WM8973LGEFLSLASHV datasheet(2/61 Pages) WOLFSON

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WM8973L

Production Data

PD Rev 4.2 September 2005

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 THD AND NOISE 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

INTERNAL POWER ON RESET CIRCUIT ..........................................................17

DEVICE DESCRIPTION .......................................................................................18

INTRODUCTION.......................................................................................................... 18

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

AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 25

OUTPUT SIGNAL PATH.............................................................................................. 29

ANALOGUE OUTPUTS ............................................................................................... 34

ENABLING THE OUTPUTS ......................................................................................... 36

HEADPHONE SWITCH ............................................................................................... 36

THERMAL SHUTDOWN .............................................................................................. 38

HEADPHONE OUTPUT ............................................................................................... 38

DIGITAL AUDIO INTERFACE...................................................................................... 39

AUDIO INTERFACE CONTROL .................................................................................. 43

CLOCKING AND SAMPLE RATES .............................................................................. 45

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

POWER SUPPLIES ..................................................................................................... 48

POWER MANAGEMENT ............................................................................................. 48

DIGITAL FILTER CHARACTERISTICS ...............................................................52

TERMINOLOGY........................................................................................................... 52

DAC FILTER RESPONSES ......................................................................................... 53

ADC FILTER RESPONSES ......................................................................................... 54

DE-EMPHASIS FILTER RESPONSES ........................................................................ 55

HIGHPASS FILTER ..................................................................................................... 56

APPLICATIONS INFORMATION .........................................................................57

RECOMMENDED EXTERNAL COMPONENTS........................................................... 57

LINE INPUT CONFIGURATION................................................................................... 58

MICROPHONE INPUT CONFIGURATION .................................................................. 58

MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS ........................................ 58

POWER MANAGEMENT EXAMPLES ......................................................................... 59

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