AV2722

AVS Technology FEATURES Complete DAC and ADC Audio CODEC with headphone driver. Up to 96kHz input sampling frequencies for ADC/DAC Selectable DAC De-emphasis Filter. Selectable ADC High Pass Filter Programmable Audio Data Interface I2S, Normal, Left justified or DSP data for ADC/DAC 16,18, 20 and 24-bit input data resolution System clock: 64fs, 96fs,128fs, 192fs, 256fs or 384fs 250fs and 272fs system clock for USB application Master or Slave Clocking mode Regular audio or USB mode audio 2 or 3-wire software control interface selectable by external pin. 2 channel microphone or line inputs Programmable power down features to conserve power AV2722 AUDIO CODEC WITH HEADPHONE DRIVER AND PROGRAMMABLE SAMPLE RATES DESCRIPTION The AV2722 is a mixed signal CMOS monolithic device which is a low cost audio CODEC designed with a built-in headphone driver. It supports regular audio or USB mode audio and is therefore ideal for portable MP3 audio and speech players and recorders. It can also be used for minidisk, CD-RW machines. Stereo line audio inputs with programmable gain are provided A microphone bias voltage output is also provided which makes the AV2722 ideal for an electret type microphone. For the multi-bit signal delta DAC, 64X oversampling digital interpolation filter is used with programmable de-emphasis, volume control, and sampling rate selection features. The DAC supports I2S, Normal, Left justified or DSP data with 16, 18, 20 and 24-bit resoluti...