WM8850 & WM8860 Multi-Channel High Definition Audio Hubs HIGH DEFINITION AUDIO WITH EXCEPTIONAL LEVELS OF PERFORMANCE AND FIDELITY FOR COMPUTERS. The WM8850 and WM8860 are high performance multi-channel audio CODECs designed for high performance PC audio systems. The devices offer full compatibility with the Intel High Definition Audio (HDA) specification revision 1.0, allowing seamless integration with industry-standard HDA controllers. PRODUCT BENEFITS TARGET APPLICATIONS Enables hi-fi quality audio performance for computers Reduces PCB footprint and BOM costs The WM8850 has three high performance stereo DACs to enable six channels of high definition audio, ideal for 5.1 channel applications. Line outputs provide a high-quality differential connection to speaker amplifiers. The WM8860 has two high performance stereo DACs. Low power optimisation increasing battery life DIGITAL FILTERS VOLUME CONTROL DMICDAC1 DIGITAL FILTERS DMICDAC2 DMICCLK DIGITAL MIC CLOCK MICBIAS MIC BIAS SPDIFIN S/PDIF RECEIVER VOLUME CONTROL SRC1 S/PDIF2 SRC2 DAC2 DAC3 S/PDIF TRANS1 JACK DETECT BCLK SYNC RESET SDI SDO WM8850 VIN2LP VIN2LN VOUT2RP VOUT2RN VOUT3LP VOUT3LN ADC1 ADC2 VIN2RP VIN2RN DIGITAL FILTERS DIGITAL FILTERS VOLUME CONTROL VOLUME CONTROL DIGITAL FILTERS DIGITAL FILTERS VOLUME CONTROL VOLUME CONTROL HPVSS HPVDD HPGND CFB2 CPCAP CFB1 VOUT1R DAC2 VOUT2LP VOUT2LN VOUT2RP VOUT2RN DMICDAC2 DMICCLK DIGITAL MIC CLOCK MICBIAS MIC BIAS S/PDIF TRANS1 GPIO1 GPIO CONTROL GPIO2 JACKDET2 VOUT1L DAC1 DMICDAC1 SPDIFOUT JACKDET1 CPVDD AGND VREFN VMID VREFP AVDD DBVDD DCVDD DGND VOUT2LP VOUT2LN VOUT3RP VOUT3RN GPIO CONTROL HDA INTERFACE HPVSS HPVDD HPGND CFB2 CFB1 CPCAP CPVDD AGND VREFN VMID VREFP DIGITAL FILTERS VOLUME CONTROL VOUT1R VIN1RP VIN1RN WM8860 JACK DETECT HDA INTERFACE BCLK VIN2RP VIN2RN VOLUME CONTROL VIN1LP VIN1N SYNC ADC2 VOLUME CONTROL VOUT1L DAC1 RESET VIN2LP VIN2LN DIGITAL FILTERS Notebook PC SDI VIN1RP VIN1RN DIGITAL FILTERS All-in-one desktop PC SDO ADC1 AVDD DBVDD DCVDD DGND VIN1LP VIN1N Hi-fi quality SRC for glitch free S/PDIF transceiver operation High performance PC audio The devices also have 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 pseudodifferential stereo input with integrated microphone pre-amplifier is provided. SPDIFOUT GPIO1 GPIO2 JACKDET1 JACKDET2 WM8850 & WM8860 Multi-Channel High Definition Audio Hubs HIGH PERFORMANCE AUDIO QUALITY PRODUCT FEATURES Multi-channel digital microphone interface Differential line inputs/outputs WM8850 - 6-channel DAC, 4-channel ADC WM8860 - 4-channel DAC, 4-channel ADC IEC-60958-3 compatible S/PDIF transceiver (WM8850 only) REDUCED SYSTEM COST DAC sampling frequency 8kHz - 192kHz ADC sampling frequency 8kHz - 96kHz DAC Performance: - SNR 108 dB (‘A’ weighted) - THD -95dB (at -1dBFS) ADC Performance: - SNR 105 dB (‘A’ weighted) - THD -92dB (at -1dBFS) Ground-referenced stereo headphone driver Stereo microphone interface with integrated pre-amp Additional IEC-60958-3 compatible S/PDIF transmitter Jack detect and mic impedance sensing IEEE-754 Single precision 32-bit floating point support PCB space and BOM costs are kept to a minimum due to a ground referenced headphone amplifier that utilizes advanced charge pump and DC servo technology to effectively eliminate pops and clicks without compromising audio quality. LOWER POWER CONSUMPTION Power supplies - Digital core: 1.62V – 1.98V - Digital buffer: 2.97V – 3.63V - Analogue: 4.5V – 5.5V - Charge pump: 4.5V – 5.5V The devices offer lower power consumption to help improve the length of time a computer can operate on battery power. This is achieved whilst still maintaining improved SNR and THD performance for high quality audio. 48-pin 7mm x 7mm QFN package HI-FI QUALITY SRC FOR GLITCH FREE S/PDIF TRANSCEIVER OPERATION The WM8850 incorporates two hi-fi quality sample rate converters (SRC) which enables glitch-free operation of the S/PDIF transmitter and receiver. This enables asynchronous sample rate conversion between the S/PDIF interface and HDA interface clock domains, without dropping or repeated samples. www.wolfsonmicro.com CONTACT DETAILS For more information please visit www.wolfsonmicro.com or sign up for Wolfson eNews at: www.wolfsonmicro.com/enews WORLD HEADQUARTERS USA SALES OFFICE JAPAN SALES OFFICE Wolfson Microelectronics plc Wolfson Microelectronics, Inc. Wolfson Microelectronics plc ASIA PACIFIC SALES OFFICE Wolfson Microelectronics plc Westfield House 26 Westfield Road Edinburgh EH11 2QB United Kingdom 10001 N. De Anza Boulevard Suite 301 Cupertino CA 95014 USA 23F Sky Building 2-19-12 Takashima Nishi-ku Yokohama, 220-0011 Japan 2F, No.39, Alley 20 Lane 407, Sec. 2 Tiding Boulevard, NeiHu District Taipei 114 Taiwan t: +44 (0)131 272 7000 f: +44 (0)131 272 7001 e: [email protected] t: +1 (408) 329 9800 e: [email protected] t: +81 (0) 45 440 1230 f: +81 (0) 45 440 1231 e: [email protected] t: +886 (0) 2 875 11600 f: +886 (0) 2 875 10201 e: [email protected] © COPYRIGHT 2011, WOLFSON MICROELECTRONICS PLC. and the wave logo are a registered trademark of Wolfson Microelectronics plc. All other trademarked names, whether indicated as such or not, are the property of their respective owners. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Wolfson Microelectronics plc assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information contained in the document. PO-FL-8850/60-01/11 Fully compatible with Intel High Definition Audio specification revision 1.0 The devices bring hi-fi quality audio to the computer market by using next generation high performance ADCs offering 105dB SNR and DACs offering 108dB SNR. A powerful integrated ground referenced headphone driver delivers performance usually reserved for descrete devices.