WM8860 w Multi-Channel High Definition Audio CODEC DESCRIPTION FEATURES Multi-channel High Definition Audio CODEC The WM8860 is a high performance multi-channel audio Fully compatible with Intel High Definition Audio Revision 1.0 CODEC designed for high performance portable PC audio 4-Channel DAC, 4-channel ADC systems. The device offers full compatibility with the Intel High DAC sampling frequency 8kHz - 192kHz Definition Audio (HDA) specification revision 1.0, allowing ADC sampling frequency 8kHz - 96kHz seamless integration with industry-standard HDA controllers. DAC Performance: The WM8860 has two high performance stereo DACs to enable - SNR 108dB (A weighted) four channels of high definition audio. A high-performance - SNR 105dB (non weighted) ground-referenced stereo headphone amplifier utilises advanced - THD -96dB (at 0dBFS) charge pump and DC servo technology to minimise system cost ADC Performance: and space without compromise on audio quality. A balanced - SNR 105dB (A weighted) line output, which can provide a differential connection to an - SNR 102dB (non weighted) external speaker amplifier, is also provided and enables - 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 WM8860 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 transmitter digitisation. A low noise microphone bias with programmable Jack detect and load impedance sensing output voltage is provided. Additionally, the CODEC contains a Beep generator digital microphone interface capable of supporting up to four GPIO functionality independent digital microphones. One differential stereo input is IEEE-754 Single precision 32-bit floating point support provided for line level signals, while one pseudo-differential Power supplies stereo input with integrated microphone preamplifier is provided. - Digital core: 1.62V 1.98V The WM8860 also contains a S/PDIF transmitter which is fully - Digital buffer: 2.97V 3.63V compatible with IEC-60958-3. Two dedicated GPIO pins are - Analogue: 4.5V 5.25V provided, enabling control of external amplifiers or other - Charge pump: 4.5V 5.25V additional system components. 48-pin 7mm x 7mm QFN package The WM8860 is supplied in a small 48-pin QFN package. APPLICATIONS High performance PC audio All-in-one desktop PC Notebook PC Pre-Production, June 2011, Rev 3.3 WOLFSON MICROELECTRONICS plc Copyright 2011 Wolfson Microelectronics plc WM8860 Pre-Production BLOCK DIAGRAM PP, April 2011, Rev 3.2 w 2