CIRCUIT060015

Adjustable reference voltage circuit

CIRCUIT060015

Overview

This circuit combines an inverting and non-inverting amplifier to make a reference voltage adjustable from the negative of the input voltage up to the input voltage. Gain can be added to increase the maximum negative reference level.
Features
  • Dual +/- 15-V supply
  • Input: 10 V
  • Output: 0 V to 10 V
Precision op amps (Vos<1mV)
OPA277 Dual, 36-V, 10µV offset, 0.1µV/˚C drift, bipolar, operational amplifier
General-purpose op amps
OPA172 Single, 36-V, 10-MHz, low-power operational amplifier

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Technical documentation

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Type Title Date
* Application note Adjustable reference voltage circuit Jan. 09, 2019
E-book Tips and tricks for designing with voltage references (Rev. A) May 07, 2021
E-book Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. A) Feb. 18, 2019
Application note Make a -10V to +10V Adjustable Precision Voltage Source (Rev. A) May 18, 2015

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