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AD8226:  Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier

Product Details

Product Status:Recommended for New Designs

The AD8226 is a low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain between 1 and 1000.

The AD8226 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the signal to make full use of the supply rails. Because the input range also includes the ability to go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8226 operates on supplies ranging from ±1.35 V to ±18 V for dual supplies and 2.2 V to 36 V for single supply.

The robust AD8226 inputs are designed to connect to real-world sensors. In addition to its wide operating range, the AD8226 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open wire detection.

The AD8226 is perfect for multichannel, space-constrained industrial applications. Unlike other low cost, low power instrumentation amplifiers, the AD8226 is designed with a minimum gain of 1 and can easily handle ±10 V signals. With its MSOP package and 125°C temperature rating, the AD8226 thrives in tightly packed, zero airflow designs.

The AD8226 is available in 8-lead MSOP and SOIC packages, and is fully specified for −40°C to +125°C operation.

For a device with a similar package and performance as the AD8226 but with gain settable from 5 to 1000, consider using the AD8227.

Applications

  • Industrial process controls
  • Bridge amplifiers
  • Medical instrumentation
  • Portable data acquisition
  • Multichannel systems
  • Data Sheet, Rev A, 7/2009

    FEATURES and BENEFITS

    • Chinese data sheet available
    • Gain set with 1 external resistor
         Gain range: 1 to 1000
    • Input voltage goes below ground
    • Inputs protected beyond supplies
    • Very wide power supply range
         Single supply: 2.2 V to 36 V
         Dual supplies: ±1.35 V to ±18 V
    • Bandwidth (G = 1): 1.5 MHz
    • CMRR (G = 1): 90 dB minimum for BR models
    • Input noise: 22 nV/√Hz
    • Typical supply current: 350 μA
    • Specified temperature: −40°C to +125°C
    • 8-lead SOIC and MSOP packages

    AD8226 Pin Configuration Diagram

    Additional Information

    For additional ADI Healthcare Products and related information, please visit www.analog.com/healthcare.

    Documentation

    Title Content Type File Type
    AD8226: Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier Data Sheet (Rev C, 09/2012) (pdf, 533 kB) Data Sheets PDF
    CN-0251: A Flexible 4-Channel Analog Front End for Wide Dynamic Range Signal Conditioning  (pdf, 253 kB) Circuit Note PDF
    CN0295:Flexible, 4 mA-to-20 mA Pressure Sensor Transmitter with Voltage or Current Drive  (pdf, 242 kB) Circuit Note PDF
    CN-0289: Flexible, 4 mA-to-20 mA, Loop-Powered Pressure Sensor Transmitter with Voltage or Current Drive  (pdf, 273 kB) Circuit Note PDF
    CN-0253: A Robust, Low Power, Battery Monitoring Circuit Front End  (pdf, 128 kB) Circuit Note PDF
    CN-0213:Complete High Speed, High CMRR Precision Analog Front End for Process Control  (pdf, 288 kB) Circuit Note 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
    MS-2178: Discussion Between CareFusion and Analog Devices: Optimizing Performance and Lowering Power in an EEG Amplifer  (pdf, 147 kB) Technical Articles PDF
    MS-2160: Mitigation Strategies for ECG Design Challenges  (pdf, 205 kB) Technical Articles PDF
    High-performance Adder Uses Instrumentation Amplifiers
    Make an adder circuit using instrumentation amplifiers to increase input impedance.
    (EDN, 9/3/2009)
    Technical Articles HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    AD8226 SPICE Macro Model SPICE 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

    AD8226 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD8226ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.25 $1.05 Y  Material Info PCN Purchase Sample
    AD8226ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $1.05 Y  Material Info PCN Purchase
    AD8226ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $1.05 Y  Material Info PCN Purchase
    AD8226ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.25 $1.05 Y  Material Info PCN Purchase Sample
    AD8226ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.05 Y  Material Info PCN Purchase
    AD8226ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.05 Y  Material Info PCN Purchase
    AD8226BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $2.07 $1.74 Y  Material Info PCN Purchase
    AD8226BRMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $1.74 Y  Material Info PCN Purchase
    AD8226BRMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $1.74 Y  Material Info PCN Purchase
    AD8226BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.07 $1.74 Y  Material Info PCN Purchase
    AD8226BRZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.74 Y  Material Info PCN Purchase
    AD8226BRZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.74 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

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