WM9081 Datasheet, PDF (1/103 Pages) Cirrus Logic – Mono DAC with 2.6W Class AB/D Speaker Driver, Dynamic Range Controller and ReTune™ Mobile Parametric Equalizer

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.
BLOCK DIAGRAM
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, I²S, 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
IN1
IN2
___
CS/ADDR1/4FS
SCLK
SDIN/ENA
SDOUT/ADDR0
SCIM/CHANNEL
SWMODE
___
IRQ
CONTROL
INTERFACE
0dB / -6dB
0dB / -6dB
DBVDD DGND DCVDD
SPKVDD SPKGND
+6dB to -57dB,
1dB steps
LINEOUT
DIGITAL FILTERS
VOLUME
CONTROL
PARAMETRIC EQ
DYNAMIC RANGE
CONTROLLER
DAC
MIXER
+6dB to -57dB,
1dB steps _SPKOUTP
Speaker Boost
+5.1dB to 0dB
SPKOUTN
DACDAT
BCLK
LRCLK
MCLK
DIGITAL AUDIO
INTERFACE
CLOCK
CONTROL
FLL
WM9081
Voltage
Reference
AVDD
VMIDC
AGND
http://www.cirrus.com
Copyright  Cirrus Logic, Inc., 2008–2016
(All Rights Reserved)
Rev 4.0
DEC ‘16