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LM4549B - Multi-Channel Audio Codec

Description

The LM4549B device is an audio codec for PC systems which is fully compliant with the PC99 and performs the analog intensive functions of the AC '97 Rev 2.1 architecture.

Using 18-bit sigma-delta ADCs and DACs, the LM4549B provides 90 dB of dynamic range.

Features

  • 1 Compliant With AC '97 Rev 2.1.
  • High-Quality Sample Rate Conversion from 4 kHz to 48 kHz in 1-Hz Increments.
  • Multiple Codec Support.
  • True Line Level Output with Separate Gain Control.
  • Texas Instrument's 3D Sound Stereo Enhancement Circuitry.
  • Advanced Power Management Support.
  • External Amplifier Power Down (EAPD) Control.
  • PC-Beep Passthrough to Line Out During Initialization or Cold Reset.
  • Digital 3.3-V and 5-V Supp.

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Full PDF Text Transcription

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM4549B SNAS598B – JULY 2012 – REVISED JULY 2015 LM4549B AC '97 Rev 2.1 Multi-Channel Audio Codec With Sample Rate Conversion and TI 3D Sound 1 Features •1 Compliant With AC '97 Rev 2.1 • High-Quality Sample Rate Conversion from 4 kHz to 48 kHz in 1-Hz Increments • Multiple Codec Support • True Line Level Output with Separate Gain Control • Texas Instrument's 3D Sound Stereo Enhancement Circuitry • Advanced Power Management Support • External Amplifier Power Down (EAPD) Control • PC-Beep Passthrough to Line Out During Initialization or Cold Reset • Digital 3.
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