WM2002: Stereo headphone driver with Wolfson ambient noise cancellation

Description

The WM2002 is a low power, high quality stereo headphone driver, delivering Wolfson's patented ambient noise cancellation. The WM2002 supports analogue playback or voice input, and analogue microphones for noise cancellation.

Designed for incorporation within a stand-alone headset or headphone, the Wolfson  ANC noise cancellation engine performs ambient noise cancellation during a voice call or during music playback.

The WM2002 provides integrated power management, comprising a DC-DC converter, Charge Pump and LDO Regulators. Different power supply configurations can be supported, including operation from a single cell AAA or AA battery, and other configurations using externally regulated supplies.

System clocking is achieved using a crystal-controlled on-chip oscillator. An external clock can be connected directly, if available.

The WM2002 is configured using programmable settings stored in an integrated non-volatile memory. The configuration stored in the OTP memory is enabled automatically at start-up. If required, the WM2002 can also be configured using register control accessed using a 2-wire serial control interface