AD8422

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

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 singlesupply 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 on a very tight error budget.

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 and has typical performance curves to 125°C. It is available in 8-lead MSOP and 8-lead SOIC packages.

Applications

  • Medical instrumentation
  • Industrial process controls
  • Strain gages
  • Transducer interfaces
  • Precision data acquisition systems
  • Channel-isolated systems
  • Portable instrumentation

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

AD8422 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

Reviews

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Overview

11 Reviews
10 out of 10 (100%) customers recommend this product.
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Most Helpful Review

by docentore
good product. Does what supposed to. Probably will use in final product

Most Recent Review

by novec
very good IC - we will see in the future how it is time stable, but for now it probvides everithing what it promises

All Reviews

by novec, 10 Dec 14
All OK
very good IC - we will see in the future how it is time stable, but for now it probvides everithing what it promises
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by novec, 3 Dec 14
All OK
Semiconductors vere as expected. We have no problem with the implementation to our systems.
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by nii, 14 Oct 14
Electronic Engineer
Very interesting product. The device works excellently. I recommend it.
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by mkahata, 7 Oct 14
AD8422
test and use with my project. easy broken in case mistake use.
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by jopl, 22 Jan 14
AD8422
The AD8422 is extremely reliable precision instrumentation amplifier. It is excellent product.
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by Jamal, 20 Jan 14
This product has good features
Tested as very low input signal comparator in high radio field environment without problem. Very good response and overall characteristics.
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by Mauro, 15 Jan 14
The AD8422 is a perfect choice for instrumentation amplifiers
We used the AD8422 in a prototipe, as differential amplifier of a wheatstone bridge to misure the value of a resistive liquid sensor. This circuit required low bias current and wide input voltage and the AD8422 was a perfect choice.
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by AD8422- REVIEW, 17 Dec 13
SUPERB ADI PRODUCT !
Another superb ADI product ! The only suggestions I would make are to have a lower input voltage, such as 3V. 3.6V makes it useless for 3.3V digital systems.
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by Mauro, 17 Dec 13
Very good rail-to-rail amplifier
Excellent perfomance and fully suitable for instruments application
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by AM, 8 Nov 13
Excellent INA
Great output stability under varying temperature. Beware of gain resistor current at high gain.
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by docentore, 5 Aug 13
project ine
good product. Does what supposed to. Probably will use in final product
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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