The CS4216 Stereo Audio Codec is a monolithic CMOS device for computer multimedia, automotive, and portable audio applications. It performs A/D and D/A conversion, filtering, and level setting, creating 4 audio inputs and 2 audio outputs for a digital computer system. The digital interfaces of left and right channels are multiplexed into a single serial data bus with word rates up to 50 kHz per channel. Up to 4 CS4216 devices can be attached to a single hardware bus. Both the ADCs and the DACs use delta-sigma modulation with 64X oversampling. The ADCs include a digital decimation filter which eliminates the need for external anti-aliasing filters. The DACs include output smoothing filters on-chip.