digital +5V used as ext ref on APFI 0 stability

[bonnerupc]

Anyone used the digital 5V on a multifunction board (PCI-6259) to ext ref the A/O?  My main concern is stability of voltage and AO / Dig ground violation.

Thanks all.

Chris

[Dustin_D · Accepted solution]

Hi Chris,

In the manual it states that:

You can use one of the AO <0..3> signals to be the AO reference for a

different AO signal. However, you must externally connect this channel to

APFI 0 or APFI 1.

If you're looking to have programmatic control over your reference this would be a better option.  Will that be an option for your application?

Regards, 

[bonnerupc]

Thanks Dustin,

That solution will work nicely.  Darn 'pesky' manuals; seem to always have an answer in there somewhere.

I'll have to use one of the four AO's of course, but se'la'vie'.

Appreciate your feedback.

Chris