TIPD191

Instrumentation Amplifier with DC Rejection Reference Design

TIPD191

Design files

Overview

This design is an ac coupled instrumentation amplifier. More specifically, the circuit amplifies ac differential input signals and rejects dc differential and common mode signals. The input is dc coupled, so it achieves effective ac coupling by shifting the instrumentation amplifier reference voltage to cancel output offset.

Features
  • ac coupled INA
  • Maintains excellent CMRR
  • Rejects dc and slow moving offsets
  • Adjustable lower cutoff frequency
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDCAD7.ZIP (704 K)

Detailed schematic diagram for design layout and components

TIDRF10.PDF (327 K)

Detailed schematic diagram for design layout and components

TIDRF11.PDF (205 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

Products

Includes TI products in the design and potential alternatives.

Instrumentation amplifiers

INA128Precision, 130-dB CMRR, 700-µA, Low-Power, Instrumentation Amplifier

Data sheet: PDF | HTML
Precision op amps (Vos<1mV)

OPA188Precision, Low-Noise, Rail-to-Rail Output, 36V Zero-Drift Operational Amplifier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* User guide Instrumentation Amplifier With DC Rejection Design Guide May 14, 2015

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