Aug 27, 2013 #1 A Amalinda Banned Joined Sep 25, 2012 Messages 104 Helped 5 Reputation 10 Reaction score 5 Trophy points 1,298 Activity points 0 For my application I need a capasitor that has very low leakage current. 0.01uF ,2nA @ 3V bias. can anyone recommend me a specific type of capacitor to buy? and another of 4.7uF lowest leakage. Ceramic/ Tantulum etc which type should I use? thank you so much.
For my application I need a capasitor that has very low leakage current. 0.01uF ,2nA @ 3V bias. can anyone recommend me a specific type of capacitor to buy? and another of 4.7uF lowest leakage. Ceramic/ Tantulum etc which type should I use? thank you so much.
Aug 27, 2013 #2 schmitt trigger Advanced Member level 5 Joined Apr 17, 2013 Messages 2,725 Helped 859 Reputation 1,722 Reaction score 850 Trophy points 1,393 Activity points 18,445 You need a film cap. The lowest leakage film caps are Teflon (PTFE) or Polystyrene (PS). But they are notoriously difficult to find. The next best would be polypropylene (PP). Don't use Polyester/Mylar (PET).
You need a film cap. The lowest leakage film caps are Teflon (PTFE) or Polystyrene (PS). But they are notoriously difficult to find. The next best would be polypropylene (PP). Don't use Polyester/Mylar (PET).
Aug 27, 2013 #3 A Amalinda Banned Joined Sep 25, 2012 Messages 104 Helped 5 Reputation 10 Reaction score 5 Trophy points 1,298 Activity points 0 thank you so much for the information. so much appreciated. p.s. Do you think Tantalum Capacitors are not so good?
thank you so much for the information. so much appreciated. p.s. Do you think Tantalum Capacitors are not so good?
Aug 27, 2013 #4 schmitt trigger Advanced Member level 5 Joined Apr 17, 2013 Messages 2,725 Helped 859 Reputation 1,722 Reaction score 850 Trophy points 1,393 Activity points 18,445 They are good, but absolutely not for the ultra-low leakage level you require. Check the datasheets.
Aug 28, 2013 #5 crutschow Advanced Member level 6 Joined Feb 22, 2012 Messages 4,463 Helped 999 Reputation 1,996 Reaction score 1,123 Trophy points 1,393 Location Colorado USA Zulu -7 Activity points 25,303 Tantalum capacitors have much higher leakage than film capacitors.