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LM49321 Datasheet Audio Sub-system

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM49321 Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression www.DataSheet4U.

General Description

The LM49321 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.

The headphone amplifier can be configured for output capacitor-less (OCL) or single-ended (SE) mode.

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 up to 192kHz playback. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. Key Specifications.
  •  POUT LS, 8Ω, 3.3V, 1% THD+N.
  •  POUT HP, 32Ω, 3.3V, 1% THD+N.
  •  POUT Mono Earpiece, 32Ω 1% THD+N 55mW (typ) 0.6µA (typ) 85dB (typ) 520mW (typ) 36mW (typ).

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number Description
LM4930 Audio Subsystem
LM4931 Audio Subsystem
LM4934 3D Audio Sub-System
LM4935 Audio Sub-System
LM49350 High Performance Audio Codec Sub-System
LM4936 Stereo 2W Audio Power Amplifiers
LM4937 Audio Sub-System
LM49370 Audio Sub-System
LM4938 Stereo 2W Audio Power Amplifiers
LM4900 265mW at 3.3V Supply Audio Power Amplifier

LM49321 Distributor