WM8945 View Datasheet(PDF) - Wolfson Microelectronics plc
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WM8945 Datasheet PDF : 169 Pages
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WM8945
Production Data
POWER MANAGEMENT ............................................................................................. 102
THERMAL SHUTDOWN .............................................................................................. 103
POWER ON RESET .................................................................................................... 104
RECOMMENDED POWER UP/DOWN SEQUENCE................................................... 106
SOFTWARE RESET AND DEVICE ID......................................................................... 107
REGISTER MAP ................................................................................................ 108
REGISTER BITS BY ADDRESS .................................................................................. 113
DIGITAL FILTER CHARACTERISTICS ............................................................ 157
TERMINOLOGY ...................................................................................................................................... 157
ADC FILTER RESPONSE............................................................................................ 158
ADC HIGHPASS FILTER RESPONSE ........................................................................ 159
DAC FILTER RESPONSE............................................................................................ 160
APPLICATIONS INFORMATION ...................................................................... 162
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 162
AUDIO INPUT PATHS............................................................................................................................. 162
HEADPHONE / LINE OUTPUT PATHS .................................................................................................. 162
BTL SPEAKER OUTPUT CONNECTION ............................................................................................... 163
POWER SUPPLY DECOUPLING ........................................................................................................... 163
MICROPHONE BIAS CIRCUIT ............................................................................................................... 164
VIDEO BUFFER COMPONENTS............................................................................................................ 165
RECOMMENDED EXTERNAL COMPONENTS DIAGRAM.................................................................... 166
PCB LAYOUT CONSIDERATIONS ............................................................................. 166
PACKAGE DIMENSIONS.................................................................................. 167
IMPORTANT NOTICE ....................................................................................... 168
ADDRESS: ................................................................................................................... 168
REVISION HISTORY ......................................................................................... 169
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PD, May 2011, Rev 4.1
4
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