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  4. AD8220

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Overview

Features and Benefits

  • 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) 

AD8220-EP supports defense and aerospace applications (AQEC standard)

  • Download AD8220-EP data sheet (pdf)
  • Military temperature range (−55°C to +125°C)
  • Controlled manufacturing baseline
  • One assembly/test site
  • One fabrication site
  • Enhanced product change notification
  • Qualification data available on request
  • V62/17607 DSCC Drawing Number

Qualified for Automotive Applications

  • 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)

Product Details

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 for the A and B grade is specified over the industrial temperature range of −40°C to +85°C, and the W grade is specified over the automotive temperature range of −40°C to +125°C.

Applications

  • Medical instrumentation
  • Precision data acquisition
  • Transducer interfaces

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Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (3)
  • Application Notes (1)
  • User Guides (1)
  • Technical Books (1)
  • Circuit Note (1)
  • Technical Articles (10)
    • Document Type
    Technical Articles

    Tools & Simulations

    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    LTspice

    Models for the following parts are available in LTspice:

    AD8220

    In-Amp Diamond Plot Tool

    The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.

    In Amp Diamond Tool

    SPICE Models

    Reference Designs (1)

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    AD8220ARMZ Material Declaration Reliability Data 8-Lead MSOP
    AD8220ARMZ-R7 Material Declaration Reliability Data 8-Lead MSOP
    AD8220BRMZ Material Declaration Reliability Data 8-Lead MSOP
    AD8220BRMZ-R7 Material Declaration Reliability Data 8-Lead MSOP
    AD8220BRMZ-RL Material Declaration Reliability Data 8-Lead MSOP
    AD8220TRMZ-EP Material Declaration Reliability Data 8-Lead MSOP
    AD8220TRMZ-EP-R7 Material Declaration Reliability Data 8-Lead MSOP
    AD8220WARMZ Material Declaration Reliability Data 8-Lead MSOP
    AD8220WARMZ-R7 Material Declaration Reliability Data 8-Lead MSOP
    AD8220WARMZ-RL Material Declaration Reliability Data 8-Lead MSOP
    Wafer Fabrication Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • AD8220ARMZ Production
    • AD8220ARMZ-R7 Production
    • AD8220BRMZ Production
    • AD8220BRMZ-R7 Production
    • AD8220BRMZ-RL Production
    • AD8220WARMZ Production
    • AD8220WARMZ-RL Production

    Support & Discussions

    AD8220 Discussions

    RE: AD8220 shift phase
    17 week(s) ago in Instrumentation Amplifiers
    All AD8220 Discussions
    AD8220 Contact ADI Technical Support »
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    AD8220 Contact ADI Technical Support » AD8220 Ask your question »

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