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WM8959 Datasheet(PDF) 153 Page - Wolfson Microelectronics plc

Part # WM8959
Description  Mobile Multimedia DAC with Dual-Mode Class AB/D Speaker Driver
PDF  155 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8959 Datasheet(HTML) 153 Page - Wolfson Microelectronics plc

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Pre-Production
WM8959
w
PP, May 2008, Rev 3.1
153
RECOMMENDED EXTERNAL COMPONENTS
Notes:
1. Wolfson recommends using a single, common ground reference. Where this is not possible care should be taken to optimise split ground
configuration for audio performance.
2. Supply decoupling capacitors on DCVDD, DBVDD, SPKVDD, HPVDD and AVDD should be positioned as close to the WM8959 as
possible. Values indicated are minimum requirements.
3. Capacitor types should be carefully chosen. Capacitors with very low ESR are recommended for optimum performance.
4. The loudspeaker should be connected as close as possible to the WM8959. When this is not possible, filtering should be placed on the
speaker outputs close to the WM8959.
5. The 2k2 MICBIAS resistors on each of the MIC inputs are typical values and will be suitable for many electret type microphones.
However, it is recommended that engineers refer to individual microphone specifications prior to finalising the value of this component.
WM8959
AVDD
DCVDD
SPKVDD
HPVDD
DBVDD
MODE
SDIN
SCLK
CSB/ADDR
MCLK
DACDAT
DACLRC
BCLK
GPIO1
GPIO5/DACDAT2
GPIO4/DACLRC2
GPIO3/BCLK2
LIN1
LIN4/RXN
LIN3/GPI7
LIN2
RIN1
RIN4/RXP
RIN3/GPI8
RIN2
AGND
HPGND
SPKGND
DGND
MICBIAS
VMID
LOP
LON
ROP
RON
SPKP
SPKN
OUT3
OUT4
LOUT
ROUT
BB
(Voice CODEC)
1 F
1 F
1 F
1 F
LINE
OUTPUTS
1 F
1 F
220 F
220 F
8 OHM
LOUDSPEAKER
16 or 32 OHM
EAR SPEAKER
16 or 32 OHM
HEADPHONES
4.7 F
4.7 F
4.7 F
CONTROL INTERFACE
(2, 3 or 4-wire via GPIO)
AUDIO INTERFACE
GPIO
4.7 F
4.7 F
0.1 F
0.1 F
Vbatt
DVDD
AVDD
1 F
1 F
1 F
1 F
1 F
1 F
LINE INPUT
(FM Radio)
LINE INPUT
(Melody Chip)
MICBIAS
MICBIAS
2k2
2k2
HEADSET
MIC
HANDSET
MIC
AGND



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