WM8903 datasheet(3/178 Pages) WOLFSON

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Production Data

WM8903

PD, Rev 4.5, June 2012

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM ................................................................................................ 2

TABLE OF CONTENTS......................................................................................... 3

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

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

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

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

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

ELECTRICAL CHARACTERISTICS ..................................................................... 9

TERMINOLOGY............................................................................................................... 9

COMMON TEST CONDITIONS ....................................................................................... 9

INPUT SIGNAL PATH.................................................................................................... 10

OUTPUT SIGNAL PATH ................................................................................................ 12

BYPASS PATH .............................................................................................................. 14

CHARGE PUMP............................................................................................................. 15

FLL ................................................................................................................................. 15

OTHER PARAMETERS ................................................................................................. 15

POWER CONSUMPTION.................................................................................... 17

COMMON TEST CONDITIONS ..................................................................................... 17

POWER CONSUMPTION MEASUREMENTS............................................................... 17

SIGNAL TIMING REQUIREMENTS .................................................................... 19

COMMON TEST CONDITIONS ..................................................................................... 19

MASTER CLOCK ........................................................................................................... 19

AUDIO INTERFACE TIMING ......................................................................................... 20

MASTER MODE .............................................................................................................................................................. 20

SLAVE MODE.................................................................................................................................................................. 21

TDM MODE ..................................................................................................................................................................... 22

CONTROL INTERFACE TIMING ................................................................................... 23

DIGITAL FILTER CHARACTERISTICS .............................................................. 24

DAC FILTER RESPONSES ........................................................................................... 25

ADC FILTER RESPONSES ........................................................................................... 26

ADC HIGH PASS FILTER RESPONSES....................................................................... 27

DE-EMPHASIS FILTER RESPONSES .......................................................................... 28

DEVICE DESCRIPTION ...................................................................................... 29

INTRODUCTION............................................................................................................ 29

ANALOGUE INPUT SIGNAL PATH ............................................................................... 30

INPUT PGA ENABLE ...................................................................................................................................................... 31

INPUT PGA CONFIGURATION ...................................................................................................................................... 31

SINGLE-ENDED INPUT .................................................................................................................................................. 33

DIFFERENTIAL LINE INPUT........................................................................................................................................... 33

DIFFERENTIAL MICROPHONE INPUT.......................................................................................................................... 34

INPUT PGA GAIN CONTROL ......................................................................................................................................... 34

INPUT PGA COMMON MODE AMPLIFIER .................................................................................................................... 36

ELECTRET CONDENSER MICROPHONE INTERFACE.............................................. 37

MICBIAS CURRENT DETECT ........................................................................................................................................ 37

MICBIAS CURRENT DETECT FILTERING .................................................................................................................... 38

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