Micropower, Rail-to-Rail I/O,

High Linearity Amplifiers

Preliminary Technical Data

AD8506

Rev. PrA

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FEATURES

High linearity

PSRR: 105dB minimum

CMRR: 105 dB typical

Very low supply current: 20 μA/amp maximum

1.8 V to 5.5 V single-supply operation

Rail-to-rail input and output

Low noise 2.9 μV p-p from 0.1 Hz to 10 Hz

4 mV offset voltage maximum

Very low input bias current: 1 pA typical

APPLICATIONS

Pressure and position sensors

Remote security

Medical monitors

Battery-powered consumer equipment

Hazard detectors

GENERAL DESCRIPTION

The AD8506 is a dual micro-power amplifier featuring

rail-to-rail input and output swings while operating from

a 1.8 V to 5.5 V single power supply.

Employing a new circuit technology, these low cost amplifiers

offer high linearity (excellent PSRR and CMRR performance)

and very low bias current, while operating with a supply current

of less than 20 μA per amplifier.

This combination of features makes the AD8506 amplifier an

ideal choice for battery-powered applications since it minimizes

errors due to power supply voltage variations over the battery’s

lifetime and maintains relatively high CMRR for a rail-to-rail op

amp.

Remote battery-powered sensors, handheld instrumentation

and consumer equipment, hazard detection (for example, smoke,

fire, and gas), and patient monitors can benefit from the

features of the AD8506 amplifier.

The AD8506 is specified for both the industrial temperature

range (−40°C to +85°C) and the extended industrial temperature

range (−40°C to +125°C). AD8506 dual amplifiers are available

in the standard 8-lead MSOP and WLCSP.

PIN CONFIGURATIONS

Figure 1. 8-Ball WLCSP

Figure 2. 8-Lead MSOP (RM Suffix)

1

8

OUT A

-IN A

+IN A

V-

AD8506

OUT B

-IN B

+IN B

V+

TOP VIEW

(BALL SIDE DOWN)

BALL A1

CORNER

A

3

2

1

B

C

AD8606

OUT

A

OUT

B

-IN

+IN

-IN

+IN

V-

V+