Adum4160 + ESD Protection

Question

Hi, 
 can I use the ESD Protection as per schematic on the ADuM4160? [It is to be on a peripheral] 
 PS- I do NOT want to use the PiC's VUSB in this case... 
 
 Thanks again! 
 PS: The process to get to this result is shown below:

ADIApproved · Accepted Answer

That looks more like it. 
 MSCantrell

ADIApproved · Answer

Hello Yachaan, 
 After seeing the entire thing, I have a couple of comments. 
 1) the protection is to stop ESD and EOS from the cable being applied to the chip. Please review whether the ESD protection should be referenced to the 5V line instead of the 3.3V line. The configuration shown would not protect the regulator. 
 2) the primary USB interface looks good, your PIC is a peripheral and the upstream side is powered from the cable. 
 I can't read the option section, what are you doing with the other isolation and connectors? 
 Good luck

ADIApproved · Answer

Hello Yachaan, 
 Yes, I think this is the correct connection for the protection devices. 
 The ADuM3440 is probably not the best part for limit switch application. This part is our highest speed coupler, and we eliminated the glitch filter in favor of high throughput. A lower cost solution would be the ADuM3400A which is slower, and has a glitch filter. One is a drop in replacement for the other. 
 Good luck.

Electronic Design Services - PartnerZone

Adum4160 + ESD Protection

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