The CS43L22 is a highly integrated, low-power stereo digital/analog converter (DAC) with headphone and Class D speaker amplifiers. The DAC output path includes a digital signal processing engine with various fixed-function controls, such as tone and volume control. The DAC also includes de-emphasis, limiting functions and beep generator that delivers tones selectable across a range of two octaves.

The stereo headphone amplifier is powered from a separate positive supply and the integrated charge pump provides a negative supply, allowing for a ground-centered analog output that eliminates the need for DC blocking capacitors. The Class D stereo speaker, which does not require an external filter, may be powered directly from a battery.

The CS43L22 accommodates analog routing of the input signal directly to the headphone amplifier — a useful feature for applications that utilize an FM tuner. The CS43L22 operates from a low-voltage analog and digital core, making it ideal for portable systems that require extremely low power consumption in a minimal amount of space.