AD8237
Micropower, Zero Drift, True Rail-to-Rail Instrumentation Amplifier
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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
Product Categories
Markets and Technologies
AD8237 wins 2012 Hot 100 Award from EDN!
Product Lifecycle
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
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AN-1401: Instrumentation Amplifier Common-Mode Range: The Diamond Plot (Rev. 0)10/14/2016PDF656 K
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Understanding and Eliminating 1/f Noise5/1/2017 Analog Dialogue
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How to Stay Out of Deep Water when Designing with Bridge Sensors1/1/2014 Analog Dialogue
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.
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.
SPICE Models
CIR
AD8237 SPICE Macro Model
4.56 K
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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Buy Now Pricing
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List Pricing
(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
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.