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AD620:  Low Drift, Low Power Instrumentation Amp with Set Gains of 1 to 10000

Product Details


Newer Alternatives:
  • Looking for a high performance in-amp with lower noise, wider bandwidth, and fast settling time? Consider the AD8421.
  • Looking for a high performance in-amp with lower power and a rail-to-rail output? Consider the AD8422.

The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery powered, portable (or remote) applications.

The AD620, with its high accuracy of 40 ppm maximum nonlinearity, low offset voltage of 50 µV max, and offset drift of 0.6 µV/°C max, is ideal for use in precision data acquisition systems, such as weigh scales and transducer interfaces. Furthermore, the low noise, low input bias current, and low power of the AD620 make it well suited for medical applications such as ECG and noninvasive blood pressure monitors.

The low input bias current of 1.0 nA max is made possible with the use of Superϐeta processing in the input stage. The AD620 works well as a preamplifier due to its low input voltage noise of 9 nV/√Hz at 1 kHz, 0.28 μV p-p in the 0.1 Hz to 10 Hz band, and 0.1 pA/√Hz input current noise. Also, the AD620 is well suited for multiplexed applications with its settling time of 15 μs to 0.01%, and its cost is low enough to enable designs with one in-amp per channel.

FEATURES and BENEFITS

  • Chinese data sheet available
  • EASY TO USE
    Gain Set with One External Resistor
    (Gain Range 1 to 10,000)
    Wide Power Supply Range (±2.3 V to ±18 V)
    Higher Performance than Three
    Op Amp IA Designs
    Available in 8-Lead DIP and SOIC Packaging
    Low Power, 1.3 mA max Supply
  • LOW NOISE
    9 nV/√Hz, @ 1 kHz, Input Voltage Noise
    0.28 µV p-p Noise (0.1 Hz to 10 Hz)
  • EXCELLENT DC PERFORMANCE (B GRADE)
    50 µV max, Input Offset Voltage
    0.6 µV/°C max, Input Offset Drift
    1.0 nA max, Input Bias Current
    100 dB min Common-Mode
    Rejection Ratio (G = 10)
  • EXCELLENT AC SPECIFICATIONS
    120 kHz Bandwidth (G = 100)
    15 µs Settling Time to 0.01%

Pin Configuration Diagram for AD620

Documentation

Title Content Type File Type
AD620: Low Cost, Low Power Instrumentation Amplifier Data Sheet (Rev H, 07/2011) (pdf, 782 kB) Data Sheets PDF
AD620: Military Data Sheet (Rev A, 01/1992) (pdf, 1308 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
ECG Front-End Design is Simplified with MicroConverter®
By Enrique Company-Bosch and Eckart Hartmann, Analog Devices, Inc. (Analog Dialogue, Vol 37, November 2003)
Analog Dialogue HTML
Low-Power, Low-Voltage IC Choices for ECG System Requirements
(Analog Dialogue, Vol. 29, No. 3, 1995)
Analog Dialogue HTML
Ask The Applications Engineer-10
(Analog Dialogue, 30th Anniversary Reader Bonus)
Analog Dialogue HTML
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
Protecting Instrumentation Amplifiers  (pdf, 474 kB)
... All data acquisition board designs have to contend with ESD, EMI, and overvoltages. Can one solution protect the circuitry against all three hazards?
(First published in the April 2000 issue of Sensors Magazine)
Technical Articles PDF
Low-Power, Low-Voltage IC Choices for ECG System Requirements
(Analog Dialogue, Vol. 29, No. 3, 1995)
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
ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
(Revised 1/03)
Invites Customer Participation in Creative Mil/Aero System Solutions
Recommended Reading PDF
Space Qualified Parts List  (pdf, 93 kB)
This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
Aerospace Information 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
AD620 SPICE Macro-Model SPICE Models HTML
AD620 SABER Macro-Model SABER Models 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.

Product Recommendations & Reference Designs

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Price, packaging, availability

AD620 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD620ACHIPS Status: Production CHIPS OR DIE 0 Ind Tray, 140 - - Y  Material Info PCN Contact ADI
AD620AN Status: Production 8 ld PDIP 8 Ind Tube, 50 $4.82 $4.09 N  Material Info PCN Purchase
AD620ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $4.06 $3.45 Y  Material Info PCN Purchase
AD620AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.73 $4.01 N  Material Info PCN Purchase
AD620AR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $4.01 N  Material Info PCN/PDN Purchase
AD620AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 - $4.01 N  Material Info PCN Purchase
AD620ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.98 $3.38 Y  Material Info PCN Purchase
AD620ARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $3.38 Y  Material Info PCN Purchase
AD620ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $3.98 $3.38 Y  Material Info PCN Purchase
AD620BN Status: Production 8 ld PDIP 8 Ind Tube, 50 $7.24 $6.14 N  Material Info PCN Purchase
AD620BNZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $6.09 $5.17 Y  Material Info PCN Purchase
AD620BR Status: Production 8 ld SOIC 8 Ind Tube, 98 $7.10 $6.02 N  Material Info PCN Purchase
AD620BR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $6.02 N  Material Info PCN Purchase
AD620BR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 - $6.02 N  Material Info PCN Purchase
AD620BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $5.97 $5.07 Y  Material Info PCN Purchase
AD620BRZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 750 - $5.07 Y  Material Info PCN Purchase
AD620BRZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $5.07 Y  Material Info PCN Purchase
AD620SQ/883B Status: Production 8 ld CerDIP 8 Mil Tube, 48 $25.73 $23.15 N  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/
Purchase/Sample
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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