WM8750BL
TABLE OF CONTENTS
Production Data
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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PD, Rev 4.1, August 2012
2
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
