Folks,
Check out this datasheet which is for X7R caps that are called "high dielectric constant". I need a 22uF/16V to store nearly all its charge for about 40sec, which is afterwards used up by some electronics.
To be exact, this cap:
No (!) datasheet is provided so I searched Murata and found it:
The 1st weirdness is on the bottom of page 17, insulation resistance "More than 100,000Mohm or 1000ohms * F, whichever is smaller". Now a
22uF ceramic can hardly be 1000ohms times 0.000022, right? Or did some characters not render correctly in Foxit Reader?The 2nd weirdness is the graph on the top right of page 25. These are supposed to be X7R caps and the graph looks more like Z5U.
Did anyone use these caps and could shed some light on this?