WM9712L datasheet(2/77 Pages) WOLFSON

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WM9712L

Production Data

PD Rev 4.5 August 2006

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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