Audio Codec 1ADC / 1DAC 36-Pin uSMD T/R

The LM49350 is a high performance audio subsystem that supports both analog and digital audio functions. The LM49350 includesa high quality stereo DAC, a high quality stereo ADC, a stereo headphone amplifier that supports ground referenced outputcap-less operation, a dual mode earpiece speaker amplifier, and a low EMI Class D loudspeaker amplifier. It is designed fordemanding applications in mobile phones and other portable devices. The LM49350 features dual bi-directional I2S or PCM audio interfaces for full range audio and an I2C compatible interface for control. The stereo DAC path features an SNR of 96dB with 24-bit 48 kHz input. The headphone amplifierdelivers 69mWRMS (typ) to a 32? single-ended stereo load with less than 1% distortion (THD+N) when A_VDD = 3.3V. The earpiece speaker amplifier delivers 58mWRMS (typ) to a 32? bridged-tied load with less than 1% distortion (THD+N) when A_VDD = 3.3V. The loudspeaker amplifier delivers up to 495mW into an 8? load with less than 1% distortion when LS_VDD = 3.3V and up to 1.2W.

High performance 96dB SNR stereo DAC

High performance 94dB SNR stereo ADC

Up to 192kHz stereo audio playback

Up to 48kHz stereo recording

Dual bidirectional I 2S or PCM compatible audio interfaces

Read/write I 2C compatible control interface

Flexible digital mixer with sample rate conversion

Dual sigma-delta PLLs for operation from any clock at any sample rate

Digital 3D stereo enhancement

Dual 5 band parametric equalizers

Cascadable DSP effects that allow 10 band parametric equalization

ALC/Compressor/Limiter on both DAC and ADC paths

Ultra low EMI, Class D loudspeaker amplifier with spread spectrum control

Ground referenced output cap-less headphone amplifier operation

Earpiece speaker amplifier with reduced power consumption mode for mono differential line out applications

Stereo auxiliary inputs or mono differential input

Differential stereo microphone inputs with single-ended option

Automatic level control for digital audio inputs, stereo microphone inputs, and stereo auxiliary inputs

Flexible audio routing from input to output

16 Step volume control for microphones with 2dB steps

32 Step volume control for auxiliary inputs in 1.5dB steps

Micro-power shutdown mode

Available in the 3.5 x 3.5 mm 36 bump micro SMD package