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Mobile Multimedia CODEC with
Dual-Mode Class AB/D Speaker Driver
DESCRIPTION
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.
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WM8990
FEATURES
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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)
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APPLICATIONS
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Multimedia phones
GPS
WOLFSON MICROELECTRONICS plc
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Production Data, March 2009, Rev 4.0
Copyright
©2009
Wolfson Microelectronics plc
WM8990
TABLE OF CONTENTS
Production Data
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
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Production Data
WM8990
DIGITAL FILTER CHARACTERISTICS ............................................................. 164
ADC FILTER RESPONSES ....................................................................................... 165
ADC HIGH PASS FILTER RESPONSES ................................................................... 165
DAC FILTER RESPONSES ....................................................................................... 166
DE-EMPHASIS FILTER RESPONSES ...................................................................... 167
APPLICATIONS INFORMATION ....................................................................... 168
RECOMMENDED EXTERNAL COMPONENTS......................................................... 168
PACKAGE DIMENSIONS .................................................................................. 171
IMPORTANT NOTICE ........................................................................................ 172
ADDRESS: ................................................................................................................. 172
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PD, March 2009, Rev 4.0
3
WM8990
LONMIX
Mixer L
Mixer R
W
+
Line
Inverted Out L
LON
0dB,
-6dB
MIC R
+
Line
-1
INPUT PGAs
MIC L
Record L
Mixer L
INPUT MIXERS
LOP
LOPMIX
Left Line Input to Speaker
Rx Voice -
Left Line Input to Left Output Mixer
Left MIC
Left ADC Bypass
Mixer L
LIN3
RXN
-12dB to +6dB
-12dB to +6dB
MONO
MIX
-
+
RXVOICE
AINLMUX
-73dB to +6dB,
1dB steps
DIFFINL
-12dB to +6dB
-12dB to +6dB
-
+
RXVOICE
AINRMUX
0
-71.625dB to
+17.625dB,
0.375dB steps
DIFFINR
ADC R
R ADC Bypass
L ADC Bypass
L MIC
R MIC
LIN3
RIN3
-12dB to 0dB,
3dB steps
Right ADC Bypass
Right MIC
Right Line Input to Right Output Mixer
Rx Voice +
Right Line Input to Speaker
Record R
+
-
-16.5dB to +30dB, 0.75dB steps
en
MICBIAS Current Detect
MICBIAS
AVDD
DCVDD
POR
A-law and u-law support
TDM Support
Alternative DAC Interface
Button Control / Accessory Detect
Clock Output
+
RIN1
RIN2
+
RIN3/GPI8
RIN4/RXP
RIN34
+
-12dB to +6dB
-16.5dB to +30dB, 0.75dB steps
-12dB to +6dB
RIN12
V
REF
Inverted Out R
Mixer L
Mixer R
50k
50k
250k
250k
5k
5k
+
-
+
LIN3/GPI7
LIN4/RXN
R MIC
R ADC Bypass
L ADC Bypass
+
LIN1
LIN2
+
+
RIN3
L MIC
-
-
-
-
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BLOCK DIAGRAM
OUTPUT MIXERS
OUT3MIX
0dB, -6dB
HP
-16.5dB to +30dB, 0.75dB steps
OUT3
LIN12
-12dB to +6dB
-16.5dB to +30dB, 0.75dB steps
-12dB to +6dB
0dB, +30dB
0dB, +30dB
DIGITAL CORE
INMIXL
-71.625dB to
+17.625dB,
0.375dB steps
-36dB to 0dB,
3dB steps
-73dB to +6dB, 1dB steps
+
LOPGA
LADC
bypass
LIN2
Mixer L
DAC L
HP
LOUT
LIN34
ADC L
-12dB to 0dB,
3dB steps
0
-71.625dB to 0dB,
0.375dB steps
SPKMIX
SPKPGA
-73dB to +6dB,
1dB steps
HIGH
PASS
FILTER
(Voice or
Hi-Fi)
+
DAC L
LOMIX
DAC L
1x,
1.27x,
1.4x,
1.52x,
1.67x
1.8x
DAC R
Mixer R
+
DAC R
+
RIN2
RADC
bypass
0dB,
-6dB,
-12dB
SPK
SPKN
SPKP
ROMIX
-73dB to +6dB,
1dB steps
0dB, +30dB
0dB,
+6dB,
+12dB,
+18dB
INMIXR
HIGH
PASS
FILTER
(Voice or
Hi-Fi)
+
DAC R
-71.625dB to 0dB,
0.375dB steps
1xVMID,
1.27xVMID,
1.4xVMID,
1.52xVMID,
1.67xVMID
1.8xVMID
ROPGA
HP
-73dB to +6dB, 1dB steps
+
ROUT
0dB, +30dB
Mixer R
RXP
+
HP
OUT4
OUT4MIX
0dB, -6dB
Mixer R
MIC L
MIC R
ROPMIX
+
0dB, -6dB
Line
-1
ROP
DIGITAL AUDIO
INTERFACE
GPIO
+
Line
RON
RONMIX
PLL
SYSCLK
POR
CONTROL
INTERFACE
VMID
AGND
BCLK
DGND
DCVDD
DBVDD
HPVDD
HPGND
DACDAT
ADCDAT
DACLRC
SPKVDD
SPKGND
ADCLRC/GPIO1
AVDD
CSB/ADDR
SDIN
SCLK
MODE
MCLK
GPIO5/DACDAT2
GPIO4/DACLRC2
GPIO3/BCLK2
PD, March 2009, Rev 4.0
Production Data
4
Production Data
WM8990
PIN CONFIGURATION
ORDERING INFORMATION
ORDER CODE
WM8990ECS/RV
Note:
Reel quantity = 3500
TEMPERATURE RANGE
-40°C to +85°C
PACKAGE
42-ball W-CSP
(Pb-free, Tape and reel)
MOISTURE
SENSITIVITY LEVEL
MSL3
PEAK SOLDERING
TEMPERATURE
260°C
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PD, March 2009, Rev 4.0
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