1.8 V to 5 V Auto-Zero, In-Amp

with Shutdown

AD8553

Rev. A

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FEATURES

Low offset voltage: 20 μV max

Low input offset drift: 0.1 μV/°C max

High CMR: 120 dB min @ G = 100

Low noise: 0.7 μV p-p from 0.01 Hz to 10 Hz

Wide gain range: 0.1 to 10,000

Single-supply operation: 1.8 V to 5.5 V

Rail-to-rail output

Shutdown capability

APPLICATIONS

Strain gauge

Weigh scales

Pressure sensors

Laser diode control loops

Portable medical instruments

Thermocouple amplifiers

PIN CONFIGURATION

RGA

1

VINP

2

VCC

3

VO

4

VFB

5

RGB

10

VINN

9

GND

8

7

ENABLE

6

AD8553

TOP VIEW

(Not to Scale)

Figure 1. 10-Lead MSOP

GENERAL DESCRIPTION

The AD8553 is a precision instrumentation amplifier featuring

low noise, rail-to-rail output and a power-saving shutdown

mode. The AD8553 also features low offset voltage and drift

coupled with high common-mode rejection. In shutdown

mode, the total supply current is reduced to less than 4 μA.

The AD8553 is capable of operating from 1.8 V to 5.5 V.

With a low offset voltage of 20 μV, an offset voltage drift of

0.1 μV/°C, and a voltage noise of only 0.7 μV p-p (0.01 Hz to

10 Hz), the AD8553 is ideal for applications where error sources

cannot be tolerated. Precision instrumentation, position and

pressure sensors, medical instrumentation, and strain gauge

amplifiers benefit from the low noise, low input bias current,

and high common-mode rejection. The small footprint and low

cost are ideal for high volume applications.

The small package and low power consumption allow

maximum channel density and minimum board size for

space-critical equipment and portable systems.

The AD8553 is specified over the industrial temperature range

from −40°C to +85°C. The AD8553 is available in a Pb-free,

10-lead MSOP.