WM8766 w 24-bit, 192kHz 6-Channel DAC DESCRIPTION FEATURES 6-Channel DAC The WM8766 is a multi-channel audio DAC ideal for DVD and surround sound processing applications for home hi-fi, Audio Performance automotive and other audio visual equipment. 103dB SNR (A weighted 48kHz) DAC DAC Sampling Frequency: 8kHz 192kHz Three stereo 24-bit multi-bit sigma delta DACs are used with oversampling digital interpolation filters. Digital audio 3-Wire SPI Serial or Hardware Control Interface input word lengths from 16-32 bits and sampling rates from Programmable Audio Data Interface Modes 8kHz to 192kHz are supported. Each DAC channel has 2 I S, Left, Right Justified or DSP independent digital volume and mute control. 16/20/24/32 bit Word Lengths 2 The audio data interface supports I S, left justified, right Three Independent stereo DAC outputs with independent justified and DSP digital audio formats digital volume controls Master or Slave Audio Data Interface The device is controlled via a 3 wire serial interface or directly using the hardware interface. These interfaces 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply provide access to features including channel selection, Operation volume controls, mutes, de-emphasis and power 28 lead SSOP Package management facilities. The device is available in a 28-lead SSOP. APPLICATIONS DVD Players Surround Sound AV Processors and Hi-Fi systems Automotive Audio BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc Production Data, July 2005, 4.1 To receive regular email updates, sign up at WM8766 Production Data TABLE OF CONTENTS DESCRIPTION .......................................................................................................1 FEATURES.............................................................................................................1 APPLICATIONS .....................................................................................................1 BLOCK DIAGRAM .................................................................................................1 TABLE OF CONTENTS .........................................................................................2 PIN CONFIGURATION 28 LEAD SSOP ...............................................................3 ORDERING INFORMATION ..................................................................................3 PIN DESCRIPTION 28 LEAD SSOP...................................................................4 ABSOLUTE MAXIMUM RATINGS.........................................................................5 RECOMMENDED OPERATING CONDITIONS .....................................................6 ELECTRICAL CHARACTERISTICS ......................................................................6 TERMINOLOGY............................................................................................................ 7 MASTER CLOCK TIMING............................................................................................. 7 DIGITAL AUDIO INTERFACE MASTER MODE......................................................... 8 DIGITAL AUDIO INTERFACE SLAVE MODE ............................................................ 9 MPU INTERFACE TIMING.......................................................................................... 10 INTERNAL POWER ON RESET CIRCUIT ..........................................................11 DEVICE DESCRIPTION.......................................................................................12 INTRODUCTION......................................................................................................... 12 AUDIO DATA SAMPLING RATES............................................................................... 12 HARDWARE CONTROL MODES ............................................................................... 13 DIGITAL AUDIO INTERFACE ..................................................................................... 15 POWERDOWN MODES ............................................................................................. 18 SOFTWARE CONTROL INTERFACE OPERATION................................................... 19 CONTROL INTERFACE REGISTERS ........................................................................ 19 REGISTER MAP...................................................................................................30 DIGITAL FILTER CHARACTERISTICS ...............................................................31 DAC FILTER RESPONSES .................................................................................31 DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 32 APPLICATIONS INFORMATION .........................................................................33 RECOMMENDED EXTERNAL COMPONENTS.......................................................... 33 SUGGESTED ANALOGUE LOW PASS POST DAC FILTERS ................................... 34 PACKAGE DIMENSIONS ....................................................................................35 IMPORTANT NOTICE ..........................................................................................36 ADDRESS: .................................................................................................................. 36 PD Rev 4.1 July 2005 w 2