Data Sheet

ADA4522-1/ADA4522-2/ADA4522-4

55 V, EMI Enhanced, Zero Drift, Ultralow Noise, Rail-to-Rail Output Operational

Amplifiers

Rev. G

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FEATURES

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Low offset voltage: 5 µV maximum

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

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Low voltage noise density: 5.8 nV/√Hz typical

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

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Low input bias current: 50 pA typical

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Unity-gain crossover: 3 MHz typical

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Single-supply operation: input voltage range includes ground and

rail-to-rail output

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Wide range of operating voltages

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Single-supply operation: 4.5 V to 55 V

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

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Integrated EMI filters

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Unity-gain stable

APPLICATIONS

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Inductance, capacitance, and resistance (LCR) meter/ megohm-

meter front-end amplifiers

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Load cell and bridge transducers

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Magnetic force balance scales

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High precision shunt current sensing

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Thermocouple/resistance temperature detector (RTD) sensors

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Programmable logic controller (PLC) input and output amplifiers

PIN CONNECTION DIAGRAM

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.

Figure 2. Voltage Noise Density vs. Frequency, VSY = ±15 V

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 appli-

cations 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.

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