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WM8850 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8850 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 223 page  w WM8850 Multi-Channel High Definition Audio CODEC WOLFSON MICROELECTRONICS plc Pre Production, April 2011, Rev 3.2 Copyright 2011 Wolfson Microelectronics plc DESCRIPTION The WM8850 is a high performance multi-channel audio CODEC designed for high performance PC audio systems. The device offers full compatibility with the Intel High Definition Audio (HDA) specification revision 1.0, allowing seamless integration with industry-standard HDA controllers. The WM8850 has three high performance stereo DACs to enable six channels of high definition audio, ideal for 5.1 channel applications. A high-performance ground-referenced stereo headphone amplifier utilises advanced charge pump and DC servo technology to minimise system cost and space without compromise on audio quality. Line outputs provide a high- quality differential connection to speaker amplifiers, enabling common mode noise rejection when these traces are routed across a PCB. The WM8850 also has two high performance stereo ADCs to provide Hi-Fi quality analogue line-in and microphone input digitisation. A low noise microphone bias with programmable output voltage is provided. Additionally, the CODEC contains a digital microphone interface capable of supporting up to four independent digital microphones. One differential stereo input is provided for line level signals, while one pseudo-differential stereo input with integrated microphone preamplifier is provided. The WM8850 also contains a S/PDIF transceiver which is fully compatible with IEC-60958-3. The S/PDIF receive and transmit paths each contain a sample rate converter (SRC) to enable asynchronous sample rate conversion between the S/PDIF receive/transmit and HDA interface clock domains. An additional S/PDIF transmitter is provided to allow direct output of a stereo stream from the HDA interface. The WM8850 is supplied in a small 48-pin QFN package. FEATURES Multi-channel High Definition Audio CODEC Fully compatible with Intel High Definition Audio Revision 1.0 6-Channel DAC, 4-channel ADC DAC sampling frequency 8kHz - 192kHz ADC sampling frequency 8kHz - 96kHz DAC Performance: - SNR 108 dB (‘A’ weighted) - SNR 105dB (non weighted) - THD -96dB (at 0dBFS) ADC Performance: - SNR 105 dB (‘A’ weighted) - SNR 102dB (non weighted) - THD -95dB (at -1dBFS) Ground-referenced stereo headphone driver Differential line inputs/outputs Stereo microphone interface with integrated pre-amp Multi-channel digital microphone interface IEC-60958-3 compatible S/PDIF transceiver Additional IEC-60958-3 compatible S/PDIF transmitter Jack detect and load impedance sensing Beep generator GPIO functionality IEEE-754 Single precision 32-bit floating point support Power supplies - Digital core: 1.62V – 1.98V - Digital buffer: 2.97V – 3.63V - Analogue: 4.5V – 5.25V - Charge pump: 4.5V – 5.25V 48-pin 7mm x 7mm QFN package APPLICATIONS High performance PC audio All-in-one desktop PC Notebook PC |
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