I am using the CN0349 as a fully "isolated" conductivity sensor for seawater. Interfacing with the part is fine and it's data output is fine.
However, it causes huge amount of interference (RF?) with other devices on my master PCB board. It can successfully jam my GPS and cause a large reduction in signal quality for my LTE modem. It is apparent because removing it from the header shows a spike in signal quality. Are there any suggestions on how to shield this part from interfering with the rest of the board without turning it off when my gps or modem needs to be used?
The most likely culprit here for your RF interference is the ADuM isolator parts. There are techniques on how to handle this, and thankfully someone wrote them up in a nice little app note…
Does your end application require isolation? If not, then the ADuM parts aren't necessary. If you hadn't thought about isolation before, then the answer is probably that you don't need them.…
Yes, that's the idea with the safety capacitor. If your system is in a sealed box, then it's unlikely that you need isolation.
Only other question that comes to mind is if the sensors…