Wolfson Microelectronics has introduced an audio chip for MP3 music and video playback in smartphones that delivers100dB signal-to-noise ratio (SNR) during DAC playback.

The WM1811 has a 2W stereo Class D speaker driver and Class W headphone driver.

Design options are increased because of the chip’s stereo full-duplex asynchronous sample rate conversion and multi-channel digital mixing. There is also an analogue mixer.

An integrated Wolfson ReTune programmable parametric equaliser design designed to provide speaker compensation in the digital playback paths.

The chip’s dynamic range controller can be used in record or playback paths for maintaining a constant signal level, maximising loudness and protecting speakers against overloading and clipping.

“Designing with the WM1811 allows consumer electronics manufacturers to use audio performance and battery life to differentiate their end product in the marketplace,” said Duncan Macadie, product line manager for audio hubs at Wolfson Microelectronics.

The WM1811 is available for sampling now in an 80-ball W-CSP package.

http://www.wolfsonmicro.com

Article source: http://www.electronicsweekly.com/Articles/2012/02/03/52879/wolfson-intros-low-noise-mp3-audio-chip-for-smartphones.htm