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
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