wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 107

• Manufacturer Part Number: wm9081
• Description: Mono Dac With 2.6w Class Ab/d Speaker Driver, Dynamic Range Controller And Retune Mobile Parametric Equalizer
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
Figure 70 EMI Reduction Techniques
Note: Refer to the application note WAN_0118 on ‘Guidelines on How to Use QFN Packages and Create Associated
w
PCB Footprints’
LC passive filtering will usually be effective at reducing EMI at frequencies up to around 30MHz. To
reduce emissions at higher frequencies, ferrite beads placed as close to the device as possible will
be more effective.
PP, Rev 3.0, April 2009
WM9081
107