Jump to content
43oh

Protecting inputs from high voltage


Recommended Posts

I should have added Analog inputs. Imaging your working with a breadboard connecting jumpers with mV analog inputs but also have some high voltage stuff around. You don't want to fry your Launchpad when a stray wire touches the wrong voltage. Maybe a zener diode and fast blow fuse?

Link to post
Share on other sites

You could potentially add some clamp diodes between the analog input and the two supply rails. We do this on the larger controlCARDs but space was limited so we omitted these on the LaunchPad. The part we use on the F2802x controlCARD is NUP4201MR6:

http://www.onsemi.com/PowerSolutions/product.do?id=NUP4201MR6

 

These will stand up to a little abuse, but they are really designed to protect the pins from ESD. If you put 50 volts on one of the LaunchPad pins you WILL fry the board.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...