General Description
The CS4218 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.

Complete CMOS Stereo Audio Input and Output System featuring:
• Delta-Sigma A/D and D/A Converters using 64x Oversampling.
• Input Anti-Aliasing and Output Smoothing Filters.
• Programmable Input Gain (0 dB to 22.5 dB).
• Programmable Output Attenuation (0 dB to 46.5 dB).
• Sample frequencies from 4 kHz to 50 kHz.
• Low Distortion, THD < 0.02% for DAC. THD < 0.02% for ADC.
• Low Power Dissipation: 80 mA typical.
• Power-Down Mode : 1 mA typical.
• Pin Compatible with CS4216 when used in Serial Modes 3 and 4 (See Appendix A).
• I2S(TM) Compatible Serial Mode (SM5).
• Operates from 5V or 3.3V Digital Power Supply. Requires 5V Analog Power Supply.