WM9081
Mono DAC with 2.6W Class AB/D Speaker Driver, Dynamic
Range Controller and ReTune™ Mobile Parametric Equalizer
DESCRIPTION
The WM9081 is designed to provide high power output at
low distortion levels in space-constrained portable
applications.
ReTune
TM
Mobile Parametric EQ with fully programmable
coefficients is integrated for optimization of speaker
characteristics. Programmable dynamic range control is also
available for maximizing loudness, protecting speakers from
clipping and preventing premature shutdown due to battery
droop.
Digital input enables the power drivers to be located close to
the speakers in multi-channel systems without the need for
troublesome long analogue connections. Location of the
power drivers close to the speakers also removes the need
for bulky and expensive class D filters and reduces PCB
track lengths, minimising emissions. The digital input can
also help to minimise crosstalk to the speaker output
signal from high gain microphone inputs, enhancing stability
and reducing the risk of ‘howling’ during speakerphone
operation.
Four control interface addresses and four-channel TDM are
supported to allow multiple devices to be configured and
driven independently.
The device is controlled via a standard 2-wire, 3-wire, or 4-
wire control interface or by hardware control pins.
FEATURES
High-power, high performance DAC and speaker driver
92dB SNR (‘A-weighted’) in Class D mode
97dB SNR (‘A-weighted’) in Class AB mode
<0.05% THD+N @0.5W continuous into 4Ω (Class D)
<0.10% THD+N @2W continuous into 4Ω (Class D)
2.6W maximum peak power
ReTune
TM
Mobile Parametric Equalizer
Fully programmable filter coefficients
Programmable dynamic range controller
Boosts small signals to maximise loudness
Protects against battery droop and clipping
Speaker common mode boost
Maximises power for a given SPKVDD/AVDD ratio
Low power FLL
Provides all necessary internal clocks
32kHz to 27MHz input frequency
All common sample rates from 8kHz to 96kHz supported
Standard 2-wire, 3-wire, 4-wire and hardware control
modes
Data formats: LJ, RJ, I
2
S, DSP, all with TDM support
Thermal shutdown interrupt
4x4 COL package (0.45mm lead pitch)
Operating temperature range: -40°C to 85°C
APPLICATIONS
Portable navigation systems
Mobile phones
Flat panel TVs
BLOCK DIAGRAM
DBVDD
0dB / -6dB
DGND
DCVDD
SPKVDD SPKGND
+6dB to -57dB,
1dB steps
IN1
0dB / -6dB
IN2
___
CS/ADDR1/4FS
SCLK
SDIN/ENA
SDOUT/ADDR0
SCIM/CHANNEL
SWMODE
___
IRQ
DACDAT
BCLK
LRCLK
MCLK
FLL
LINEOUT
DIGITAL FILTERS
VOLUME
CONTROL
PARAMETRIC EQ
DYNAMIC RANGE
CONTROLLER
+6dB to -57dB,
1dB steps
SPKOUTP
SPKOUTN
CONTROL
INTERFACE
DAC
Speaker Boost
+5.1dB to 0dB
MIXER
DIGITAL AUDIO
INTERFACE
CLOCK
CONTROL
AVDD
Voltage
Reference
VMIDC
WM9081
AGND
http://www.cirrus.com
Copyright
Cirrus Logic, Inc., 2008–2016
(All Rights Reserved)
Rev 4.0
DEC ‘16
WM9081
TABLE OF CONTENTS
DESCRIPTION ................................................................................................................ 1
FEATURES ..................................................................................................................... 1
APPLICATIONS.............................................................................................................. 1
BLOCK DIAGRAM ......................................................................................................... 1
TABLE OF CONTENTS .................................................................................................. 2
PIN CONFIGURATION ................................................................................................... 3
ORDERING INFORMATION ........................................................................................... 3
PIN DESCRIPTION ......................................................................................................... 4
ABSOLUTE MAXIMUM RATINGS ................................................................................. 5
RECOMMENDED OPERATING CONDITIONS .............................................................. 5
ELECTRICAL CHARACTERISTICS .............................................................................. 6
COMMON TEST CONDITIONS ................................................................................................. 6
AUDIO DAC ............................................................................................................................... 6
DIGITAL INTERFACES .............................................................................................................. 8
CLOCKING AND TIMING........................................................................................................... 8
