Hi, P O.
The datasheet on the website only has 12 pages. Maybe you are referring to page 6 instead? To better assist you, please answer these several questions that i listed below.
- Does the -4.65 V seen even at start up? Or was it observed only after writing to the part?
- Is it consistent on that level (-4.65V) even though you tried to reset/power cycle the part?
- Do all the power supplies have the same ground reference?
- Have you tried replacing the part but still see the -4.65V on the reference out pin?
Regards,
Mark