wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 3

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
DESCRIPTION ....................................................................................................... 1
FEATURES............................................................................................................. 1
APPLICATIONS ..................................................................................................... 1
BLOCK DIAGRAM ................................................................................................. 2
TABLE OF CONTENTS ......................................................................................... 3
AUDIO SIGNAL PATHS DIAGRAM ....................................................................... 6
PIN CONFIGURATION ........................................................................................... 7
ORDERING INFORMATION .................................................................................. 7
PIN DESCRIPTION ................................................................................................ 8
ABSOLUTE MAXIMUM RATINGS ......................................................................... 9
RECOMMENDED OPERATING CONDITIONS ..................................................... 9
ELECTRICAL CHARACTERISTICS .................................................................... 10
POWER CONSUMPTION .................................................................................... 16
SIGNAL TIMING REQUIREMENTS ..................................................................... 18
DIGITAL FILTER CHARACTERISTICS ............................................................... 23
DEVICE DESCRIPTION ....................................................................................... 27
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TERMINOLOGY .......................................................................................................... 10
COMMON TEST CONDITIONS .................................................................................. 10
INPUT SIGNAL PATH ................................................................................................. 11
OUTPUT SIGNAL PATH ............................................................................................. 11
BYPASS PATH ............................................................................................................ 12
CHARGE PUMP .......................................................................................................... 13
FLL .............................................................................................................................. 13
OTHER PARAMETERS .............................................................................................. 13
COMMON TEST CONDITIONS .................................................................................. 16
POWER CONSUMPTION MEASUREMENTS ............................................................ 16
COMMON TEST CONDITIONS .................................................................................. 18
MASTER CLOCK ........................................................................................................ 18
AUDIO INTERFACE TIMING ...................................................................................... 19
CONTROL INTERFACE TIMING ................................................................................ 22
DMIC FILTER RESPONSES ....................................................................................... 24
DMIC HIGH PASS FILTER RESPONSES ................................................................... 24
DAC FILTER RESPONSES......................................................................................... 25
DE-EMPHASIS FILTER RESPONSES ........................................................................ 26
INTRODUCTION ......................................................................................................... 27
ANALOGUE INPUT SIGNAL PATH ............................................................................ 28
ELECTRET CONDENSER MICROPHONE INTERFACE ............................................ 35
MASTER MODE ........................................................................................................................................................ 19
SLAVE MODE ........................................................................................................................................................... 20
TDM MODE ............................................................................................................................................................... 21
INPUT PGA ENABLE ................................................................................................................................................ 29
INPUT PGA CONFIGURATION ................................................................................................................................. 29
SINGLE-ENDED INPUT ............................................................................................................................................ 31
DIFFERENTIAL LINE INPUT ..................................................................................................................................... 31
DIFFERENTIAL MICROPHONE INPUT .................................................................................................................... 32
INPUT PGA GAIN CONTROL.................................................................................................................................... 32
INPUT PGA COMMON MODE AMPLIFIER ............................................................................................................... 34
TABLE OF CONTENTS
PD, Rev 4.0, September 2010
WM8918
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