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WM9712L Datasheet(PDF) 2 Page - Wolfson Microelectronics plc

Part No. WM9712L
Description  AC97 Audio and Touchpanel CODEC
Download  77 Pages
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Maker  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
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WM9712L Datasheet(HTML) 2 Page - Wolfson Microelectronics plc

 
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WM9712L
Production Data
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PD Rev 4.5 August 2006
2
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS .........................................................................6
RECOMMENDED OPERATING CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
AUDIO OUTPUTS.......................................................................................................... 7
AUDIO INPUTS.............................................................................................................. 8
AUXILIARY MONO DAC (AUXDAC).............................................................................. 8
TOUCHPANEL AND AUXILIARY ADC .......................................................................... 9
COMPARATORS ........................................................................................................... 9
REFERENCE VOLTAGES ........................................................................................... 10
DIGITAL INTERFACE CHARACTERISTICS................................................................ 10
HEADPHONE / SPEAKER OUTPUT THD VERSUS POWER ..................................... 11
POWER CONSUMPTION............................................................................................ 12
DEVICE DESCRIPTION .......................................................................................13
INTRODUCTION.......................................................................................................... 13
AUDIO PATHS OVERVIEW......................................................................................... 14
AUDIO INPUTS ....................................................................................................15
LINE INPUT ................................................................................................................. 15
MICROPHONE INPUT................................................................................................. 15
PHONE INPUT............................................................................................................. 17
PCBEEP INPUT........................................................................................................... 18
AUDIO ADC..........................................................................................................19
RECORD SELECTOR ................................................................................................. 20
RECORD GAIN............................................................................................................ 21
AUTOMATIC LEVEL CONTROL.................................................................................. 22
AUDIO DACS .......................................................................................................25
STEREO DAC.............................................................................................................. 25
AUXILIARY DAC.......................................................................................................... 28
ANALOGUE AUDIO OUTPUTS ...........................................................................29
HEADPHONE OUTPUTS – HPOUTL AND HPOUTR.................................................. 29
EAR SPEAKER OUTPUT – OUT3............................................................................... 30
LOUDSPEAKER OUTPUTS – LOUT2 AND ROUT2.................................................... 31
PHONE OUTPUT (MONOOUT)................................................................................... 32
THERMAL SENSOR .................................................................................................... 32
JACK INSERTION AND AUTO-SWITCHING............................................................... 33
DIGITAL AUDIO (SPDIF) OUTPUT ............................................................................. 34
AUDIO MIXERS ........................................................................................................... 35
VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION ...............................37
TOUCHPANEL INTERFACE................................................................................38
PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL ..................................... 38


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