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CIRCUIT060049

AC coupled non-inverting amplifier circuit

CIRCUIT060049

Overview

This circuit amplifies an AC signal, and shifts the output signal so that it is centered at one-half the power supply voltage. Note that the input signal has zero DC offset so it swings above and below ground. The key benefit of this circuit is that it accepts signals which swing below ground even though the amplifier does not have a negative power supply.
Features
  • Input: Vi = -240 mV to 240 mV
  • Output: Vo = 0.1 V to 4.9 V
  • Supply:
    • Vcc = 5 V
    • Vee = 0 V
    • Vref = 5 V
  • Lower cutoff frequency: 16 Hz
  • Upper cutoff frequency: ≥ 1 MHz
  • AC gain: 10 V/V
General-purpose op amps
TLV9062 — Dual, 5.5-V, 10-MHz 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 AC coupled (HPF) non-inverting amplifier circuit (Rev. A) 01 Feb 2019
Application note AN-31 Amplifier Circuit Collection (Rev. D) 21 Oct 2020
Application note Basic Introduction to Filters - Active, Passive, and Switched-Cap (Rev. A) 21 Apr 2010
Analog Design Journal A new filter topology for analog high-pass filters 06 Aug 2008

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Reference designs

REFERENCE DESIGN
TIPD185 — AC Coupled, Single-Supply, Inverting and Non-inverting Amplifier Reference Design

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