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LM49352

National Semiconductor Corporation
Part Number LM49352
Manufacturer National Semiconductor Corporation
Description Mono Class D Audio Codec Subsytem
Published Jun 5, 2009
Detailed Description LM49352 PRODUCT BRIEF LM49352 PRODUCT BRIEF www.datasheet4u.com PRELIMINARY March 24, 2009 Mono Class D Audio Codec S...
Datasheet PDF File LM49352 PDF File

LM49352
LM49352

Overview
LM49352 PRODUCT BRIEF LM49352 PRODUCT BRIEF www.
datasheet4u.
com PRELIMINARY March 24, 2009 Mono Class D Audio Codec Subsystem with Ground Referenced Headphone Amplifiers, Earpiece Driver, and Audio DSP 1.
0 General Description The LM49352 is a high performance mixed signal audio subsystem.
The LM49352 includes a high quality stereo DAC, a high quality stereo ADC, a stereo headphone amplifier, which supports True Ground operation, a low EMI Class D loudspeaker amplifier, and an earpiece speaker amplifier.
It combines advanced audio processing, conversion, mixing, and amplification in the smallest possible footprint while extending the battery life of feature rich portable devices.
The LM49352 features dual bi-directional I2S or PCM audio interfaces and an I2C compatible interface for control.
The stereo DAC path features an SNR of 103dB with 24-bit 48 kHz input.
The headphone amplifier delivers 65mWRMS (typ) to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when HP_VDD = 2.
8V.
The loudspeaker amplifier delivers up to 970mW into an 8Ω load with less than 1% distortion when LS_VDD = 4.
2V.
The LM49352 employs advanced techniques to extend battery life, to reduce controller overhead, to speed development time, and to eliminate click and pop artifacts.
Boomer audio power amplifiers are designed specifically for mobile devices and require minimal PCB area and external components.
Notice: This document is not a full datasheet.
For more information regarding this product or to order samples please contact your local National Semiconductor sales office or visit http://www.
national.
com/support/dir.
html ■ ■ ■ ■ PLS at LS_VDD = 4.
2V, 8Ω, 1% THD 970mW (typ) PLS at LS_VDD = 3.
3V, 8Ω, 1% THD 590mW (typ) SNR (Stereo DAC at 48kHz) 103dB (typ) PSRR at 217 Hz, A_VDD = 3.
3V, (HP from 90dB (typ) AUX) 4.
0 Features ■ Ultra efficient, spread spectrum Class D loudspeaker ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ amplifier that operates at 93% efficiency Low volt...


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