wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 2

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8903
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
POWER CONSUMPTION .................................................................................... 14
SIGNAL TIMING REQUIREMENTS ..................................................................... 16
DIGITAL FILTER CHARACTERISTICS ............................................................... 20
DEVICE DESCRIPTION ....................................................................................... 25
w
TERMINOLOGY ............................................................................................................ 7
COMMON TEST CONDITIONS .................................................................................... 7
INPUT SIGNAL PATH ................................................................................................... 8
OUTPUT SIGNAL PATH ............................................................................................. 10
BYPASS PATH ............................................................................................................ 12
CHARGE PUMP .......................................................................................................... 13
OTHER PARAMETERS .............................................................................................. 13
COMMON TEST CONDITIONS .................................................................................. 14
POWER CONSUMPTION MEASUREMENTS ............................................................ 14
COMMON TEST CONDITIONS .................................................................................. 16
MASTER CLOCK ........................................................................................................ 16
AUDIO INTERFACE .................................................................................................... 17
CONTROL INTERFACE .............................................................................................. 19
DAC FILTER RESPONSES ......................................................................................... 21
ADC FILTER RESPONSES ......................................................................................... 22
ADC HIGH PASS FILTER RESPONSES .................................................................... 23
DE-EMPHASIS FILTER RESPONSES ........................................................................ 24
ANALOGUE INPUT SIGNAL PATH ............................................................................ 25
ELECTRET CONDENSER MICROPHONE INTERFACE ............................................ 32
DIGITAL MICROPHONE INTERFACE ........................................................................ 35
ANALOGUE-TO-DIGITAL CONVERTER (ADC) ......................................................... 37
DYNAMIC RANGE CONTROL (DRC) ......................................................................... 40
DIGITAL MIXING ......................................................................................................... 46
DIGITAL-TO-ANALOGUE CONVERTER (DAC) ......................................................... 51
OUTPUT SIGNAL PATH ............................................................................................. 56
ANALOGUE OUTPUTS ............................................................................................... 65
REFERENCE VOLTAGES AND MASTER BIAS ......................................................... 67
POP SUPPRESSION CONTROL ................................................................................ 69
CHARGE PUMP .......................................................................................................... 72
DC SERVO .................................................................................................................. 73
DIGITAL AUDIO INTERFACE ..................................................................................... 76
CLOCKING AND SAMPLE RATES ............................................................................. 87
TABLE OF CONTENTS
PP, Rev 3.1, August 2009
Pre-Production
2