Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

FDC2214EVM: FDC2214 EVM threshold (dead zone) problem

Part Number: FDC2214EVM
Other Parts Discussed in Thread: FDC2214

Tool/software:

Hi, I'm testing a capacitance sensor measuring with FDC2214 EVM.

During measuring, I found such a threshold problem in signal.

Sometime, the signal is blocked like above figure and it does not change well near that value.

This phenomena has occur frequently in ch3, and also occur in other channels rarely.

I did try a lot of cases of reference count, settle count and other register values, but it still show.

How can I fix it?

Thank you.

+++

Enlarged figure near dead zone that show the signal doesn't change well.