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AD8237

RECOMMENDED FOR NEW DESIGNS

Micropower, Zero Drift, True Rail-to-Rail Instrumentation Amplifier

Data Sheet (Rev. 0) Product Selection Table

Part Models: 3
1ku List Price: Starting From $1.14

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Overview

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

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

Part Models: 3
1ku List Price: Starting From $1.14

Documentation

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD8237ARMZ	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD8237ARMZ-R7	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD8237ARMZ-RL	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice 1

LTspice Single Channel Voltage, Current, and Biosignal Measurement - Noise Optimized

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.

Open Tool

SPICE Model 1

AD8237 SPICE Macro Model

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

AD8237 and AD8420 Evaluation Board

Buy Now View Details

Product Details

The EVAL-INAMP-ICF-RMZ offers users the option of evaluating the AD8237 or the AD8420 indirect current feedback (ICF) instrumentation amplifiers individually or connected to adjacent boards in an application. This evaluation board ships with both instrumentation amplifiers in surface-mount MSOP packages.

Reference Quick Start section of user guide UG-513 to get started.