Adjustable reference voltage circuit



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.
  • 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
LM2902B Quad 36-V 1.2-MHz operational amplifier LM2902B-Q1 Automotive, quad 36-V 1.2-MHz operational amplifier LM2904BA-Q1 Automotive, dual, 36-V, 1.2-MHz, 2-mV offset voltage operational amplifier LM324B Quad, 36-V, 1.2-MHz 3-mV offset voltage operational amplifier OPA172 Single, 36-V, 10-MHz, low-power operational amplifier OPA4991-EP Enhanced-product, quad, 40-V 4.5-MHz rail-to-rail input and output operational amplifier
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Technical documentation

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Type Title Date
* Circuit design Adjustable reference voltage circuit 09 Jan 2019
E-book Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. B) 05 Oct 2022
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
Application note Make a -10V to +10V Adjustable Precision Voltage Source (Rev. A) 18 May 2015

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