WM9090: Ultra low power audio subsystem

描述

The WM9090 is a high performance low power audio subsystem with integrated headphone driver and Class D speaker driver. The speaker driver supports 750mW output power at 3.7V, 1%THD.

The unique dual mode charge pump architecture provides ground referenced headphone outputs, removing the requirement for external coupling capacitors. Class G technology is integrated to increase the efficiency and extend playback time by optimizing the headphone driver supply voltages according to the volume control.

The flexible input configuration allows single ended or differential stereo inputs. Mixers allow highly flexible routing to the outputs.

Separate mixer and volume controls are provided for each headphone and speaker driver. Automatic Gain Control limits the speaker output signal in order to prevent clipping. DC offset correction to less than 1mV guarantees a pop/click-free headphone start up.

WM9090 is controlled using a two-wire I²C interface. An integrated oscillator generates all internal clocks, removing the need to provide any external clock.

WM9090 is available in a 2.53mm x 2.07mm 20-bump CSP package.