WM8750JL datasheet(2/61 Pages) WOLFSON

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WM8750JL

Production Data

PD, April 2012, Rev 4.1

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

RECOMMENDED OPERATION CONDITIONS ................................................................. 5

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

TYPICAL PERFORMANCE................................................................................................ 8

POWER CONSUMPTION............................................................................................................... 8

OUTPUT DRIVERS ........................................................................................................................ 9

OUTPUT PGA’S LINEARITY ........................................................................................................ 10

SIGNAL TIMING REQUIREMENTS ................................................................................. 11

SYSTEM CLOCK TIMING ............................................................................................................ 11

AUDIO INTERFACE TIMING – MASTER MODE......................................................................... 11

AUDIO INTERFACE TIMING – SLAVE MODE ............................................................................ 12

CONTROL INTERFACE TIMING – 3-WIRE MODE ..................................................................... 13

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

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

DEVICE DESCRIPTION ................................................................................................... 16

INTRODUCTION........................................................................................................................... 16

INPUT SIGNAL PATH................................................................................................................... 16

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

OUTPUT SIGNAL PATH............................................................................................................... 27

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

ENABLING THE OUTPUTS.......................................................................................................... 34

HEADPHONE SWITCH ................................................................................................................ 34

THERMAL SHUTDOWN............................................................................................................... 36

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

DIGITAL AUDIO INTERFACE ...................................................................................................... 37

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

CLOCKING AND SAMPLE RATES .............................................................................................. 44

CONTROL INTERFACE ............................................................................................................... 46

POWER SUPPLIES ...................................................................................................................... 47

POWER MANAGEMENT.............................................................................................................. 47

REGISTER MAP............................................................................................................... 50

DIGITAL FILTER CHARACTERISTICS........................................................................... 51

TERMINOLOGY............................................................................................................................ 51

DAC FILTER RESPONSES.......................................................................................................... 52

ADC FILTER RESPONSES.......................................................................................................... 53

DE-EMPHASIS FILTER RESPONSES ........................................................................................ 54

HIGHPASS FILTER ...................................................................................................................... 55

APPLICATIONS INFORMATION ..................................................................................... 56

RECOMMENDED EXTERNAL COMPONENTS .......................................................................... 56

LINE INPUT CONFIGURATION ................................................................................................... 57

MICROPHONE INPUT CONFIGURATION .................................................................................. 57

MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS........................................................ 57

POWER MANAGEMENT EXAMPLES ......................................................................................... 58

IMPORTANT NOTICE ...................................................................................................... 60

ADDRESS ..................................................................................................................................... 60

REVISION HISTORY ........................................................................................................ 61

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