WM8956_11 Datasheet, PDF (2/80 Pages) Wolfson Microelectronics plc – Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers

WM8956
Production Data
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
OUTPUT PGA GAIN.............................................................................................. 9
TYPICAL POWER CONSUMPTION.................................................................... 10
SIGNAL TIMING REQUIREMENTS .................................................................... 11
SYSTEM CLOCK TIMING.............................................................................................. 11
AUDIO INTERFACE TIMING – MASTER MODE .......................................................... 11
AUDIO INTERFACE TIMING – SLAVE MODE .............................................................. 12
CONTROL INTERFACE TIMING – 2-WIRE MODE....................................................... 13
INTERNAL POWER ON RESET CIRCUIT .......................................................... 14
DEVICE DESCRIPTION ...................................................................................... 16
INTRODUCTION ............................................................................................................ 16
INPUT SIGNAL PATH .................................................................................................... 17
OUTPUT SIGNAL PATH ................................................................................................ 25
ANALOGUE OUTPUTS ................................................................................................. 31
ENABLING THE OUTPUTS ........................................................................................... 34
HEADPHONE OUTPUT ................................................................................................. 35
CLASS D SPEAKER OUTPUTS .................................................................................... 36
VOLUME UPDATES ...................................................................................................... 37
HEADPHONE JACK DETECT ....................................................................................... 39
THERMAL SHUTDOWN ................................................................................................ 41
GENERAL PURPOSE INPUT/OUTPUT ........................................................................ 41
DIGITAL AUDIO INTERFACE........................................................................................ 42
AUDIO INTERFACE CONTROL .................................................................................... 46
CLOCKING AND SAMPLE RATES................................................................................ 49
CONTROL INTERFACE................................................................................................. 56
POWER MANAGEMENT ............................................................................................... 56
REGISTER MAP .................................................................................................. 59
REGISTER BITS BY ADDRESS .................................................................................... 60
DIGITAL FILTER CHARACTERISTICS .............................................................. 72
DAC FILTER RESPONSES ........................................................................................... 72
DE-EMPHASIS FILTER RESPONSES .......................................................................... 74
APPLICATIONS INFORMATION ........................................................................ 75
RECOMMENDED EXTERNAL COMPONENTS ............................................................ 75
PACKAGE DRAWING ......................................................................................... 78
IMPORTANT NOTICE ......................................................................................... 79
ADDRESS: ..................................................................................................................... 79
REVISION HISTORY ........................................................................................... 80
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PD, November 2011, Rev 4.1
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