WM8750 datasheet(2/60 Pages) WOLFSON

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WM8750BL

Production Data

PD, Rev 4.1, August 2012

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

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............................................................................................................... 35

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

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

AUDIO INTERFACE CONTROL................................................................................................... 41

CLOCKING AND SAMPLE RATES .............................................................................................. 43

CONTROL INTERFACE ............................................................................................................... 45

POWER SUPPLIES ...................................................................................................................... 46

POWER MANAGEMENT.............................................................................................................. 46

REGISTER MAP............................................................................................................... 49

DIGITAL FILTER CHARACTERISTICS........................................................................... 50

TERMINOLOGY............................................................................................................................ 50

DAC FILTER RESPONSES.......................................................................................................... 51

ADC FILTER RESPONSES.......................................................................................................... 52

DE-EMPHASIS FILTER RESPONSES ........................................................................................ 53

HIGHPASS FILTER ...................................................................................................................... 54

APPLICATIONS INFORMATION ..................................................................................... 55

RECOMMENDED EXTERNAL COMPONENTS .......................................................................... 55

LINE INPUT CONFIGURATION ................................................................................................... 56

MICROPHONE INPUT CONFIGURATION .................................................................................. 56

MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS........................................................ 56

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

IMPORTANT NOTICE ...................................................................................................... 59

ADDRESS ..................................................................................................................................... 59

REVISION HISTORY........................................................................................................ 60

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