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WM8731 Datasheet(PDF) 2 Page - Wolfson Microelectronics plc

Part No. WM8731
Description  Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
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Maker  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
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WM8731 Datasheet(HTML) 2 Page - Wolfson Microelectronics plc

 
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WM8731 / WM8731L
Production Data
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PD Rev 4.3 August 2006
2
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
PIN CONFIGURATION - 28 PIN SSOP.................................................................3
ORDERING INFORMATION ..................................................................................3
PIN CONFIGURATION – 28 PIN QFN ...................................................................4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS .........................................................................6
RECOMMENDED OPERATING CONDITIONS – WM8731 ...................................6
RECOMMENDED OPERATING CONDITIONS – WM8731L.................................6
ELECTRICAL CHARACTERISTICS – WM8731 ....................................................7
TERMINOLOGY .....................................................................................................9
POWER CONSUMPTION – WM8731 ..................................................................10
ELECTRICAL CHARACTERISTICS – WM8731L................................................11
TERMINOLOGY ...................................................................................................13
POWER CONSUMPTION – WM8731L................................................................14
MASTER CLOCK TIMING....................................................................................15
DIGITAL AUDIO INTERFACE – MASTER MODE ....................................................... 16
DIGITAL AUDIO INTERFACE – SLAVE MODE .......................................................... 17
MPU INTERFACE TIMING .......................................................................................... 18
DEVICE DESCRIPTION .......................................................................................20
INTRODUCTION ......................................................................................................... 20
AUDIO SIGNAL PATH................................................................................................. 21
DEVICE OPERATION ................................................................................................. 33
AUDIO DATA SAMPLING RATES............................................................................... 40
ACTIVATING DSP AND DIGITAL AUDIO INTERFACE .............................................. 44
SOFTWARE CONTROL INTERFACE......................................................................... 44
POWER DOWN MODES ............................................................................................ 46
REGISTER MAP ......................................................................................................... 48
DIGITAL FILTER CHARACTERISTICS ...............................................................53
TERMINOLOGY .......................................................................................................... 54
DAC FILTER RESPONSES .................................................................................55
ADC FILTER RESPONSES .................................................................................56
ADC HIGH PASS FILTER ........................................................................................... 57
DIGITAL DE-EMPHASIS CHARACTERISTICS ...................................................58
APPLICATIONS INFORMATION .........................................................................59
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 59
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS........................................ 60
PACKAGE DIMENSIONS - SSOP .......................................................................61
PACKAGE DIMENSIONS - QFN..........................................................................62
IMPORTANT NOTICE ..........................................................................................63
ADDRESS: .................................................................................................................. 63


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