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CIRCUIT060068

Discrete wide bandwidth instrumentation amplifier circuit

CIRCUIT060068

Overview

This design uses three op–amps to build a discrete wide bandwidth instrumentation amplifier. The circuit converts a differential, high frequency signal to a single–ended output.
Features
  • Input: Vi = -0.24 V to 0.24 V
  • Output: Vo = 0.1 V to 4.9 V
  • Bandwidth = 10 MHz
  • Supply:
    • Vcc = 2.5 V
    • Vee = 0 V
    • Vref = 2.5 V
High-speed op amps (GBW ≥ 50 MHz)
OPA354 — 250MHz, Rail-to-Rail I/O, CMOS Single Operational Amplifier
General-purpose op amps
OPA322 — Single, 5.5-V, 20-MHz, 65-mA output current, low noise (8.5-nV/√Hz) operational amplifier
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Technical documentation

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Type Title Date
* Circuit design Discrete Wide Bandwidth INA Circuit (Rev. A) PDF | HTML 23 Dec 2020
Circuit design Three Op Amp Instrumentation Amplifier Circuit (Rev. A) PDF | HTML 30 Mar 2022

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