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AD8237
RECOMMENDED FOR NEW DESIGNSMicropower, Zero Drift, True Rail-to-Rail Instrumentation Amplifier
- Part Models
- 3
- 1ku List Price
- Starting From $1.14
Part Details
- 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
AD8237 wins 2012 Hot 100 Award from EDN!
Documentation
Data Sheet 1
User Guide 1
Application Note 2
Video 3
Technical Book 1
Analog Dialogue 2
Rarely Asked Question Page 2
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 | ||
| AD8237ARMZ-R7 | 8-Lead MSOP | ||
| AD8237ARMZ-RL | 8-Lead MSOP |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
LTspice 2
- LTspice Single Channel Voltage, Current, and Biosignal Measurement - Noise Optimized
- AD8237 - Amplifiers
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 ToolSPICE Model 1
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
Resources
Reference Designs
Configurable 4-20 mA Loop Powered Transmitter/Receiver using a Micropower Instrumentation Amplifier