The WM8983 is a low power, high quality stereo codec designed for portable multimedia applications. Highly flexible analog mixing functions enable new application features, combining hi-fi quality audio with voice communication.
The device integrates preamps for stereo differential mics, and includes drivers for speaker, headphone and differential or stereo line output. External component requirements are reduced as no separate microphone or headphone amplifiers are required.
Advanced on-chip digital signal processing includes a five-band equaliser, a mixed signal Automatic Level Control for the microphone or line input through the ADC as well as a purely digital limiter function for record or playback. A programmable high pass filter in the ADC path is provided for wind noise reduction and an IIR with programmable coefficients can be used as a notch filter to suppress fixed-frequency noise.
The WM8983 digital audio interface can operate in master or slave mode, while an integrated PLL supports flexible clocking schemes. A-law and m-law companding are fully supported.
The WM8983 operates at analog supply voltages from 2.5V to 3.3V, although the digital core can operate at voltages down to 1.71V to save power. Speaker supplies can operate up to 5V for increased speaker output power. Additional power management control enables individual sections of the chip to be powered down under software control.