TYPICAL POWER CONSUMPTION............................................................................... 9
COMMON TEST CONDITIONS ................................................................................................. 9
POWER CONSUMPTION MEASUREMENTS ........................................................................... 9
TYPICAL PERFORMANCE DATA ............................................................................... 11
SPEAKER CLASS D INTO 4Ω + 10H .................................................................................... 11
SPEAKER CLASS D INTO 8Ω + 10H .................................................................................... 11
SIGNAL TIMING REQUIREMENTS ............................................................................. 12
SYSTEM CLOCK TIMING ........................................................................................................ 12
AUDIO INTERFACE TIMING – MASTER MODE .................................................................... 13
AUDIO INTERFACE TIMING – SLAVE MODE ........................................................................ 14
CONTROL INTERFACE TIMING – 2-WIRE MODE ................................................................. 15
CONTROL INTERFACE TIMING – 3-WIRE MODE ................................................................. 16
CONTROL INTERFACE TIMING – 4-WIRE MODE ................................................................. 17
DEVICE DESCRIPTION ............................................................................................... 18
INTRODUCTION ...................................................................................................................... 18
CONTROL INTERFACE (SOFTWARE MODE) ....................................................................... 19
CONTROL INTERFACE (HARDWARE MODE) ...................................................................... 24
CONTROL WRITE SEQUENCER............................................................................................ 27
POWER ON RESET CIRCUIT ................................................................................................. 30
DYNAMIC RANGE CONTROLLER (DRC) .............................................................................. 32
RETUNE MOBILE PARAMETRIC EQUALIZER (EQ) .............................................................. 37
DIGITAL TO ANALOGUE CONVERTER (DAC) ...................................................................... 40
SIGNAL PATH CONTROL ....................................................................................................... 42
ANALOGUE OUTPUTS ........................................................................................................... 44
POP SUPPRESSION CONTROL ............................................................................................ 47
DIGITAL AUDIO INTERFACE .................................................................................................. 48
DIGITAL AUDIO INTERFACE CONTROL ............................................................................... 54
CLOCKING AND SAMPLE RATES.......................................................................................... 58
THERMAL SHUTDOWN .......................................................................................................... 67
INTERRUPTS .......................................................................................................................... 68
REFERENCE VOLTAGES AND MASTER BIAS ..................................................................... 70
POWER MANAGEMENT ......................................................................................................... 72
CHIP RESET AND ID ............................................................................................................... 73
2
Rev 4.0
WM9081
REGISTER MAP ........................................................................................................... 74
REGISTER BITS BY ADDRESS .............................................................................................. 76
DIGITAL FILTER CHARACTERISTICS ....................................................................... 95
TERMINOLOGY ....................................................................................................................... 95
DAC FILTER RESPONSES ..................................................................................................... 96
APPLICATIONS INFORMATION ................................................................................. 98
