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AD8220:  JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package

Product Status:   Recommended for New Designs 

The AD8220 is the first single-supply, JFET input instrumentation amplifier available in an MSOP package. Designed to meet the needs of high performance, portable instrumentation, the AD8220 has a minimum common-mode rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR of 80 dB at 5 kHz for G = 1. Maximum input bias current is 10 pA and typically remains below 300 pA over the entire industrial ...More

AD8220:  JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package

Product Description

The AD8220 is the first single-supply, JFET input instrumentation amplifier available in an MSOP package. Designed to meet the needs of high performance, portable instrumentation, the AD8220 has a minimum common-mode rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR of 80 dB at 5 kHz for G = 1. Maximum input bias current is 10 pA and typically remains below 300 pA over the entire industrial temperature range. Despite the JFET inputs, the AD8220 typically has a noise corner of only 10 Hz.

With the proliferation of mixed-signal processing, the number of power supplies required in each system has grown. The AD8220 is designed to alleviate this problem. The AD8220 can operate on a ±18 V dual supply, as well as on a single +5 V supply. Its rail-to-rail output stage maximizes dynamic range on the low voltage supplies common in portable applications. Its ability to run on a single 5 V supply eliminates the need to use higher voltage, dual supplies. The AD8220 draws a maximum of 750 μA of quiescent current, making it ideal for battery powered devices.

Gain is set from 1 to 1000 with a single resistor. Increasing the gain increases the common-mode rejection. Measurements that need higher CMRR when reading small signals benefit when the AD8220 is set for large gains.

A reference pin allows the user to offset the output voltage. This feature is useful when interfacing with analog-to-digital converters.

The AD8220 is available in an MSOP that takes roughly half the board area of an SOIC. Performance is specified over the industrial temperature range of −40°C to +85°C.

Applications

  • LCD gamma and VCOM drivers
  • Medical instrumentation
  • Precision data acquisition
  • Transducer interfaces

    • Data Sheet, Rev. A, 5/07

      • High CMRR
        100 dB CMRR (minimum), G = 10 (B Grade)
        80 dB CMRR (minimum) to 5 kHz, G = 1 (B Grade)
      • Excellent ac specifications and low power
        1.5 MHz bandwidth (G = 1)
        14 nV/√Hz input noise (1 kHz)
        Slew rate: 2 V/μs
        750 μA quiescent supply current (maximum)
      • Low input currents
        10 pA maximum input bias current (B Grade)
        0.6 pA maximum input offset current (B Grade)
      • Versatile
        MSOP package
        Rail-to-rail output
        Input voltage range to below negative supply rail
        4 kV ESD protection
        4.5 V to 36 V single supply
        ±2.25 V to ±18 V dual supply
        Gain set with single resistor (G = 1 to 1000)

    Pin Configuration for AD8220

    View Full Circuit Note Enlarge
    Circuit Benefits and Features:
    • Industrial Control Input Module
    • 4mA to 20mA Current Inputs and Unipolar Input Voltage
    • 24-Bits of Digitally Isolated Resolution
    Products Used in This Circuit
    • AD7793: 3-Channel, Low Noise, Low Power, 24-Bit Sigma Delta ADC with On-Chip In-Amp and Reference
    • AD8220: JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package
    • AD8601: DigiTrim™ RRIO Single Op Amp with Very Low Offset Voltage
    • ADR441: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    • ADUM5401: Quad-Channel Isolators with Integrated DC/DC Converter
    More
    Circuit Design Assistance:
    • Device Drivers
    View Full Circuit Note Enlarge
    Circuit Benefits and Features:
    • Digital Pot and In-Amp Create Programmable Gain In-Amp
    • Low Cost
    • High Voltage
    • Optimized for Low Noise
    Products Used in This Circuit
    • AD5291: Single Channel, 256-Position, 1% R-Tol, Digital Potentiometer with 20-Times Programmable Memory
    • AD5292: Single Channel, 1024-Position, 1% R-Tol, Digital Potentiometer with 20-Times Programmable Memory
    • AD5293: Single Channel, 1024-Position, 1% R-Tol, Digital Potentiometer
    • AD8220: JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package
    • AD8221: Precision Instrumentation Amplifier
    • AD8227: Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier
    More
    Circuit Design Assistance:
    • Device Drivers

    Circuits from the Lab™ reference circuits are engineered and tested for quick and easy system integration to help solve today's analog, mixed-signal, and RF design challenges.

    Budgetary Price & Packaging   |   Samples   |   Check Inventory & Purchase

    AD8220 Model Options
    Model Package Pins Temp.
    Range    		 Packing,
    Qty    		 Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD8220ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $2.82 $2.32 Y  Material Info PCN Purchase Sample
    AD8220ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $2.32 Y  Material Info PCN Purchase
    AD8220ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $2.32 Y  Material Info PCN Purchase
    AD8220BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $4.31 $3.53 Y  Material Info PCN Purchase Sample
    AD8220BRMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $3.53 Y  Material Info PCN Purchase
    AD8220BRMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $3.53 Y  Material Info PCN Purchase
    AD8220WARMZ Status: Production 8 ld MSOP 8 Auto Tube, 50 $3.53 $2.90 Y  Material Info PCN Purchase
    AD8220WARMZ-R7 Status: Production 8 ld MSOP 8 Auto Reel, 1000 $3.53 $2.90 Y  Material Info - Purchase
    AD8220WARMZ-RL Status: Production 8 ld MSOP 8 Auto Reel, 3000 - $2.90 Y  Material Info PCN Purchase
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    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
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    • Automotive: -40 to +125 degrees Celsius
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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.

    AD62x_and_AD822x_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-82RMZ Status: Production AD8220/8221/8226/8227/8228/8236/8421 MSOP Eval Board $34.49 Yes -
    EVAL-INAMP-82RZ Status: Production AD8221/8226/8227/8228/8421 SOIC Eval Board $34.49 Yes -

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