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TIPD136

Active Volume Control for Professional Audio

Design files

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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

download Schematic — TIPD136
TIDR328.PDF (85 K)

Detailed schematic diagram for design layout and components

download Schematic — TIPD136
TIDC032.ZIP (2424 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIPD136
TIDR329.PDF (145 K)

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

download Gerber file — TIPD136
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

OPA1604 — Quad, SoundPlus High-Performance, Bipolar-Input Audio Op Amp

Data sheet: PDF

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Software

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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