Hi all,
So, I want to put 10 pH/ORP probes onto a microcontroller, with each probe being galvanically isolated from its peers so that the measurements of different probes aren't interfering with each other. Being more of a digital than an analogue guy, I'm not really sure how to proceed...
Another requirement is that it's a small solution - there's not much space to play with here, about 0.5" x 1.5" per probe PCB... And of course, the cheaper the better, given that I want 10 of them!
One chip I found to do the isolation is the adum5241
current delivery (10mA).
So, questions:
- Do I need to isolate the -5v if the +5v and ground are isolated ? I'd think so, but better to ask :)
- Is there a better way to do it ? Bound to be - this is just the first one I've come across :)
Cheers Simon.