18 V, Micropower, CMOS, Rail-to-Rail

Input/Output Operational Amplifier

AD8546

Rev. 0

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FEATURES

Micropower at high voltage (18 V): 18 μA typical

Single-supply operation: 2.7 V to 18 V

Dual-supply operation: ±1.35 V to ±9 V

Low input bias current: 20 pA

Gain bandwidth product: 200 kHz

Unity-gain stable

APPLICATIONS

Portable medical equipment

Current monitors

4 mA to 20 mA loop drivers

Buffer/level shifting

Multipole filters

Remote/wireless sensors

Low power transimpedance amplifiers

PIN CONFIGURATION

V+

8

OUT B

7

–IN B

6

+IN B

5

AD8546

TOP VIEW

(Not to Scale)

Figure 1. 8-Lead MSOP

GENERAL DESCRIPTION

The AD8546 is a dual, micropower, high impedance, rail-to-rail

input/output amplifier optimized for low power and wide operating

supply voltage range applications.

The AD8546 operates from 2.7 V up to 18 V with a typical supply

current of 18 μA. The combination of low supply current, high

input impedance, and rail-to-rail input and output makes the

AD8546 ideal for dc gain and buffering of sensor front ends or

high impedance input sources in wireless or remote sensors or

transmitters.

With its low power consumption and rail-to-rail input and

output, the AD8546 is ideally suited for a variety of battery-

powered, portable applications such as ECGs, pulse monitors,

glucose meters, smoke and fire detectors, vibration monitors,

and backup battery sensors.

The AD8546 is specified over the extended industrial temperature

range of −40°C to +125°C and is available in an 8-lead MSOP.

Table 1. Micropower Op Amps1

Amplifier

Supply Voltage

5 V

12 V to 16 V

36 V

Single

AD8500

AD8663

ADA4505-1

AD8505

AD8541

AD8603

Dual

AD8502

AD8667

OP295

ADA4505-2

OP281

ADA4062-2

AD8506

AD8542

AD8607

Quad

AD8504

AD8669

OP495

ADA4505-4

OP481

ADA4062-4

AD8508

AD8544

AD8609