LE910C1 Hardware User Guide
1VV0301298 Rev. 1.08 - 2017-11-14
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If the layout of the PCB is not well designed, a strong noise floor is generated on the ground. This
will reflect on all the audio paths producing an audible annoying noise at 216 Hz.
If the voltage drops during the peaks, current absorption is too high. The device may even shut
down as a consequence of the supply voltage drop.