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WM8959

Mobile Multimedia DAC with Dual-Mode Class AB/D Speaker Driver

Wolfson Microelectronics plc 

WM8959

TABLE OF CONTENTS

Pre-Production

DESCRIPTION ................................................................................................................. 1

FEATURES ...................................................................................................................... 1

APPLICATIONS ............................................................................................................... 1

TABLE OF CONTENTS ................................................................................................... 2

BLOCK DIAGRAM ........................................................................................................... 3

PIN CONFIGURATION..................................................................................................... 4

ORDERING INFORMATION ............................................................................................ 4

PIN DESCRIPTION .......................................................................................................... 5

ABSOLUTE MAXIMUM RATINGS ................................................................................... 7

RECOMMENDED OPERATING CONDITIONS ................................................................ 7

THERMAL PERFORMANCE............................................................................................ 8

SPEAKER POWER DE-RATING CURVE ........................................................................ 9

ELECTRICAL CHARACTERISTICS............................................................................... 11

TERMINOLOGY ............................................................................................................. 20

TYPICAL POWER CONSUMPTION............................................................................... 21

SPEAKER DRIVER PERFORMANCE............................................................................ 22

HEADPHONE DRIVER PERFORMANCE ...................................................................... 22

PSRR PERFORMANCE ................................................................................................. 23

AUDIO SIGNAL PATHS ................................................................................................. 25

SIGNAL TIMING REQUIREMENTS ............................................................................... 26

SYSTEM CLOCK TIMING .............................................................................................................26

AUDIO INTERFACE TIMING – MASTER MODE .........................................................................27

AUDIO INTERFACE TIMING – SLAVE MODE .............................................................................28

CONTROL INTERFACE TIMING – 2-WIRE MODE .....................................................................29

CONTROL INTERFACE TIMING – 3-WIRE MODE .....................................................................30

CONTROL INTERFACE TIMING – 4-WIRE MODE .....................................................................31

INTERNAL POWER ON RESET CIRCUIT ..................................................................... 32

DEVICE DESCRIPTION ................................................................................................. 34

INTRODUCTION ...........................................................................................................................34

ANALOGUE INPUT PATH ............................................................................................................35

DIGITAL INPUT PATH ..................................................................................................................50

DIGITAL TO ANALOGUE CONVERTER (DAC) ...........................................................................52

OUTPUT SIGNAL PATH ...............................................................................................................56

ANALOGUE OUTPUTS.................................................................................................................67

THERMAL SHUTDOWN ...............................................................................................................71

GENERAL PURPOSE INPUT/OUTPUT .......................................................................................72

DIGITAL AUDIO INTERFACE .......................................................................................................89

DIGITAL AUDIO INTERFACE CONTROL ..................................................................................100

CLOCKING AND SAMPLE RATES.............................................................................................104

CONTROL INTERFACE..............................................................................................................112

POWER MANAGEMENT ............................................................................................................116

POP SUPPRESSION CONTROL................................................................................................119

POWER DOMAINS .....................................................................................................................124

REGISTER MAP........................................................................................................... 125

REGISTER BITS BY ADDRESS .................................................................................................127

DIGITAL FILTER CHARACTERISTICS........................................................................ 148

DAC FILTER RESPONSES ........................................................................................................149

DE-EMPHASIS FILTER RESPONSES .......................................................................................150

APPLICATIONS INFORMATION ................................................................................. 151

RECOMMENDED EXTERNAL COMPONENTS........................................................... 153

PACKAGE DIMENSIONS............................................................................................. 154

IMPORTANT NOTICE .................................................................................................. 155

ADDRESS.................................................................................................................................... 155

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PP, May 2008, Rev 3.1

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