RECOMMENDED EXTERNAL COMPONENTS ...................................................................... 98
SPEAKER SELECTION ........................................................................................................... 99
PCB LAYOUT CONSIDERATIONS ......................................................................................... 99
PACKAGE DIMENSIONS ........................................................................................... 101
IMPORTANT NOTICE ................................................................................................ 102
REVISION HISTORY .................................................................................................. 103
PIN CONFIGURATION
LINEOUT
22
21
20
28
27
26
25
24
VMIDC
23
AGND
MCLK
AVDD
BCLK
NC
LRCLK
DACDAT
DCVDD
DBVDD
DGND
SWMODE
SCIM/CHANNEL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
IN1
IN2
SPKVDD
SPKVDD
SPKOUTN
SPKOUTN
SPKGND
WM9081 –
Top View
19
18
17
16
15
___
CS/ADDR1/4FS
SDOUT/ADDR0
___
IRQ
SDIN/ENA
SCLK
SPKOUTP
ORDERING INFORMATION
ORDER CODE
WM9081GICN/V
WM9081GICN/RV
Note:
Reel quantity = 3500
TEMPERATURE
RANGE
-40C to +85C
-40C to +85C
PACKAGE
28-lead COL (4x4x0.55mm)
(Pb-free)
28-lead COL (4x4x0.55mm)
(Pb-free, Tape and reel)
MSL3
260C
MOISTURE
SENSITIVITY LEVEL
MSL3
PEAK SOLDERING
TEMPERATURE
260C
Rev 4.0
SPKGND
3
WM9081
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
NAME
LRCLK
DACDAT
DCVDD
DBVDD
DGND
SWMODE
SCIM/CHANNEL
¯¯¯/ADDR1/4FS
CS
SDIN/ENA
SCLK
SDOUT/ADDR0
IRQ
¯¯¯
SPKOUTP
SPKGND
SPKGND
SPKOUTN
SPKOUTN
SPKVDD
SPKVDD
IN2
IN1
LINEOUT
VMIDC
AGND
AVDD
NC
MCLK
BCLK
Digital Input / Output
Digital Input / Output
TYPE
Digital Input / Output
Digital Input
Supply
Supply
Supply
Digital Input
Digital Input
Digital Input
Digital Input / Output
Digital Input
Digital Input/ Output
Digital Output
Analogue Output
Supply
Supply
Analogue Output
Analogue Output
Supply
Supply
Analogue Input
Analogue Input
Analogue Output
Reference
Supply
Supply
DAC digital audio data
Digital core supply
Digital buffer (I/O) supply
Digital ground (Return path for both DCVDD and DBVDD)
Selects hardware or software control mode
2-wire or 3-wire control select (Software mode) /
Left / right data channel select (Hardware mode)
3-wire chip select or 2-wire address select (Software mode) /
Normal fs input or 4fs input select (Hardware mode)
Control interface data input (Software mode) /
Device enable (Hardware mode)
Control interface clock input (Software mode)
4-wire data output or 2-wire address select (Software mode)
Interrupt signal
Positive BTL speaker output
Speaker ground (1) (Return path for SPKVDD)
Speaker ground (2) (Return path for SPKVDD)
Negative BTL speaker output (1)
Negative BTL speaker output (2)
Speaker supply (1)
Speaker supply (2)
Line input
Line input
Line output
Mid-rail voltage (VMID) decoupling connection
Analogue ground (Return path for AVDD)
Analogue supply
Not connected
Master clock
Audio interface bit clock
DESCRIPTION
Audio interface DAC left / right clock
4
Rev 4.0
WM9081
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or
beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical
Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible
to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
of this device.
Cirrus Logic tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
Supply voltages (excluding SPKVDD)
SPKVDD
Voltage range digital inputs
Voltage range analogue inputs
Junction temperature, T
J
Storage temperature after soldering
Notes
1.
Analogue, digital and speaker grounds must always be within 0.3V of each other.
MIN
-0.3V
-0.3V
DGND -0.3V
AGND -0.3V
-40ºC
-65ºC
MAX
+4.5V
+7V
DBVDD +0.3V
AVDD +0.3V
+150ºC
+150ºC
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range (Core)
Digital supply range (Buffer)
Analogue supplies range
Speaker supply range
Ground
Ambient temperature, T
A
Junction temperature, T
J
Notes
1.
2.
3.
4.
5.
6.
All digital and analogue supplies are completely independent from each other (i.e. not internally connected).
DCVDD must be less than or equal to AVDD.
DCVDD must be less than or equal to DBVDD.
AVDD must be less than or equal to SPKVDD.
SPKVDD must be high enough to support the peak output voltage when using DCGAIN and ACGAIN functions, to avoid output
waveform clipping.
Junction temperature is a function of ambient temperature and of the device operating conditions. The ambient temperature
limits and the junction temperature limits must both be observed.
SYMBOL
DCVDD
DBVDD
AVDD
SPKVDD
DGND, AGND, SPKGND
-40
-40
MIN
1.71
1.71
2.7
2.7
TYP
1.8
1.8
3.3
5.0
0
+85
+125
MAX
3.6
3.6
3.6
5.5
UNIT
V
V
V
V
V
ºC
ºC
Rev 4.0
5
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