Add to Signal Chain Designer

AD623:  Single Supply, Rail-Rail, Low Cost Instrumentation Amplifier

Product Details


The AD623 is an integrated single-supply instrumentation amplifier that delivers rail-to-rail output swing on a 3 V to 12 V supply. The AD623 offers superior user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pinout configuration. With no external resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed for gains up to 1000.

The AD623 holds errors to a minimum by providing superior ac CMRR that increases with increasing gain. Line noise, as well as line harmonics, are rejected because the CMRR remains constant up to 200 Hz. The AD623 has a wide input common-mode range and can amplify signals that have a common-mode voltage 150 mV below ground. Although the design of the AD623 was optimized to operate from a single supply, the AD623 still provides superior performance when operated from a dual voltage supply (±2.5 V to ±6.0 V).

Low power consumption (1.5 mW at 3 V), wide supply voltage range, and rail-to-rail output swing make the AD623 ideal for battery-powered applications. The rail-to-rail output stage maximizes the dynamic range when operating from low supply voltages. The AD623 replaces discrete instrumentation amplifier designs and offers superior linearity, temperature stability, and reliability in a minimum of space.

Applications

  • Low power medical instrumentation
  • Transducer interfaces
  • Thermocouple amplifiers
  • Industrial process controls
  • Difference amplifiers
  • Low power data acquisition
  • Data Sheet, Rev D, 07/2008

    FEATURES and BENEFITS

    • Easy to use
    • Higher performance than discrete design
    • Single-supply and dual-supply operation
    • Rail-to-rail output swing
    • Input voltage range extends 150 mV below ground (single supply)
    • Low power, 550 µA max supply current
    • Gain set with one external resistor, gain range 1 (no resistor) to 1,000
    • High Accuracy DC Performance
      0.10% gain accuracy (G = 1)
      0.35% gain accuracy (G >1)
      10 ppm gain drift (G = 1)
      25 nA maximum input bias current
    • Excellent AC Specifications
      90 dB minimum CMRR (G = 10); 70 dB minimum CMRR (G = 1) at 60 Hz, 1kΩ source imbalance)
      800 kHz bandwidth (G = 1)
      20 µs settling time to 0.01% (G = 10)
    • Noise
      35 nV/√vHz RTI noise @ 1 kHz (G = 1)

    Pin Configuration Diagram for AD623

    AD623 Diagram
    Pin Configuration Diagram for AD623

    Documentation

    Title Content Type File Type
    AD623: Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier Data Sheet  (Rev D, 07/2008) (pdf, 1429 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
    Low Power, Low Cost, Wireless ECG Holter Monitor Technical Articles HTML
    ICs for Low Power, Low Cost ECG Holter Monitors Support Standard Medical Wireless Bands 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
    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
    AD623SPICE Macro-Model SPICE Models HTML
    AD623 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.

    SampleSample & Buy

    Price, packaging, availability

    AD623 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD623ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $2.16 $1.85 Y  Material Info PCN Purchase
    AD623AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.00 $1.61 N  Material Info PCN Purchase
    AD623AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 $2.00 $1.61 N  Material Info PCN Purchase
    AD623ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.76 $1.43 Y  Material Info PCN Purchase
    AD623ARMZ-REEL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $1.43 Y  Material Info PCN Purchase
    AD623ARMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $1.43 Y  Material Info PCN Purchase
    AD623ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.76 $1.43 Y  Material Info PCN Purchase
    AD623ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 $1.76 $1.43 Y  Material Info PCN Purchase
    AD623ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.43 Y  Material Info PCN Purchase
    AD623BNZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $3.36 $2.86 Y  Material Info PCN Purchase
    AD623BR Status: Obsolete 8 ld SOIC 8 Ind Tube, 98 - - N  Material Info PCN/PDN Contact ADI
    AD623BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.20 $2.72 Y  Material Info PCN Purchase
    AD623BRZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 $3.20 $2.72 Y  Material Info PCN Purchase
    AD623BRZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.72 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/
    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.

    Check Inventory & Purchase

    View Sales and Distribution Offices

    沪ICP备09046653号
    content here.
    content here.

    Review this Product

    Close