WM8750BL datasheet(2/59 Pages) WOLFSON

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WM8750BL

Pre-Production

Pre-Production Rev 3.3 January 2007

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

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