WM8786GEDS/V

WM8786 24-bit, 192kHz Stereo ADC DESCRIPTION FEATURES SNR 111dB (A weighted 48kHz) The WM8786 is a stereo audio ADC with differential inputs THD -102dB (at -0.1dB) designed for high performance recordable media Sampling Frequency: 8 192kHz applications. Data is provided as a PCM output. Hardware Control Interface Stereo 24-bit multi-bit sigma-delta ADCs are used with Master or Slave Clocking Mode digital audio output word lengths of 16 to 32 bits, and Programmable Audio Data Interface Modes 2 sampling rates from 8kHz to 192kHz. The device also has a - I S, Left, Right Justified or DSP high pass filter to remove residual DC offsets. - 24-Bit Word Length Supply Voltages The device is hardware controlled. Pin programming - Analogue 4.5 to 5.5V provides access to all features including oversampling rate, - Digital core: 2.7V to 3.6V audio format, powerdown, master/slave control and digital 20-lead SSOP package signal manipulation. The device is supplied in a 20-lead SSOP package. APPLICATIONS Recordable DVD Players Personal Video Recorders High End Sound Cards Studio Audio Processing Equipment BLOCK DIAGRAM DGND DVDD AINR+ DIGITAL ADC FILTER AINR- LRCLK BCLK WM8786 DOUT AINL+ DIGITAL ADC FILTER CLOCK AINL- MCLK CIRCUITRY CONTROL INTERFACE 50k 50k Rev 4.4 Copyright Cirrus Logic, Inc., 20042015 FEB 15 WM8786 TABLE OF CONTENTS DESCRIPTION ................................................................................................................ 1 FEATURES ..................................................................................................................... 1 APPLICATIONS .............................................................................................................. 1 BLOCK DIAGRAM .......................................................................................................... 1 TABLE OF CONTENTS .................................................................................................. 2 PIN CONFIGURATION ................................................................................................... 3 ORDERING INFORMATION ........................................................................................... 3 PIN DESCRIPTION ......................................................................................................... 4 ABSOLUTE MAXIMUM RATINGS ................................................................................. 5 RECOMMENDED OPERATING CONDITIONS .............................................................. 5 ELECTRICAL CHARACTERISTICS ............................................................................... 6 TERMINOLOGY ..................................................................................................................... 7 SIGNAL TIMING REQUIREMENTS ............................................................................... 8 SYSTEM CLOCK TIMING ...................................................................................................... 8 AUDIO INTERFACE TIMING MASTER MODE, PCM DATA ............................................... 8 AUDIO INTERFACE TIMING SLAVE MODE, PCM DATA ................................................... 9 POWER-ON RESET .............................................................................................................10 DIGITAL FILTER CHARACTERISTICS........................................................................ 11 TERMINOLOGY ....................................................................................................................11 HIGH PASS FILTER TRANSFER CHARACTERISTIC ..........................................................11 FILTER RESPONSES .................................................................................................. 12 SINGLE RATE 48K ................................................................................................................12 DUAL RATE 96K ...................................................................................................................13 QUAD RATE 192K ................................................................................................................15 HIGH PASS FILTER ..............................................................................................................16 DEVICE DESCRIPTION ............................................................................................... 18 INTRODUCTION ...................................................................................................................18 DIGITAL AUDIO INTERFACE ...............................................................................................18 MASTER AND SLAVE MODE OPERATION ............................................................................................................................ 18 AUDIO DATA FORMATS ......................................................................................................................................................... 19 AUDIO INTERFACE CONTROL ............................................................................................................................................... 21 OVERSAMPLING RATIOS AND SIGMA-DELTA MODULATOR FREQUENCY ....................21 MASTER CLOCK AND AUDIO SAMPLE RATES ..................................................................22 MLCK AND LRCLK PHASE RELATIONSHIP ........................................................................22 APPLICATIONS INFORMATION .................................................................................. 23 RECOMMENDED EXTERNAL COMPONENTS ....................................................................23 RECOMMENDED PCB LAYOUT ...........................................................................................24 PACKAGE DIMENSIONS ............................................................................................. 25 IMPORTANT NOTICE .................................................................................................. 26 REVISION HISTORY .................................................................................................... 27 2 Rev 4.4