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CIRCUIT060019

Inverting op amp with non-inverting positive reference voltage circuit

CIRCUIT060019

Overview

This design uses an inverting amplifier with a non-inverting positive reference voltage to translate an input signal of –1 V to 2 V to an output voltage of 0.05 V to 4.95 V. This circuit can be used to translate a sensor output voltage with a positive slope and negative offset to a usable ADC input voltage range.
Features
  • Single 5-V supply
  • Input: -1 V to 2 V
  • Output: 20 mV to 4.95 V
General-purpose op amps
TLV9001 — One-channel, 1-MHz rail-to-rail input and output 1.8-V to 5.5-V operational amplifier
Precision op amps (Vos<1mV)
OPA376 — Precision (0.025mV), low noise (7.5nV/rtHz), low quiescent current (760uA) op amp
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Technical documentation

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Type Title Date
* Circuit design Inverting op amp with non-inverting positive reference voltage circuit (Rev. A) 04 Feb 2019
E-book Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. C) 18 Dec 2023
Application note Designing Gain and Offset in Thirty Seconds 01 Feb 2002

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