55 V, EMI Enhanced, Zero Drift, Ultralow Noise,

Rail-to-Rail Output Operational Amplifiers

Data Sheet

ADA4522-1/ADA4522-2/ADA4522-4

Rev. E

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FEATURES

Low offset voltage: 5 µV maximum

Extremely low offset voltage drift: 22 nV/°C maximum

Low voltage noise density: 5.8 nV/√Hz typical

117 nV p-p typical from 0.1 Hz to 10 Hz

Low input bias current: 50 pA typical

Unity-gain crossover: 3 MHz typical

Single-supply operation: input voltage range includes

ground and rail-to-rail output

Wide range of operating voltages

Single-supply operation: 4.5 V to 55 V

Dual-supply operation: ±2.25 V to ±27.5 V

Integrated EMI filters

Unity-gain stable

APPLICATIONS

Inductance, capacitance, and resistance (LCR)

meter/megohmmeter front-end amplifiers

Load cell and bridge transducers

Magnetic force balance scales

High precision shunt current sensing

Thermocouple/resistance temperature detector (RTD) sensors

Programmable logic controller (PLC) input and output

amplifiers

GENERAL DESCRIPTION

The ADA4522-1/ADA4522-2/ADA4522-4 are single/dual/quad

channel, zero drift op amps with low noise and power, ground

sensing inputs, and rail-to-rail output, optimized for total

accuracy over time, temperature, and voltage conditions. The

wide operating voltage and temperature ranges, as well as the

high open-loop gain and very low dc and ac errors make the

devices well suited for amplifying very small input signals and

for accurately reproducing larger signals in a wide variety of

applications.

The ADA4522-1/ADA4522-2/ADA4522-4 performance is

specified at 5.0 V, 30 V, and 55 V power supply voltages. These

devices operate over the range of 4.5 V to 55 V, and are excellent

for applications using single-ended supplies of 5 V, 10 V, 12 V,

and 30 V, or for applications using higher single supplies and

dual supplies of ±2.5 V, ±5 V, and ±15 V. The ADA4522-1/

ADA4522-2/ADA4522-4 use on-chip filtering to achieve high

immunity to electromagnetic interference (EMI).

The ADA4522-1/ADA4522-2/ADA4522-4 are fully specified

over the extended industrial temperature range of −40°C to

+125°C and are available in 8-lead MSOP, 8-lead SOIC, 14-lead

SOIC, and 14-lead TSSOP packages.

PIN CONNECTION DIAGRAM

V+

8

OUT B

7

–IN B

6

+IN B

5

ADA4522-2

TOP VIEW

(Not to Scale)

Figure 1. 8-Lead MSOP (RM Suffix) and 8-Lead SOIC (R Suffix)

Pin Configuration

For the ADA4522-1 and ADA4522-4 pin connections and for

more information about the pin connections for these products,

see the Pin Configurations and Function Descriptions section.

100

10

1

0.1

10

100k

1M

10k

1k

100

FREQUENCY (Hz)

5V

30V

55V

Table 1. Zero Drift Op Amps (<0.1 µV/°C)

Supply Voltage

5 V

16 V

30 V

55 V

Single

ADA4528-1

AD8638

ADA4638-1

ADA4522-1

AD8628

AD8538

ADA4051-1

Dual

ADA4528-2

AD8639

ADA4522-2

AD8629

AD8539

ADA4051-2

Quad

AD8630

ADA4522-4