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WM8950 Production Data
w PD, Rev 4.4, November 2011
2
TABLE OF CONTENTS
DESCRIPTION ....................................................................................................... 1
FEATURES ............................................................................................................ 1
APPLICATIONS ..................................................................................................... 1
TABLE OF CONTENTS ......................................................................................... 2
PIN CONFIGURATION .......................................................................................... 3
ORDERING INFORMATION ........... .. ........... .. .. ........... .. .. .. ........... .. ... .. ........... .. .. .. .. 3
PIN DESCRIPTION ................................................................................................ 4
ABSOLUTE MAXIMUM RATINGS ........................................................................ 5
RECOMMENDED OPERATING CONDITIONS ..................................................... 5
ELECTRICAL CHARACTERISTICS ........... .. .. .. ......... .. .. .. ... .. .. ................. ... .. .. .. .. .. 6
TERMINOLOGY .............................................................................................................. 7
SIGNAL TIMING REQUI REMENTS ............ .. .. ...................................................... 8
SYSTEM CLOCK TIMING ............................................................................................... 8
AUDIO INTERFACE TIMING – MASTER MODE ............................................................ 8
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................... 9
CONTROL INTERFACE TIMING – 3-WIRE MODE ...................................................... 10
CONTROL INTERFACE TIMING – 2-WIRE MODE ...................................................... 11
DEVICE DESCRIPTION ...................................................................................... 12
INTRODUCTION ........................................................................................................... 12
INPUT SIGNAL PATH ................................................................................................... 13
ANALOGUE TO DIGITAL CONVERTER (ADC) ........................................................... 18
INPUT AUTOMATIC LEVEL CONTROL (ALC) ............................................................. 21
DIGITAL AUDIO INTERFACES ..................................................................................... 38
AUDIO SAMPLE RATES ............................................................................................... 43
MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ................................................ 43
GENERAL PURPOSE INPUT/OUTPUT ........................................................................ 45
CONTROL INTERFACE ................................................................................................ 46
RESETTING THE CHIP ....................................................................................... 47
POWER SUPPLIES ....................................................................................................... 47
ADC POWER UP/DOWN SEQUENCE ......................................................................... 48
POWER MANAGEMENT .............................................................................................. 49
REGISTER MAP .................................................................................................. 50
DIGITAL FILTER CHARACTERISTICS .............................................................. 51
TERMINOLOGY ............................................................................................................ 51
ADC FILTER RESPONSES .......................................................................................... 52
DE-EMPHASIS FILTER RESPONSES ......................................................................... 53
HIGHPASS FILTER ....................................................................................................... 54
5-BAND EQUALISER .................................................................................................... 55
APPLICATIONS INFORMATION ... .. .. .. .. ........... .. ........... .. ........... .. ........... .. ......... 59
RECOMMENDED EXTERNAL COMPONENTS ........................................................... 59
PACKAGE DIAGRAM ......................................................................................... 60
IMPORTANT NOTICE ......... .. .. .. .. ... .. .. .. .. ........... .. ........... .. ........... .. ........... .. ......... 61
ADDRESS ..................................................................................................................... 61
REVISION HISTORY ........................................................................................... 62