[SI-LIST] Re: Guard Rings ... DC - dielectric absorption effects

  • From: Cosmin Iorga <ci249534@xxxxxxxxx>
  • To: keithK EPD <epd2001usa@xxxxxxxxxxx>, si-list@xxxxxxxxxxxxx
  • Date: Mon, 22 Nov 2010 12:26:50 -0800 (PST)

Keith,
I'd like to bring one more comment on top of all the rest of good ideas and 
advices for this question:  

Depending on your specific physical design and functionality, dielectric 
absorption may affect measurements and performance due to very long time 
constant charge displacements inside the insulating materials, which from the 
circuit functionality and troubleshooting perspective may look like leakage 
currents.

Cosmin Iorga,
NoiseCoupling.com
http://www.noisecoupling.com
tel: (805) 231-9786
  





________________________________
From: keithK EPD <epd2001usa@xxxxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Sent: Thu, November 18, 2010 7:24:06 PM
Subject: [SI-LIST] Re: Guard Rings ... DC

I am dealing with DC  !   so, some of my questions are not for the entire High 
speed audience, so I apologize 


I have a 4 gig ohm electrode/electrodes(s) ..... my electrode spacing is 0.230" 
and my socket has a 0.175" diameter / 4 layer

I haven't seen much lit on the subject - 

PCB material / voids / components / etch width to the 1 resistor into the opAmp 
/ given 0.060"  / slots req'd  

what does conformal coating do for me....

comments, pointers to white papers, etc are welcome.


Keith Kowal

www.product-designs.com
                            
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