Part Number: MSP430FR2633
Hi experts,
I would like to confirm a few things about the CapTIvate Technology Guide.
Q1:Is it correct to assume that if the amplification factor of Gain is set to 1, the absolute value of capacitance can be measured based on the sample capacitor and the number of counts?
In the first place, since the minimum value of "Conversion Gain" is 100, I assume that the same concept can be applied to Gain=100.
Q2:Could you please explain the relationship between the values that can be set for Conversion Gain (100-8091) and the amplification factor?
I understand that the External Capacitor is supposed to look smaller than the Sample Capacitor, but I don't understand how it can be simply the External Capacitor/Conversion Gain.
Q3:In "Sample Capacitor Discharge", half of the sample capacitor is 0.5V, so the Vref of the Trip Detector in "Capacitance Measurement" is 1V?
Q4:Also, from the "Charge Transfer Technology", the sample capacitor is Max 64pF, so based on the "Sample Capacitor Discharge", is it correct that the measurement starts from 32pF, which is half the value?
My customer is wondering if it is possible to measure the absolute value of the capacitance detected by the self-capacitance method. When calibration is performed, Gain and Offset are automatically adjusted, so I am wondering if it is possible to turn off the calibration and apply the above idea. I received the following information in another thread before, but I thought the above method would be simpler.
Best regards,
O.H
