WM8985
Pre-Production
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
Figure 64 External Component Diagram
1. When operating LOUT2 and ROUT2 in class D mode, it is recommended that LC filtering is placed as close to
the LOUT2 and ROUT2 pins as possible. Low ESR components should be used for maximum efficiency. It is
recommended that a filter, consisting of a 33µH inductor and a 220nF capacitor, is used for optimal performance.
2. The addition of ferrite beads to the outputs of LOUT2 and ROUT2 will suppress any potential interference noise
produced by the class D switching clocks.
PP, Rev 3.4, October 2006
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