Buffer (follower) circuit



This design is used to buffer signals by presenting a high input impedance and a low output impedance. This circuit is commonly used to drive low-impedance loads, analog-to-digital converters (ADC) and buffer reference voltages. The output voltage of this circuit is equal to the input voltage.
  • Input: ±10 V
  • Output: ±10 V
  • Frequency: 100 kHz
  • Supply: ±15 V
General-purpose op amps
LM7332 Dual, 32-V, 19-MHz operational amplifier LPV511 Single, 12-V, 27-kHz operational amplifier
Precision op amps (Vos<1mV)
OPA192 High-Voltage, Rail-to-Rail Input/Output, 5µV, 0.2µV/˚C, Precision Operational Amplifier
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Technical documentation

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Type Title Date
* Circuit design Buffer (follower) circuit (Rev. A) PDF | HTML 14 Jan 2019
Application note AN-31 Amplifier Circuit Collection (Rev. D) 21 Oct 2020
Application note Handbook of Operational Amplifier Applications (Rev. B) 19 Sep 2016
Application note Buffer Op Amp to ADC Circuit Collection 18 Mar 2002

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