WM8501
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
Production Data
Figure 17 External Component Diagram
In an application where ENABLE is fed directly from VDD rather than a dedicated control line,
resistor R3 and capacitor C9 are used on the ENABLE pin to introduce a short delay in the Low to
High transition of ENABLE. This will ensure the pin goes high after power supplies have had time
to settle (see “ENABLE Operation” in the “Hardware Control Modes” section of the datasheet).
However, if the ENABLE signal is being provided from an external controller chip rather than VDD
directly, R3 and C9 will not be required.
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PD, Rev 4.3, February 2013
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