TIPD136

Active Volume Control for Professional Audio

TIPD136

Design files

Overview

This TI Verified Design implements a split-supply, high-performance volume control which attenuates a professional line-level audio signal with minimal distortion and noise. An input buffer preserves the behavior of the system independent of the audio input source impedance. A radio frequency (RF) filter on the circuit front end removes noise from outside the audio band, while a bidirectional transient voltage suppressor (TVS) diode protects against overvoltage spikes.

Features
  • Input and Output: Professional line-level audio signal (+4 dBu / 1.228 VRMS)
  • Includes RF filter and over voltage protection
  • THD+N at 1 kHz: < 0.0005% (-106 dB)
  • Gain deviation (30% to 100% potentiometer rotation): ±1.5 dB
  • Supply voltage: ±15 V
  • Utilizes OPA1604 High-Performance Audio  Operational Amplifier

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDR328.PDF (85 K)

Detailed schematic diagram for design layout and components

TIDC032.ZIP (2424 K)

Detailed schematic diagram for design layout and components

TIDR329.PDF (145 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC223.ZIP (1977 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

Audio op amps

OPA1604Quad, SoundPlus High-Performance, Bipolar-Input Audio Op Amp

Data sheet document-pdfAcrobat PDF

Start development

Software

Support software

TIPD136 Simulation – TIDC224.ZIP (50 K)

Support software

TIPD136 Test Files – TIDC225.ZIP (184 K)

Technical documentation

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Type Title Date
* User guide Active Volume Control for Professional Audio Design Guide Jan. 08, 2014

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