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I was wondering if I could use capsense as a high resolution capacitance to digital converter.
The range of the measurements would be below 45 pF, but I would need a measurement resolution of approximately 1fF.
Is it possible to achieve such a resolution with capsense? If not, what kind of resolution/range can I achieve?
Solved! Go to Solution.
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If you use the component function: Enable self-test library.
You can get the capacitance in the pin :
* Component configuration does not influence measurement. It is done with the following
* parameter settings:
* - Modulator clock frequency - as high as possible
* - Sense clock source - Direct
* - IDAC sensing configuration - IDAC sourcing
* - Compensation IDAC - Disabled
* - Resolution - 10 bits
And, you only can get the resolution of approximately 1pf, not 1fF.
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If you use the component function: Enable self-test library.
You can get the capacitance in the pin :
* Component configuration does not influence measurement. It is done with the following
* parameter settings:
* - Modulator clock frequency - as high as possible
* - Sense clock source - Direct
* - IDAC sensing configuration - IDAC sourcing
* - Compensation IDAC - Disabled
* - Resolution - 10 bits
And, you only can get the resolution of approximately 1pf, not 1fF.