WM8958 datasheet(2/377 Pages) WOLFSON

2 / 377 page

WM8958

Pre-Production

PP, August 2012, Rev 3.4

TABLE OF CONTENTS

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

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

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

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

BLOCK DIAGRAM ................................................................................................ 7

PIN CONFIGURATION .......................................................................................... 8

ORDERING INFORMATION.................................................................................. 8

PIN DESCRIPTION................................................................................................ 9

ABSOLUTE MAXIMUM RATINGS ...................................................................... 12

RECOMMENDED OPERATING CONDITIONS................................................... 13

THERMAL PERFORMANCE............................................................................... 14

ELECTRICAL CHARACTERISTICS ................................................................... 15

INPUT SIGNAL LEVEL .................................................................................................. 15

INPUT PIN RESISTANCE.............................................................................................. 16

PROGRAMMABLE GAINS............................................................................................. 18

OUTPUT DRIVER CHARACTERISTICS ....................................................................... 19

ADC INPUT PATH PERFORMANCE............................................................................. 20

DAC OUTPUT PATH PERFORMANCE......................................................................... 21

BYPASS PATH PERFORMANCE.................................................................................. 24

MULTI-PATH CROSSTALK ........................................................................................... 26

DIGITAL INPUT / OUTPUT ............................................................................................ 28

DIGITAL FILTER CHARACTERISTICS ......................................................................... 28

MICROPHONE BIAS CHARACTERISTICS................................................................... 29

MISCELLANEOUS CHARACTERISTICS ...................................................................... 30

TERMINOLOGY............................................................................................................. 31

TYPICAL PERFORMANCE................................................................................. 32

TYPICAL POWER CONSUMPTION .............................................................................. 32

TYPICAL SIGNAL LATENCY......................................................................................... 33

SPEAKER DRIVER PERFORMANCE ........................................................................... 34

SIGNAL TIMING REQUIREMENTS .................................................................... 35

SYSTEM CLOCKS & FREQUENCY LOCKED LOOP (FLL).......................................... 35

AUDIO INTERFACE TIMING ......................................................................................... 36

DIGITAL MICROPHONE (DMIC) INTERFACE TIMING.................................................................................................. 36

DIGITAL AUDIO INTERFACE - MASTER MODE ........................................................................................................... 37

DIGITAL AUDIO INTERFACE - SLAVE MODE............................................................................................................... 38

DIGITAL AUDIO INTERFACE - TDM MODE .................................................................................................................. 39

CONTROL INTERFACE TIMING ................................................................................... 40

DEVICE DESCRIPTION ...................................................................................... 41

INTRODUCTION............................................................................................................ 41

ANALOGUE INPUT SIGNAL PATH ............................................................................... 43

MICROPHONE INPUTS .................................................................................................................................................. 44

MICROPHONE BIAS CONTROL .................................................................................................................................... 44

MICROPHONE ACCESSORY DETECT ......................................................................................................................... 46

LINE AND VOICE CODEC INPUTS ................................................................................................................................ 46

INPUT PGA ENABLE ...................................................................................................................................................... 47

INPUT PGA CONFIGURATION ...................................................................................................................................... 48

INPUT PGA VOLUME CONTROL................................................................................................................................... 49

INPUT MIXER ENABLE................................................................................................................................................... 52

INPUT MIXER CONFIGURATION AND VOLUME CONTROL ....................................................................................... 52

DIGITAL MICROPHONE INTERFACE .......................................................................... 56

DIGITAL PULL-UP AND PULL-DOWN............................................................................................................................ 59

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