wm9712l Wolfson Microelectronics plc, wm9712l Datasheet - Page 2

• Manufacturer Part Number: wm9712l
• Description: Ac?97 Audio And Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

WM9712L
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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
DEVICE DESCRIPTION.......................................................................................13
AUDIO INPUTS ....................................................................................................15
AUDIO ADC..........................................................................................................19
AUDIO DACS .......................................................................................................25
ANALOGUE AUDIO OUTPUTS ...........................................................................29
VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION ...............................37
TOUCHPANEL INTERFACE................................................................................38
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
INTRODUCTION.......................................................................................................... 13
AUDIO PATHS OVERVIEW......................................................................................... 14
LINE INPUT ................................................................................................................. 15
MICROPHONE INPUT................................................................................................. 15
PHONE INPUT............................................................................................................. 17
PCBEEP INPUT ........................................................................................................... 18
RECORD SELECTOR ................................................................................................. 20
RECORD GAIN............................................................................................................ 21
AUTOMATIC LEVEL CONTROL.................................................................................. 22
STEREO DAC.............................................................................................................. 25
AUXILIARY DAC.......................................................................................................... 28
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
PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL ..................................... 38
TABLE OF CONTENTS
PD Rev 4.5 August 2006
Production Data
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