WM9081 PDF даташит
Спецификация WM9081 изготовлена «Wolfson Microelectronics» и имеет функцию, называемую «Mono DAC». |
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Детали детали
Номер произв | WM9081 |
Описание | Mono DAC |
Производители | Wolfson Microelectronics |
логотип |
30 Pages
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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 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 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
WOLFSON MICROELECTRONICS plc
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Pre-Production, April 2009, Rev 3.0
Copyright ©2009 Wolfson Microelectronics plc
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WM9081
Pre-Production
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................4
COL28 ........................................................................................................................... 4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS.........................................................................6
RECOMMENDED OPERATING CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
COMMON TEST CONDITIONS .................................................................................... 7
AUDIO DAC .................................................................................................................. 7
DIGITAL INTERFACES ................................................................................................. 9
CLOCKING AND TIMING.............................................................................................. 9
TYPICAL POWER CONSUMPTION ....................................................................10
COMMON TEST CONDITIONS .................................................................................. 10
POWER CONSUMPTION MEASUREMENTS ............................................................ 10
TYPICAL PERFORMANCE DATA .......................................................................12
SPEAKER CLASS D INTO 4Ω + 10μH........................................................................ 12
SPEAKER CLASS D INTO 8Ω + 10μH........................................................................ 12
SIGNAL TIMING REQUIREMENTS .....................................................................13
SYSTEM CLOCK TIMING ........................................................................................... 13
AUDIO INTERFACE TIMING – MASTER MODE ........................................................ 13
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 14
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 14
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 15
CONTROL INTERFACE TIMING – 4-WIRE MODE .................................................... 16
DEVICE DESCRIPTION .......................................................................................18
INTRODUCTION ......................................................................................................... 18
CONTROL INTERFACE (SOFTWARE MODE)........................................................... 19
CONTROL INTERFACE (HARDWARE MODE) .......................................................... 25
CONTROL WRITE SEQUENCER ............................................................................... 28
POWER ON RESET CIRCUIT .................................................................................... 31
DYNAMIC RANGE CONTROLLER (DRC) .................................................................. 33
RETUNE MOBILE PARAMETRIC EQUALIZER (EQ).................................................. 39
DIGITAL TO ANALOGUE CONVERTER (DAC).......................................................... 43
SIGNAL PATH CONTROL .......................................................................................... 46
ANALOGUE OUTPUTS............................................................................................... 49
POP SUPPRESSION CONTROL................................................................................ 51
DIGITAL AUDIO INTERFACE ..................................................................................... 53
DIGITAL AUDIO INTERFACE CONTROL................................................................... 60
CLOCKING AND SAMPLE RATES ............................................................................. 65
THERMAL SHUTDOWN ............................................................................................. 74
INTERRUPTS.............................................................................................................. 75
REFERENCE VOLTAGES AND MASTER BIAS ......................................................... 77
POWER MANAGEMENT ............................................................................................ 79
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WM9081
REGISTER MAP...................................................................................................81
REGISTER BITS BY ADDRESS ................................................................................. 83
DIGITAL FILTER CHARACTERISTICS .............................................................102
DAC FILTER RESPONSES....................................................................................... 103
APPLICATIONS INFORMATION .......................................................................105
RECOMMENDED EXTERNAL COMPONENTS ........................................................ 105
SPEAKER SELECTION ............................................................................................ 105
PCB LAYOUT CONSIDERATIONS ........................................................................... 106
PACKAGE DIMENSIONS ..................................................................................108
COL 4 X 4 X 0.55 PACKAGE .................................................................................... 108
IMPORTANT NOTICE ........................................................................................109
ADDRESS ................................................................................................................. 109
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