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LM4931 - Audio Subsystem

General Description

The LM4931 is an integrated audio subsystem that supports voice and digital audio functions.

The LM4931 includes a high quality stereo DAC, voice band codec, a stereo headphone amplifier and a high-power high efficiency mono speaker amplifier.

Key Features

  • 1.
  • 23 18-bit 44.1kHz or 48kHz Stereo DAC.
  • 16-bit 8kHz , 12kHz , 16kHz, or 24kHz Voice- Band Codec.
  • PLL for Operation from Common System Clocks.
  • Either I2C or SPI Compatible Serial Interface.
  • I2S Digital Audio Data Serial Interface.
  • PCM Voice Audio Data Serial Interface.
  • Differential Analog Microphone Input.
  • 26mW/Channel Stereo Headphone Amplifier.
  • 570mW Mono High Efficiency BTL 8Ω Amplifier.
  • 32-step Volume C.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM4931 www.ti.com SNAS251E – APRIL 2004 – REVISED MAY 2013 LM4931 Boomer™ Audio Power Amplifier Series Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers Check for Samples: LM4931 FEATURES 1 •23 18-bit 44.1kHz or 48kHz Stereo DAC • 16-bit 8kHz , 12kHz , 16kHz, or 24kHz Voice- Band Codec • PLL for Operation from Common System Clocks • Either I2C or SPI Compatible Serial Interface • I2S Digital Audio Data Serial Interface • PCM Voice Audio Data Serial Interface • Differential Analog Microphone Input • 26mW/Channel Stereo Headphone Amplifier • 570mW Mono High Efficiency BTL 8Ω Amplifier • 32-step Volume Control for Audio Output Amplifiers with 1.5dB Step Size.