Old question, but I have several examples of ACF being used in a plugin. Most of the plugins I build use ACF for admin pages. https://github.com/Hube2. This one specifically uses options pages with tabbed layouts, others may also, but off the top of my head I know that this one does https://github.com/Hube2/ssi-standard-features
I know it’s an old question, but this may help someone and I get to post a shameless plug 🙂
