WM8956 datasheet(2/80 Pages) WOLFSON

2 / 80 page

WM8956

Preliminary Technical Data

PTD, July 2007, Rev 2.1

TABLE OF CONTENTS

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

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

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

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

PIN CONFIGURATION...........................................................................................3

ORDERING INFORMATION ..................................................................................3

PIN DESCRIPTION ................................................................................................4

ABSOLUTE MAXIMUM RATINGS.........................................................................5

RECOMMENDED OPERATING CONDITIONS .....................................................5

ELECTRICAL CHARACTERISTICS ......................................................................6

OUTPUT PGA GAIN.............................................................................................10

TYPICAL POWER CONSUMPTION ....................................................................11

SIGNAL TIMING REQUIREMENTS .....................................................................12

SYSTEM CLOCK TIMING............................................................................................ 12

AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 12

AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 13

CONTROL INTERFACE TIMING – 2-WIRE MODE ..................................................... 14

INTERNAL POWER ON RESET CIRCUIT ..........................................................15

DEVICE DESCRIPTION.......................................................................................17

INTRODUCTION.......................................................................................................... 17

INPUT SIGNAL PATH.................................................................................................. 18

OUTPUT SIGNAL PATH.............................................................................................. 26

ANALOGUE OUTPUTS ............................................................................................... 32

ENABLING THE OUTPUTS......................................................................................... 35

HEADPHONE OUTPUT............................................................................................... 36

CLASS D SPEAKER OUTPUTS .................................................................................. 37

VOLUME UPDATES .................................................................................................... 38

HEADPHONE JACK DETECT ..................................................................................... 40

THERMAL SHUTDOWN .............................................................................................. 42

GENERAL PURPOSE INPUT/OUTPUT ...................................................................... 42

DIGITAL AUDIO INTERFACE...................................................................................... 43

AUDIO INTERFACE CONTROL .................................................................................. 47

CLOCKING AND SAMPLE RATES.............................................................................. 50

CONTROL INTERFACE .............................................................................................. 57

POWER MANAGEMENT ............................................................................................. 57

DIGITAL FILTER CHARACTERISTICS ...............................................................73

DAC FILTER RESPONSES ......................................................................................... 73

DE-EMPHASIS FILTER RESPONSES ........................................................................ 75

APPLICATIONS INFORMATION .........................................................................76

RECOMMENDED EXTERNAL COMPONENTS........................................................... 76

PACKAGE DRAWING..........................................................................................79

IMPORTANT NOTICE ..........................................................................................80

ADDRESS:................................................................................................................... 80

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