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LM4937 - Audio Sub-System

General Description

The LM4937 is an integrated audio sub-system designed for mono voice, stereo music cell phones connecting to base band processors with mono differential analog voice paths.

Key Features

  • an I2S serial interface for full range audio and an I2C or SPI compatible interface for control. The full range music path features an SNR of 85dB with an 18-bit 48kHz input. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. Key Specifications.
  •  POUT, BTL, 8Ω, 3.3V, 1%.
  •  POUT H/P, 32Ω, 3.3V, 1%.
  •  POUT Mono Earpiece, 32Ω, 1%.
  •  Shutdown current.
  •  SNR (DAC + Amplifier) 520mW (typ) 36mW (typ.

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Full PDF Text Transcription for LM4937 (Reference)

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www.DataSheet4U.com LM4937 Audio Sub-System with OCL Stereo Headphone Output and RF Suppression February 2007 LM4937 Audio Sub-System with OCL Stereo Headphone Output and...

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uary 2007 LM4937 Audio Sub-System with OCL Stereo Headphone Output and RF Suppression General Description The LM4937 is an integrated audio sub-system designed for mono voice, stereo music cell phones connecting to base band processors with mono differential analog voice paths. Operating on a 3.3V supply, it combines a mono speaker amplifier delivering 520mW into an 8Ω load, a stereo headphone amplifier delivering 36mW per channel into a 32Ω load, and a mono earpiece amplifier delivering 55mW into a 32Ω load. It integrates the audio amplifiers, volume control, mixer, and power management control all into a single package.

More Datasheets from National Semiconductor (now Texas Instruments)

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