WM8850GEFLV Cirrus Logic

WM8850 w Multi-Channel High Definition Audio CODEC DESCRIPTION FEATURES Multi-channel High Definition Audio CODEC The WM8850 is a high performance multi-channel audio Fully compatible with Intel High Definition Audio Revision 1.0 CODEC designed for high performance PC audio systems. The 6-Channel DAC, 4-channel ADC device offers full compatibility with the Intel High Definition Audio DAC sampling frequency 8kHz - 192kHz (HDA) specification revision 1.0, allowing seamless integration ADC sampling frequency 8kHz - 96kHz with industry-standard HDA controllers. DAC Performance: The WM8850 has three high performance stereo DACs to - SNR 108 dB (A weighted) enable six channels of high definition audio, ideal for 5.1 - SNR 105dB (non weighted) channel applications. A high-performance ground-referenced - THD -96dB (at 0dBFS) stereo headphone amplifier utilises advanced charge pump and ADC Performance: DC servo technology to minimise system cost and space without - SNR 105 dB (A weighted) compromise on audio quality. Line outputs provide a high- - SNR 102dB (non weighted) quality differential connection to speaker amplifiers, enabling - THD -95dB (at -1dBFS) common mode noise rejection when these traces are routed Ground-referenced stereo headphone driver across a PCB. Differential line inputs/outputs Stereo microphone interface with integrated pre-amp The WM8850 also has two high performance stereo ADCs to Multi-channel digital microphone interface provide Hi-Fi quality analogue line-in and microphone input IEC-60958-3 compatible S/PDIF transceiver digitisation. A low noise microphone bias with programmable Additional IEC-60958-3 compatible S/PDIF transmitter output voltage is provided. Additionally, the CODEC contains a Jack detect and load impedance sensing digital microphone interface capable of supporting up to four Beep generator independent digital microphones. One differential stereo input is GPIO functionality provided for line level signals, while one pseudo-differential IEEE-754 Single precision 32-bit floating point support stereo input with integrated microphone preamplifier is provided. Power supplies The WM8850 also contains a S/PDIF transceiver which is fully - Digital core: 1.62V 1.98V compatible with IEC-60958-3. The S/PDIF receive and transmit - Digital buffer: 2.97V 3.63V paths each contain a sample rate converter (SRC) to enable - Analogue: 4.5V 5.25V asynchronous sample rate conversion between the S/PDIF - Charge pump: 4.5V 5.25V receive/transmit and HDA interface clock domains. An 48-pin 7mm x 7mm QFN package additional S/PDIF transmitter is provided to allow direct output of APPLICATIONS a stereo stream from the HDA interface. The WM8850 is supplied in a small 48-pin QFN package. High performance PC audio All-in-one desktop PC Notebook PC Pre Production, April 2011, Rev 3.2 WOLFSON MICROELECTRONICS plc Copyright 2011 Wolfson Microelectronics plc WM8850 Pre-Production BLOCK DIAGRAM PP, April 2011, Rev 3.2 w 2