WM8993 datasheet(2/229 Pages) WOLFSON

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WM8993

Production Data

PD, November 2010, Rev 4.0

TABLE OF CONTENTS

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

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

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

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

BLOCK DIAGRAM .................................................................................................5

PIN CONFIGURATION...........................................................................................6

ORDERING INFORMATION ..................................................................................6

PIN DESCRIPTION ................................................................................................7

ABSOLUTE MAXIMUM RATINGS.........................................................................9

RECOMMENDED OPERATING CONDITIONS .....................................................9

THERMAL PERFORMANCE ...............................................................................10

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

TERMINOLOGY........................................................................................................... 25

TYPICAL PERFORMANCE..................................................................................26

POWER CONSUMPTION............................................................................................ 26

AUDIO SIGNAL PATHS DIAGRAM .....................................................................27

SIGNAL TIMING REQUIREMENTS .....................................................................28

MASTER CLOCK ......................................................................................................... 28

AUDIO INTERFACE TIMING ....................................................................................... 29

MASTER MODE .......................................................................................................................................................... 29

SLAVE MODE ............................................................................................................................................................. 30

TDM MODE ................................................................................................................................................................. 31

CONTROL INTERFACE TIMING ................................................................................. 32

DEVICE DESCRIPTION.......................................................................................33

INTRODUCTION.......................................................................................................... 33

INPUT SIGNAL PATH.................................................................................................. 35

MICROPHONE INPUTS .............................................................................................................................................. 36

MICROPHONE BIAS CONTROL................................................................................................................................. 36

MICROPHONE CURRENT DETECT........................................................................................................................... 37

LINE AND VOICE CODEC INPUTS ............................................................................................................................ 37

INPUT PGA ENABLE .................................................................................................................................................. 38

INPUT PGA CONFIGURATION................................................................................................................................... 39

INPUT PGA VOLUME CONTROL ............................................................................................................................... 41

INPUT MIXER ENABLE............................................................................................................................................... 43

INPUT MIXER CONFIGURATION AND VOLUME CONTROL..................................................................................... 43

ANALOGUE TO DIGITAL CONVERTER (ADC) .......................................................... 46

ADC DIGITAL VOLUME CONTROL ............................................................................................................................ 46

HIGH PASS FILTER.................................................................................................................................................... 48

DIGITAL MIXING ......................................................................................................... 49

DIGITAL MIXING PATHS ............................................................................................................................................ 49

DAC INTERFACE VOLUME BOOST........................................................................................................................... 51

DIGITAL SIDETONE ................................................................................................................................................... 51

DYNAMIC RANGE CONTROL (DRC).......................................................................... 52

COMPRESSION/LIMITING CAPABILITIES................................................................................................................. 52

GAIN LIMITS ............................................................................................................................................................... 54

DYNAMIC CHARACTERISTICS.................................................................................................................................. 55

ANTI-CLIP CONTROL ................................................................................................................................................. 56

QUICK RELEASE CONTROL...................................................................................................................................... 56

GAIN SMOOTHING ..................................................................................................................................................... 57

INITIALISATION .......................................................................................................................................................... 58

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