AnsweredAssumed Answered

AD7766 Vdrive Abs Max 6V?

Question asked by SouthPacific on Nov 1, 2017
Latest reply on Nov 6, 2017 by jcolao

On page 8-of-24 of theAD7766 Rev C data sheet, it states the Vdrive to DGND pin has an absolute maximum voltage of +6V.

On page 9-of-24, against the Vdrive pin (and throughout the document), it states the Logic Power Supply Input 1.8V to 3.6V - determines the operating voltage of the Digital Interface.

You might think that the Abs Max voltage might be 3.6V in that case - but it says 6V.

 

I have a 5V logic system and am hoping to not require Level Translators on the Input and Output signals. Two extra ICs are required.

 

If the Digital Logic Interface could handle 5-volt logic levels, the data sheet would stress it as a great feature. But it doesn't.

 

What happens if the Vdrive pin is set to 5-volts? It shouldn't damage the part as it is within the absolute maximum value.

 

Would it allow 5V logic levels?

 

Might it allow 5-volt tolerant inputs - but still 3.6V logic level outputs?

 

Thanks

Outcomes