LM4930

The LM4930 is an integrated audio subsystem that supports voice and digital audio functions.The LM4930 includes a high quality I²S input stereo DAC,a voice band codec, a stereo headphone amplifier and a high-power mono speaker amplifier.It is primarily designed for demanding applications in mobile phones and other portable devices.

The LM4930 features an I²S serial interface for full range audio,a 16-bit PCM bi-directional serial interface for the voice band codec and an two-wire interface for control. The full range music path features an SNR of 86dB with a 16-bit 48kHz input.The stereo DAC can also be used while the voice codec is in use.The headphone amplifier delivers 25mW_RMS to a 32Ω single-ended stereo load with less than 0.5% distortion (THD+N) when AV_DD=3V.The mono speaker amplifier delivers up to 300mW into an 8Ω load with less than 2% distortion when AV_DD =3V.

The LM4930 employs advanced techniques to reduce power consumption,to reduce controller overhead and to eliminate click and pop.Boomer audio power amplifiers were de-signed specifically to provide high quality output power with a minimal amount of external components.It is,therefore,ideally suited for mobile phone and other low voltage appli-cations where minimal power consumption is a primary re-quirement.