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Wolfson Microelectronics

WM8990 Datasheet Preview

WM8990 Datasheet

Mobile Multimedia CODEC

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WM8990
Mobile Multimedia CODEC with
Dual-Mode Class AB/D Speaker Driver
DESCRIPTION
FEATURES
The WM8990 is a highly integrated ultra-low power hi-fi codec
designed for handsets rich in multimedia features such as
mobile TV, digital audio playback and gaming. Ultra-low power
and low noise interfaces to many other audio components in the
system are provided.
A powerful 1W speaker driver can operate in class D or AB
modes, providing total flexibility to the system designer. Low
leakage, high PSRR and pop/click suppression enable direct
battery connection for the speaker supply.
A very highly flexible input configuration supports multiple
microphone or line inputs (mono or stereo, single-ended or
differential).
Four headphone drivers support fully differential headset drive,
providing excellent crosstalk performance and bass response,
maximising stereo effects, and allowing the removal of large
and expensive headphone capacitors.
Stereo 24-bit sigma-delta ADCs and DACs provide hi-fi quality
audio record and playback, with a flexible digital audio interface
supporting most commonly-used clocking schemes. An
integrated low power PLL, an alternative DAC interface and
TDM support provide additional flexibility.
The WM8990 is supplied in very small and thin 42-ball WCSP
package, ideal for portable systems.
DAC SNR 99dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
ADC SNR 94dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
Microphone interface (Up to four differential microphones)
1W Speaker driver
- 1W into 8Ω BTL speaker at <0.1% THD
- 80dB PSRR @217Hz
- <1uA leakage with direct battery connection
- Software-selectable class D or AB mode
- Filterless connection supported
- Pop/Click suppression
Headphone / ear speaker drivers
- 40mW output power into 16Ω at 3.3V
- Fully differential and capless modes supported
- Pop/Click suppression
4 Mono or stereo differential line outputs
Powerful GPIO functions
Ultra-low power consumption
- 8.3mW analogue voice call
- 13.7mW DAC playback to headphones
On-chip PLL provides flexible clocking scheme
Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
42-ball W-CSP package (3.226x3.44x0.7mm, 0.5mm pitch)
APPLICATIONS
Multimedia phones
GPS
WOLFSON MICROELECTRONICS plc
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Production Data, March 2009, Rev 4.0
Copyright ©2009 Wolfson Microelectronics plc




Wolfson Microelectronics

WM8990 Datasheet Preview

WM8990 Datasheet

Mobile Multimedia CODEC

No Preview Available !

WM8990
Production Data
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
TABLE OF CONTENTS .........................................................................................2
BLOCK DIAGRAM .................................................................................................4
PIN CONFIGURATION...........................................................................................5
ORDERING INFORMATION ..................................................................................5
PIN DESCRIPTION ................................................................................................6
ABSOLUTE MAXIMUM RATINGS.........................................................................8
RECOMMENDED OPERATING CONDITIONS .....................................................8
THERMAL PERFORMANCE .................................................................................9
SPEAKER POWER DE-RATING CURVE............................................................10
ELECTRICAL CHARACTERISTICS ....................................................................12
TERMINOLOGY ...................................................................................................23
TYPICAL POWER CONSUMPTION ....................................................................24
SPEAKER DRIVER PERFORMANCE .................................................................25
HEADPHONE DRIVER PERFORMANCE............................................................25
PSRR PERFORMANCE.......................................................................................26
AUDIO SIGNAL PATHS.......................................................................................28
SIGNAL TIMING REQUIREMENTS .....................................................................29
SYSTEM CLOCK TIMING............................................................................................ 29
AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 30
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 31
AUDIO INTERFACE TIMING – TDM MODE ................................................................ 32
CONTROL INTERFACE TIMING – 2-WIRE MODE ..................................................... 33
CONTROL INTERFACE TIMING – 3-WIRE MODE ..................................................... 34
CONTROL INTERFACE TIMING – 4-WIRE MODE ..................................................... 35
INTERNAL POWER ON RESET CIRCUIT ..........................................................36
DEVICE DESCRIPTION .......................................................................................38
INTRODUCTION.......................................................................................................... 38
INPUT SIGNAL PATH.................................................................................................. 39
ANALOGUE TO DIGITAL CONVERTER (ADC) .......................................................... 54
DIGITAL MIXING ......................................................................................................... 58
DIGITAL TO ANALOGUE CONVERTER (DAC) .......................................................... 62
OUTPUT SIGNAL PATH.............................................................................................. 66
ANALOGUE OUTPUTS ............................................................................................... 77
THERMAL SHUTDOWN .............................................................................................. 82
GENERAL PURPOSE INPUT/OUTPUT ...................................................................... 83
DIGITAL AUDIO INTERFACE.................................................................................... 100
DIGITAL AUDIO INTERFACE CONTROL ................................................................. 112
CLOCKING AND SAMPLE RATES ............................................................................ 118
CONTROL INTERFACE ............................................................................................ 126
POWER MANAGEMENT ........................................................................................... 130
POP SUPPRESSION CONTROL............................................................................... 133
POWER DOMAINS.................................................................................................... 138
REGISTER MAP.................................................................................................139
REGISTER BITS BY ADDRESS ................................................................................ 141
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PD, March 2009, Rev 4.0
2


Part Number WM8990
Description Mobile Multimedia CODEC
Maker Wolfson Microelectronics
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WM8990 Datasheet PDF






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