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WM8988 Datasheet(PDF) 52 Page - Wolfson Microelectronics plc |
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WM8988 Datasheet(HTML) 52 Page - Wolfson Microelectronics plc |
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52 / 56 page  WM8988 Production Data w PD, Rev 4.0, October 2008 52 APPLICATIONS INFORMATION RECOMMENDED EXTERNAL COMPONENTS DBVDD DCVDD AVDD LINPUT1 RINPUT1 MODE CSB SDIN SCLK LINPUT2 RINPUT2 BCLK LRC DACDAT ADCDAT AUDIO INTERFACE (I2S/LJ/RJ/DSP) DGND AGND LOUT2 ROUT2 VREF VMID WM8988 + + + C7 C19 C17 C8 C9 C10 + C22 C23 HPVDD HPGND C4 C3 C2 C1 DVDD AVDD MCLK CONTROL INTERFACE (2 OR 3-WIRE) HIGH for 3-wire LOW for 2-wire Lineout 4.7uF 1uF 1uF 1uF 1uF 4.7uF 4.7uF 10uF 4.7uF Layout Notes: LOUT1 ROUT1 + + C14 C15 HEADPHONES 220uF 220uF 16 OR 32 OHM C21 4.7uF C20 4.7uF 10uF + + HPCOM LCOM GND GND GND GND GND GND GND GND 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. 0.1uF 0.1uF Figure 44 Recommended External Components Diagram |
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