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CIRCUIT060021

Buffer (follower) circuit

CIRCUIT060021

Overview

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.
Features
  • 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

Related design resources

Design tools & simulation

SIMULATION TOOL
PSPICE-FOR-TI — PSpice® for TI design and simulation tool TINA-TI — SPICE-based analog simulation program
CALCULATION TOOL
ANALOG-ENGINEER-CALC — Analog engineer's calculator

Reference designs

REFERENCE DESIGN
TIPD128 — Capacitive Load Drive Verified Reference Design Using an Isolation Resistor

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