WM8281

WM8281 Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation DESCRIPTION The WM8281 is a highly-integrated low-power audio system for smartphones, tablets and other portable audio devices. It combines an advanced DSP feature set with a flexible, highperformance audio hub CODEC. The WM8281 digital core combines a quad-core, 600MMAC DSP system with a variety of power-efficient fixed-function audio processing blocks. The programmable DSP cores support advanced audio features, including multi-mic wideband noise reduction, high-performance acoustic echo cancellation (AEC), mono ambient noise cancellation (ANC), speech enhancement, advanced media enhancement, and many more. The DSP cores are supported by a fully-flexible, all-digital mixing and routing engine with sample rate converters, for wide use-case flexibility. A SLIMbus® interface supports multi-channel audio paths and host control register access. Multiple sample rates are supported concurrently via the SLIMbus interface. Three further digital audio interfaces are provided, each supporting a wide range of standard audio sample rates and serial interface formats. Automatic sample rate detection enables seamless wideband/narrowband voice call handover. Three stereo headphone drivers each provide stereo groundreferenced or mono BTL outputs. 110dB SNR, and noise levels as low as 0.8μVRMS, offer hi-fi quality line or headphone output. The WM8281 also features a stereo pair of 2W Class-D outputs and four...