wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 52

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8988
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APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
Figure 44 Recommended External Components Diagram
(I2S/LJ/RJ/DSP)
(2 OR 3-WIRE)
INTERFACE
INTERFACE
CONTROL
AUDIO
HIGH for 3-wire
Layout Notes:
1. C1 to C4, C17, C19, C20 and C21 should be as close to the relative WM8988 connecting pin as possible.
2. For capacitors C7 to C10, C14, C15, C22 and C23 it is recommended that low ESR components are used.
3. HPCOM and LCOM should be connected to GND at the connector.
LOW for 2-wire
0.1uF
GND
C1
DVDD
C2
0.1uF
4.7uF
C3
AVDD
GND
C10
C8
C9
C7
C4
4.7uF
1uF
1uF
1uF
1uF
AVDD
MCLK
BCLK
MODE
CSB
SDIN
SCLK
DBVDD
DCVDD
HPVDD
LRC
DACDAT
ADCDAT
LINPUT1
RINPUT1
LINPUT2
RINPUT2
WM8988
HPGND
HPCOM
ROUT1
ROUT2
LOUT2
LOUT1
DGND
AGND
LCOM
VREF
VMID
+
+
4.7uF
4.7uF
C20
C21
GND
10uF
10uF
+
+
+
+
+
220uF
220uF
GND
4.7uF
C17
C23
C15
C14
C22
GND
+
HEADPHONES
16 OR 32 OHM
GND
4.7uF
C19
GND
GND
Lineout
PD, Rev 4.0, October 2008
Production Data
52