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CIRCUIT060057

Low-pass filtered non-inverting amplifier circuit

CIRCUIT060057

Overview

This low-pass non-inverting circuit amplifies the signal level by 20 V/V (26 dB) and filters the signal by setting the pole at 10 kHz. Components R1 and C1 create a low-pass filter on the non-inverting pin. The frequency response of this circuit is the same as that of a passive RC filter, except that the output is amplified by the pass-band gain of the amplifier. Components C2 and R3 are used to set the cutoff frequency, fc, of the non-inverting amplifier.
Features
  • Input: Vi = -0.1 V to 0.1 V
  • Output: Vo = -2 V to 2 V
  • BW: fc = 10 kHz
  • Supply:
    • Vcc = 2.5 V
    • Vee = -2.5 V
General-purpose op amps
OPA375 — OPAx375, 500uV, 10-MHz, Low Broadband Noise, RRO, Operational Amplifier TLV9001 — One-channel, 1-MHz rail-to-rail input and output 1.8-V to 5.5-V operational amplifier
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Technical documentation

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Type Title Date
* Circuit design Low-pass, filtered, non-inverting amplifier circuit PDF | HTML 27 Jan 2021
Application note Basic Introduction to Filters - Active, Passive, and Switched-Cap (Rev. A) 21 Apr 2010
Application note More Filter Design on a Budget 06 Dec 2001

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Reference designs

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

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