I can use your help.
I need a high precision capacitor to implement the RC match filter across an inductor to measure the current through it.
Picture taken from (IC is not relevant in this question): http://www.ti.com/product/LM27403/datasheet/detailed_description
You can imagine that the capacitor needs to be very precise in order to effectively match the L/DCR of the inductor to the R*C time constant.
What I'm asking is, can you recommend any material or type of capacitor that I can use the best. [Deleted own requirements, question will be obsolete for others] I know that this technique is not rock solid because of environmental influences, that why a high precision capacitor here is mandatory.
Thanks for your time and support :)