AnsweredAssumed Answered

Low capacitance probe (<2pf) vs 2pf typical ?

Question asked by Ahmed Tarek on Nov 22, 2017
Latest reply on Nov 27, 2017 by Wigros Sun

Hello everyone,

I need help with something,

I am designing an antenna for MFRC522 and i am following AN1445 see attachments,

in page 18 of 65, the application note recommends using a low capacitance probe (<2pf) in order to measure a parameter in the receiving circuit.


i found the following low capacitance probe to use it with my oscilloscope, but it is (2pf) typical 


however, there is another low capacitance probe (0.3 pf), but the cost is relatively higher,


If i use the 2pf probe, will that still comply with An1445, if not, could any one suggest a better choice,


Thank in advance,