WM8785 Datasheet, PDF (2/31 Pages) Wolfson Microelectronics plc – 24-Bit, 192kHz Stereo ADC

WM8785
TABLE OF CONTENTS
Pre-Production
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
CONTROL INTERFACE TIMING – 3-WIRE MODE ...................................................... 9
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 10
POWER-ON RESET ................................................................................................... 11
DIGITAL FILTER CHARACTERISTICS ...............................................................12
TERMINOLOGY .......................................................................................................... 12
FILTER RESPONSES ..........................................................................................13
DEVICE DESCRIPTION.......................................................................................16
INTRODUCTION ......................................................................................................... 16
DIGITAL AUDIO INTERFACE ..................................................................................... 16
DIGITAL HIGH PASS .................................................................................................. 20
DATA OUT PIN DISABLE ........................................................................................... 21
CONTROL INTERFACE.............................................................................................. 21
TIME DIVISION MULTIPLEXED DATA OUT............................................................... 22
TDM SELECTION ....................................................................................................... 23
OVERSAMPLING RATIOS AND SIGMA-DELTA MODULATOR FREQUENCY.......... 26
MASTER CLOCK AND AUDIO SAMPLE RATES........................................................ 26
MLCK AND LRCLK PHASE RELATIONSHIP.............................................................. 27
POWER DOWN CONTROL ........................................................................................ 27
REGISTER MAP ......................................................................................................... 28
APPLICATIONS INFORMATION .........................................................................29
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 29
PACKAGE DIMENSIONS ....................................................................................30
IMPORTANT NOTICE ..........................................................................................31
ADDRESS: .................................................................................................................. 31
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PP Rev 3.0 December 2005
2