WM8991 datasheet(2/174 Pages) WOLFSON

2 / 174 page

WM8991

Pre-Production

PP, May 2008, Rev 3.1

TABLE OF CONTENTS

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

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

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

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

BLOCK DIAGRAM .................................................................................................4

PIN CONFIGURATION...........................................................................................5

ORDERING INFORMATION ..................................................................................5

PIN DESCRIPTION ................................................................................................6

ABSOLUTE MAXIMUM RATINGS.........................................................................8

RECOMMENDED OPERATING CONDITIONS .....................................................8

SPEAKER POWER DE-RATING CURVE............................................................10

ELECTRICAL CHARACTERISTICS ....................................................................12

TYPICAL POWER CONSUMPTION ....................................................................24

SPEAKER DRIVER PERFORMANCE .................................................................25

HEADPHONE DRIVER PERFORMANCE............................................................25

PSRR PERFORMANCE.......................................................................................26

AUDIO SIGNAL PATHS.......................................................................................28

SIGNAL TIMING REQUIREMENTS .....................................................................29

SYSTEM CLOCK TIMING............................................................................................ 29

TEST CONDITIONS .................................................................................................... 29

AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 30

AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 31

AUDIO INTERFACE TIMING – TDM MODE ................................................................ 32

CONTROL INTERFACE TIMING – 2-WIRE MODE ..................................................... 33

CONTROL INTERFACE TIMING – 3-WIRE MODE ..................................................... 34

CONTROL INTERFACE TIMING – 4-WIRE MODE ..................................................... 35

INTERNAL POWER ON RESET CIRCUIT ..........................................................36

DEVICE DESCRIPTION.......................................................................................38

INTRODUCTION.......................................................................................................... 38

INPUT SIGNAL PATH.................................................................................................. 39

ANALOGUE TO DIGITAL CONVERTER (ADC) .......................................................... 54

DIGITAL MIXING ......................................................................................................... 57

DIGITAL TO ANALOGUE CONVERTER (DAC) .......................................................... 61

OUTPUT SIGNAL PATH.............................................................................................. 65

ANALOGUE OUTPUTS ............................................................................................... 76

THERMAL SHUTDOWN .............................................................................................. 81

GENERAL PURPOSE INPUT/OUTPUT ...................................................................... 82

DIGITAL AUDIO INTERFACE.................................................................................... 101

DIGITAL AUDIO INTERFACE CONTROL ................................................................. 113

CLOCKING AND SAMPLE RATES............................................................................ 119

CONTROL INTERFACE ............................................................................................ 127

POWER MANAGEMENT ........................................................................................... 131

POP SUPPRESSION CONTROL............................................................................... 134

POWER DOMAINS.................................................................................................... 139

DIGITAL FILTER CHARACTERISTICS .............................................................166

ADC FILTER RESPONSES ....................................................................................... 167

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