WM8912 查看數據表（PDF） - Cirrus Logic

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WM8912

Ultra Low Power DAC with Headphone Driver for Portable Audio Applications

Cirrus Logic 

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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 4.1, February 2013

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