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AD622:  Low Cost Instrumentation Amplifier

Product Details

The AD622 is a low cost, moderately accurate instrumentation amplifier in the traditional pin configuration that requires only one external resistor to set any gain between 2 and 1000. For a gain of 1, no external resistor is required. The AD622 is a complete difference or subtractor amplifier system that also provides superior linearity and common-mode rejection by incorporating precision laser-trimmed resistors.

The AD622 replaces low cost, discrete, two or three op amp instrumentation amplifier designs and offers good common-mode rejection, superior linearity, temperature stability, reliability, power, and board area consumption. The low cost of the AD622 eliminates the need to design discrete instrumentation amplifiers to meet stringent cost targets. While providing a lower cost solution, it also provides performance and space improvements.


  • Transducer interface
  • Low cost thermocouple amplifier
  • Industrial process controls
  • Difference amplifier
  • Low cost data acquisition


  • Easy to use
  • Low cost solution
  • Higher performance than two or three op amp design
  • Unity gain with no external resistor
  • Optional gains with one external resistor
    (Gain range: 2 to 1000)
  • Wide power supply range: ±2.6 V to ±15 V
  • Available in 8-lead PDIP and 8-lead SOIC_N packages
  • Low power, 1.5 mA maximum supply current
  • DC performance
    0.15% gain accuracy: G = 1
    125 μV maximum input offset voltage
    1.0 μV/°C maximum input offset drift
    5 nA maximum input bias current
    66 dB minimum common-mode rejection ratio: G = 1
  • Noise
    12 nV/√Hz @ 1 kHz input voltage noise
    0.60 μV p-p noise: 0.1 Hz to 10 Hz, G = 10
  • AC characteristics
    800 kHz bandwidth: G = 10
    10 μs settling time to 0.1% @ G = 1 to 100
    1.2 V/μs slew rate

Pin Configuration Diagram for AD622


Title Content Type File Type
AD622: Low Cost Instrumentation Amplifier Data Sheet (Rev E, 06/2012) (pdf, 151 kB) Data Sheets PDF
AN-282: Fundamentals of Sampled Data Systems  (pdf, 2131 kB) Application Notes PDF
AN-244: A User's Guide to I.C. Instrumentation Amplifiers  (pdf, 522 kB) Application Notes PDF
AN-245: Instrumentation Amplifiers Solve Unusual Design Problems  (pdf, 543 kB)
Traditionally Considered Only for Transducer-Conditioning Applications, Instrumentation Amplifiers Bring Unique Performance Benefits to a Range of Other Applications as Well.
Application Notes PDF
AN-671: Reducing RFI Rectification Errors in In-Amp Circuits  (pdf, 208 kB) Application Notes PDF
AN-589: Ways to Optimize the Performance of a Difference Amplifier  (pdf, 115 kB)
This Application Note presents several ways to build and optimize the performance of a discrete difference amplifier. It also recommends amplifiers that will make the overall solution cost/performance competitive with monolithic instrument amplifiers.
Application Notes PDF
A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
UG-261: Evaluation Boards for the AD62x, AD822x and AD842x Series  (pdf, 604 kB) User Guides PDF
Auto-Zero Amplifiers  (doc, 75 kB)
A wide variety of electronic applications, especially those involving very small input signals, require signal paths with very low offset voltage and offset voltage drift over time and temperature.
Technical Articles DOC
High-performance Adder Uses Instrumentation Amplifiers
Make an adder circuit using instrumentation amplifiers to increase input impedance.
(EDN, 9/3/2009)
Technical Articles HTML
Input Filter Prevents Instrumentation-amp RF-Rectification Errors
by Charles Kitchin, Lew Counts, and Moshe Gerstenhaber, Analog Devices, Inc. (EDN, 11/13/2003)
Technical Articles HTML
The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers  (pdf, 582 kB) Technical Articles PDF
Applying Instrumentation Amplifiers Effectively: The Importance of an Input Ground Return  (pdf, 508 kB) Technical Documentation PDF
Leading Inside Advertorials: Applying Instrumentation Amplifiers Effectively–The Importance of an Input Ground Return  (pdf, 121 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
In-Amp Error Calculator
These tools will help estimate error contributions in your instrumentation amplifier circuit. It uses input parameters such as temperature, gain, voltage input, and source impedance to determine the errors that can contribute to your overall design.
Design Calculators HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD622 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD622ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $3.17 $2.69 Y  Material Info PCN Purchase
AD622AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.40 $2.89 N  Material Info PCN Purchase
AD622AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $3.40 $2.89 N  Material Info PCN Purchase
AD622ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.02 $2.56 Y  Material Info PCN Purchase
AD622ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $3.02 $2.56 Y  Material Info PCN Purchase
AD622ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.56 Y  Material Info PCN Purchase
Price Table Help

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.

AD62x, AD822x, AD842x Series InAmp Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-INAMP-62RZ Status: Production AD620/621/AD622/623/627/AD8223 SOIC Eval Board $40.23 Yes -
EVAL-INAMP-ICF-RMZ Status: Production AD8420/AD8237 MSOP Eval Board $34.58 Yes -
EVAL-INAMP-82RMZ Status: Production AD8220/8221/8226/8227/8228/8236/8421/8422 MSOP Eval Board $34.49 Yes -
EVAL-INAMP-82RZ Status: Production AD8221/8226/8227/8228/8229/8421/8422/8428/8429 SOIC Eval Board $34.49 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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