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AD8227

PRODUCTION

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

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Gain set with 1 external resistor
    Gain range: 5 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 supply: ±1.5 V to ±18 V
  • Bandwidth (G = 5): 250 kHz
  • CMRR (G = 5): 100 dB minimum (B Grade)
  • Input noise: 24 nV/√Hz
  • Typical supply current: 350 μA
  • Specified temperature: −40°C to +125°C
  • 8-lead SOIC and MSOP packages

The AD8227 is a low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain between 5 and 1000. The AD8227 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 can also go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8227 operates on supplies ranging from ±1.5 V to ±18 V (2.2 V to 36 V single supply).

The robust AD8227 inputs are designed to connect to real-world sensors. In addition to its wide operating range, the AD8227 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 AD8227 is ideal for multichannel, space-constrained applications. With its MSOP package and 125°C temperature rating, the AD8227 thrives in tightly packed, zero airflow designs.

The AD8227 is available in 8-pin MSOP and SOIC packages. It is fully specified for −40°C to +125°C operation.

For a similar instrumentation amplifier with a gain range of 1 to 1000, see the AD8226.


Applications
  • Industrial process controls
  • Bridge amplifiers
  • Medical instrumentation
  • Portable data acquisition
  • Multichannel systems

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    AD8227
    Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier
    AD8227 Pin Configuration
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    Documentation

    Data Sheet 1

    User Guide 1

    Application Note 2

    Technical Articles 2

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    Software Resources

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    Tools & Simulations

    LTspice

    Models for the following parts are available in LTspice:

    • AD8227

    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.

    Open Tool

    SPICE Model 1

    Signal Chain Designer

    Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

    Open Tool
    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.

    Evaluation Kits

    eval board
    schematic 1
    schematic 2
    schematic 3
    EVAL-INAMP

    AD62x, AD822x, AD842x Series InAmp Evaluation Board

    Buy Now View Details

    Product Details

    Analog Devices provides a line of evaluation boards designed to help users evaluate our instrumentation amplifiers in 8 pin packages. Access the user guide UG-261.

    This user guide describes three generic evaluation boards that can be used to evaluate many of Analog Devices instrumentation amplifiers. For information on the performance of a specific instrumentation amplifier, see the data sheet for that instrumentation amplifier.

    • 3 generic, easy-to-use evaluation boards
      • Shipped with an assortment of Analog Devices in-amps
      • Solder in the in-amp to be tested
      • Test pins already populated
      • Decoupling capacitors already populated
    • EVAL-INAMP-62RZ board: Compatible with AD620, AD621, AD622, AD623, AD627, AD8223, AD8225,  LT1167, LT1168 and LT6370 in SOIC or PDIP
    • EVAL-INAMP-82RZ board: Compatible with AD8221, AD8226, AD8227, AD8228, AD8229, AD8421, AD8428, and AD8429 in SOIC package
    • EVAL-INAMP-82RMZ board: Compatible with AD8220, AD8221, AD8226, AD8227, AD8228, AD8236, and AD8421 in MSOP package
    EVAL-INAMP
    AD62x, AD822x, AD842x Series InAmp Evaluation Board
    InAmp Evaluation Board InAmp Evaluation Board - Bottom View InAmp Evaluation Board - Top View

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