D

5

6

7

10

9

8

+IN B

–IN B

OUT B

OUT C

–IN C

+IN C