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PDF WM9081 Data sheet ( Hoja de datos )
| Número de pieza | WM9081 | |
| Descripción | Mono DAC | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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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
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Pre-Production, April 2009, Rev 3.0
Copyright ©2009 Wolfson Microelectronics plc
1 page  
Pre-Production
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
NAME
LRCLK
DACDAT
DCVDD
DBVDD
DGND
SWMODE
SCIM/CHANNEL
8 ¯C¯S¯ /ADDR1/4FS
9 SDIN/ENA
10 SCLK
11 SDOUT/ADDR0
12 I¯R¯Q¯
13 SPKOUTP
14 SPKGND
15 SPKGND
16 SPKOUTN
17 SPKOUTN
18 SPKVDD
19 SPKVDD
20 IN2
21 IN1
22 LINEOUT
23 VMIDC
24 AGND
25 AVDD
26 NC
27 MCLK
28 BCLK
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
Digital Input / Output
Digital Input / Output
WM9081
DESCRIPTION
Audio interface DAC left / right clock
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
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PP, Rev 3.0, April 2009
5
5 Page 
Pre-Production
WM9081
DAC to Lineout Playback - DAC input to LINEOUT pin with 10kΩ load.
Test conditions:
• Slave mode, MCLK = 12.288MHz, LRCLK = 48kHz
• Input signal: 0dBFS 1kHz sine wave
Variant test conditions
AVDD
DAC to LINEOUT, no input signal
DAC to LINEOUT, 0dBFS input signal
V mA
3.3 1.9
3.3 1.9
DCVDD
V mA
1.8 1.3
1.8 1.4
DBVDD
V mA
1.8 0.0
1.8 0.0
SPKVDD
V mA
5.0 0.0
5.0 0.0
TOTAL
mW
8.5
9.0
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PP, Rev 3.0, April 2009
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM9081.PDF ] | |
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