Dear Technical Support Team,
I think that evaluator compares the capacitance value between measuring instrument and FDC1004 for checking the accuracy of FDC1004(Figure1).
In general, measuring the capacitance between two point.
How does TI measure it for evaluating FDC1004?
Does TI measure the capacitance value between electrode and what thing?
Figure2 shows a capacitive sensor on Citation of the literature.
It described that the reason why touch sensor can detect the capacitance of human body is that the signal from touch sensor follows below route.
Touch sensor＞electrode＞Human body＞capacitance of space＞GND（wall of shield room）
In this case, I think that measuring instrument should measure the capacitance between electrode and wall of shield room.
Best Regards,
y.i
