WM8912 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8912

Ultra Low Power DAC with Headphone Driver for Portable Audio Applications

Wolfson Microelectronics plc 

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TABLE OF CONTENTS

WM8912

DESCRIPTION .......................................................................................................1

FEATURES............................................................................................................. 1

APPLICATIONS .....................................................................................................1

BLOCK DIAGRAM .................................................................................................2

TABLE OF CONTENTS .........................................................................................3

PIN CONFIGURATION...........................................................................................6

ORDERING INFORMATION ..................................................................................6

PIN DESCRIPTION ................................................................................................7

ABSOLUTE MAXIMUM RATINGS.........................................................................8

RECOMMENDED OPERATING CONDITIONS .....................................................8

ELECTRICAL CHARACTERISTICS ......................................................................9

TERMINOLOGY ............................................................................................................ 9

COMMON TEST CONDITIONS .................................................................................... 9

OUTPUT SIGNAL PATH ............................................................................................. 10

CHARGE PUMP .......................................................................................................... 11

FLL .............................................................................................................................. 11

OTHER PARAMETERS .............................................................................................. 11

POWER CONSUMPTION ....................................................................................12

COMMON TEST CONDITIONS .................................................................................. 12

POWER CONSUMPTION MEASUREMENTS ............................................................ 13

SIGNAL TIMING REQUIREMENTS .....................................................................14

COMMON TEST CONDITIONS .................................................................................. 14

MASTER CLOCK ........................................................................................................ 14

AUDIO INTERFACE TIMING ...................................................................................... 15

MASTER MODE ........................................................................................................................................................ 15

SLAVE MODE ........................................................................................................................................................... 16

CONTROL INTERFACE TIMING ................................................................................ 17

DIGITAL FILTER CHARACTERISTICS ...............................................................18

DAC FILTER RESPONSES......................................................................................... 19

DE-EMPHASIS FILTER RESPONSES........................................................................ 20

DEVICE DESCRIPTION .......................................................................................21

INTRODUCTION ......................................................................................................... 21

DYNAMIC RANGE CONTROL (DRC) ......................................................................... 22

COMPRESSION/LIMITING CAPABILITIES ............................................................................................................... 22

GAIN LIMITS ............................................................................................................................................................. 24

DYNAMIC CHARACTERISTICS ................................................................................................................................ 24

ANTI-CLIP CONTROL ............................................................................................................................................... 25

QUICK RELEASE CONTROL.................................................................................................................................... 26

GAIN SMOOTHING ................................................................................................................................................... 26

INITIALISATION ........................................................................................................................................................ 27

RETUNETM MOBILE PARAMETRIC EQUALIZER (EQ) .............................................. 28

DEFAULT MODE (5-BAND PARAMETRIC EQ) ........................................................................................................ 28

RETUNETM MOBILE MODE....................................................................................................................................... 29

EQ FILTER CHARACTERISTICS.............................................................................................................................. 29

DIGITAL MIXING......................................................................................................... 31

DAC INTERFACE ROUTING AND CONTROL .......................................................................................................... 31

DAC INTERFACE VOLUME BOOST......................................................................................................................... 31

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PD, Rev 4.0, September 2010

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