Question re: ADUM7442ARQZ-RL7 (or 242D)
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- ‘LINE’ refers to physical wires between PCBs
- 1st PCB supplies power & ground to 2nd PCB over 4-conductor cable: Pwr, Gnd, Tx & Rx.
- Line lengths <100m
- Speeds < 230Kb
Main purpose is data line protection
(1) Is it ok to use same supply & ground for both (isolated) sides of a single iCoupler device?
For PCBs, we normally use Optocouplers for data line isolation.
We found iCoupler tech as an alternative. Problem is all references only show two separate & isolated power supplies. We need to isolate/protect data channels only. Can Vdd1 be tied to Vdd2 and Gnd1 tied to Gnd2, where Vdd ranges 3-5VDC? Does that, in any way compromise the protection of the data lines? We are focused on this need to isolate two data lines:
(2) A second development effort requires data line level shifting - we HAVE found this sample circuitry, but again, none with the grounds tied together between the two PCBs. Is that okay?
Hope these are easy & quick for you!