WM8281 Datasheet | Cirrus Logic

DESCRIPTION The WM8281 is a highly-integrated low-power audio system for smartphones, tablets and other portable audio devices. It bines an advanced DSP feature set with a flexible, highperformance audio hub CODEC. The WM8281 digital core bines 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. 110d B 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 channels of stereo PDM output. A signal generator for controlling haptics devices is included; vibe actuators can connect directly to the Class-D speaker output, or via an external driver on the PDM output interface. All inputs, outputs and system interfaces can function concurrently. The WM8281 supports up to eight microphone inputs, (up to six analogue, or up to eight PDM digital, or binations of each). Microphone activity detection with interrupt is available. A smart accessory interface supports most standard 3.5mm accessories. Impedance sensing and measurement is provided for...