AD8422
Info : RECOMMENDED FOR NEW DESIGNS
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AD8422

High Performance, Low Power, Rail-to-Rail Precision Instrumentation Amplifier

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 14
1ku List Price Starting From $2.47
Features
  • Low power: 368 μA maximum quiescent current
  • Rail-to-rail output
  • Low noise and distortion
    • 8 nV/√Hz maximum input voltage noise at 1 kHz
    • 0.15 μV p-p RTI noise (G = 100)
    • 0.5 ppm nonlinearity with 2 kΩ load (G = 1)
  • Excellent ac specifications
    • 80 dB minimum CMRR at 10 kHz (G = 1)
    • 2.2 MHz bandwidth (G = 1)
  • High precision dc performance (AD8422BRZ)
    • 150 dB minimum CMRR (G = 1000)
    • 0.04% maximum gain error (G = 1000)
    • 0.3 μV/°C maximum input offset drift
    • 0.5 nA maximum input bias current
  • Wide supply range
    • 4.6 V to 36 V single supply
    • ±2.3 V to ±18 V dual supply
  • Input overvoltage protection: 40 V from opposite supply
  • Gain range: 1 to 1000
  • Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC_N
Additional Details
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The AD8422 is a high precision, low power, low noise, rail-to-rail instrumentation amplifier that delivers the best performance per unit microampere in the industry. The AD8422 processes signals with ultralow distortion performance that is load independent over its full output range.

The AD8422 is the third generation development of the industry standard AD620. The AD8422 employs new process technologies and design techniques to achieve higher dynamic range and lower errors than its predecessors, while consuming less than one-third of the power. The AD8422 uses the high performance pinout introduced by the AD8221.

Very low bias current makes the AD8422 error-free with high source impedance, allowing multiple sensors to be multiplexed to the inputs. Low voltage noise and low current noise make the AD8422 an ideal choice for measuring a Wheatstone bridge.

The wide input range and rail-to-rail output of the AD8422 bring all of the benefits of a high performance in-amp to single-supply applications. Whether using high or low supply voltages, the power savings make the AD8422 an excellent choice for high channel count or power sensitive applications.

The AD8422 uses robust input protection that ensures reliability without sacrificing noise performance. The AD8422 has high ESD immunity, and the inputs are protected from continuous voltages up to 40 V from the opposite supply rail.

A single resistor sets the gain from 1 to 1000. The reference pin can be used to apply a precise offset to the output voltage.

The AD8422 is specified from −40°C to +85°C for the 8-lead MSOP and the 8-lead SOIC_N and from −40°C to +125°C for the 8-lead LFCSP.

APPLICATIONS

  • Medical instrumentation
  • Industrial process controls
  • Strain gages
  • Transducer interfaces
  • Precision data acquisition systems
  • Channel-isolated systems
  • Portable instrumentation
Part Models 14
1ku List Price Starting From $2.47

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Apr 4, 2023

- 22_0142

Qualification of an Alternate Wafer Fab for High Voltage Bipolar Products (HVBIP) to Analog Devices, Inc. Wilmington MA

AD8422ACPZ-R7

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Aug 10, 2022

- 22_0084

AD8422 Die and Data Sheet Revision

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Apr 26, 2021

- 21_0068

AD8422 Data Sheet Update

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Dec 15, 2014

- 14_0158

AD8422 Die Revision and Datasheet Change

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Filter by Model

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Part Models

Product Lifecycle

PCN

Apr 4, 2023

- 22_0142

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Qualification of an Alternate Wafer Fab for High Voltage Bipolar Products (HVBIP) to Analog Devices, Inc. Wilmington MA

AD8422ACPZ-R7

PRODUCTION

AD8422ACPZ-RL

PRODUCTION

AD8422ARMZ

PRODUCTION

AD8422ARMZ-R7

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AD8422ARMZ-RL

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Aug 10, 2022

- 22_0084

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AD8422 Die and Data Sheet Revision

AD8422ACPZ-R7

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AD8422ACPZ-RL

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AD8422ARMZ

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Apr 26, 2021

- 21_0068

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AD8422 Data Sheet Update

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AD8422BRZ-RL

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Dec 15, 2014

- 14_0158

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AD8422 Die Revision and Datasheet Change

AD8422ARMZ

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AD8422ARMZ-R7

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AD8422ARMZ-RL

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

EVAL-INAMP

AD62x, AD822x, AD842x Series InAmp Evaluation Board

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EVAL-INAMP

AD62x, AD822x, AD842x Series InAmp Evaluation Board

AD62x, AD822x, AD842x Series InAmp Evaluation Board

Product Detail

Analog Devices provides a line of evaluation boards designed to help users evaluate our instrumentation amplifiers in 8 pin packages. Access the user guide UG-261.

This user guide describes three generic evaluation boards that can be used to evaluate many of Analog Devices instrumentation amplifiers. For information on the performance of a specific instrumentation amplifier, see the data sheet for that instrumentation amplifier.

  • 3 generic, easy-to-use evaluation boards
    • Shipped with an assortment of Analog Devices in-amps
    • Solder in the in-amp to be tested
    • Test pins already populated
    • Decoupling capacitors already populated
  • EVAL-INAMP-62RZ board: Compatible with AD620, AD621, AD622, AD623, AD627, AD8223, AD8225,  LT1167, LT1168 and LT6370 in SOIC or PDIP
  • EVAL-INAMP-82RZ board: Compatible with AD8221, AD8226, AD8227, AD8228, AD8229, AD8421, AD8428, and AD8429 in SOIC package
  • EVAL-INAMP-82RMZ board: Compatible with AD8220, AD8221, AD8226, AD8227, AD8228, AD8236, and AD8421 in MSOP package
Tools & Simulations

Tools & Simulations 4

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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