WM8948 Datasheet, PDF (4/189 Pages) Wolfson Microelectronics plc – Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller

WM8948
Production Data
POWER MANAGEMENT ........................................................................................... 108
THERMAL SHUTDOWN ............................................................................................ 111
POWER ON RESET .................................................................................................. 111
RECOMMENDED POWER UP/DOWN SEQUENCE .........................................113
SOFTWARE RESET AND DEVICE ID....................................................................... 115
REGISTER MAP.................................................................................................116
REGISTER BITS BY ADDRESS ................................................................................ 122
DIGITAL FILTER CHARACTERISTICS .............................................................177
ADC FILTER RESPONSE.......................................................................................... 178
ADC HIGHPASS FILTER RESPONSE ...................................................................... 179
DAC FILTER RESPONSE.......................................................................................... 180
APPLICATIONS INFORMATION .......................................................................182
RECOMMENDED EXTERNAL COMPONENTS......................................................... 182
AUDIO INPUT PATHS............................................................................................................................. 182
HEADPHONE / LINE OUTPUT PATHS .................................................................................................. 182
BTL SPEAKER OUTPUT CONNECTION................................................................................................ 183
POWER SUPPLY DECOUPLING ........................................................................................................... 183
MICROPHONE BIAS CIRCUIT ............................................................................................................... 184
VIDEO BUFFER COMPONENTS............................................................................................................ 185
RECOMMENDED EXTERNAL COMPONENTS DIAGRAM .................................................................... 186
PCB LAYOUT CONSIDERATIONS............................................................................ 186
PACKAGE DIMENSIONS ..................................................................................187
IMPORTANT NOTICE ........................................................................................188
ADDRESS:................................................................................................................. 188
REVISION HISTORY..........................................................................................189
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PD, May 2011, Rev 4.1
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