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  4. AD8237


Overview

Features and Benefits

  • Gain set with 2 external resistors
    Can achieve low gain drift at all gains
  • Ideal for battery powered instruments
    Supply current: 115 μA
    Rail-to-rail input and output
    Zero input crossover distortion
  • Designed for excellent dc performance
    Minimum CMRR: 106 dB
    Maximum offset voltage drift:
    0.3 μV/°C
    See data sheet for additional features
  • Bandwidth mode pin (BW) to adjust compensation
  • 8 kV HBM ESD rating
  • RFI filter on-chip
  • Single-supply operation:
    1.8 V to 5.5 V
  • 8-lead MSOP package

Product Details

The AD8237 is a micropower, zero drift, rail-to-rail input and output instrumentation amplifier. The relative match of two resistors sets any gain from 1 to 1000. The AD8237 has excellent gain accuracy performance that can be preserved at any gain with two ratio-matched resistors.

The AD8237 employs the indirect current feedback architecture to achieve a true rail-to-rail capability. Unlike conventional in-amps, the AD8237 can fully amplify signals with common-mode voltage at or even slightly beyond its supplies. This enables applications with high common-mode voltages to use smaller supplies and save power.

The AD8237 is an excellent choice for portable systems. With a minimum supply voltage of 1.8 V, a 115 μA typical supply current, and wide input range, the AD8237 makes full use of a limited power budget, yet offers bandwidth and drift performance suitable for bench-top systems.

Applications

  • Bridge amplification
  • Pressure measurement
  • Medical instrumentation
  • Thermocouple interface
  • Portable systems
  • Current measurement

AD8237 wins 2012 Hot 100 Award from EDN!

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Documentation & Resources

  • View All (13)
  • Data Sheets (1)
  • Application Notes (1)
  • User Guides (1)
  • Technical Books (1)
  • Circuit Note (1)
  • Videos (3)
  • Press Releases (1)
  • Rarely Asked Questions (2)
  • Technical Articles (2)
  • 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.

    To launch ready-to-run LTspice demonstration circuits for this part:

    Step 1: Download and install LTspice on your computer.

    Step 2: Click on the link in the section below to download a demonstration circuit.

    Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

    LTspice

    Models for the following parts are available in LTspice:

    AD8237

    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 (2)

    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
    AD8237ARMZ Material Declaration Reliability Data 8-Lead MSOP
    AD8237ARMZ-R7 Material Declaration Reliability Data 8-Lead MSOP
    AD8237ARMZ-RL Material Declaration Reliability Data 8-Lead MSOP
    Wafer Fabrication Data

    Sample & Buy


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    Evaluation Boards

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    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    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.