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Active Volume Control for Professional Audio
TIPD136
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Description & Features

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Key Document

Description

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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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA1604  Quad, SoundPlus High-Performance, Bipolar-Input Audio Op Amp  Operational amplifiers (op amps)  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA1604 Download Download
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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 879 08 Jan 2014
Design files (4)
Title Type Size (KB) Date
ZIP 1977 09 Jan 2014
PDF 145 09 Jan 2014
PDF 85 09 Jan 2014
ZIP 2424 08 Jan 2014
Related Tools & Software

Software development (2)



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