WM8971LEFLSLASHR datasheet(2/56 Pages) WOLFSON

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WM8971L

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AI Rev 3.0 March 2004

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM .................................................................................................1

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

PIN CONFIGURATION...........................................................................................4

ORDERING INFORMATION ..................................................................................4

PIN DESCRIPTION ................................................................................................5

ABSOLUTE MAXIMUM RATINGS .........................................................................6

RECOMMENDED OPERATION CONDITIONS .....................................................6

ELECTRICAL CHARACTERISTICS ......................................................................7

OUTPUT PGA’S LINEARITY ......................................................................................... 9

HEADPHONE OUTPUT THD VERSUS POWER......................................................... 10

SPEAKER OUTPUT THD VERSUS POWER .............................................................. 11

POWER CONSUMPTION ....................................................................................12

SIGNAL TIMING REQUIREMENTS .....................................................................13

SYSTEM CLOCK TIMING............................................................................................ 13

AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 13

AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 14

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

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

INPUT SIGNAL PATH.................................................................................................. 17

AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 23

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

ANALOGUE OUTPUTS ............................................................................................... 31

ENABLING THE OUTPUTS ......................................................................................... 33

HEADPHONE SWITCH ............................................................................................... 33

THERMAL SHUTDOWN .............................................................................................. 35

HEADPHONE OUTPUT ............................................................................................... 35

DIGITAL AUDIO INTERFACE...................................................................................... 36

AUDIO INTERFACE CONTROL .................................................................................. 39

CLOCKING AND SAMPLE RATES .............................................................................. 40

CONTROL INTERFACE .............................................................................................. 42

POWER SUPPLIES ..................................................................................................... 43

POWER MANAGEMENT ............................................................................................. 44

DIGITAL FILTER CHARACTERISTICS ...............................................................47

TERMINOLOGY........................................................................................................... 47

DAC FILTER RESPONSES ......................................................................................... 48

ADC FILTER RESPONSES ......................................................................................... 49

DE-EMPHASIS FILTER RESPONSES ........................................................................ 50

HIGHPASS FILTER ..................................................................................................... 51

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