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AD7173-8 connections for internal reference

Question asked by naholten on Dec 4, 2014
Latest reply on Dec 8, 2014 by jtee



I am designing with a AD7173-8 and I want to use the internal reference.

I have decoupled the REFOUT pin with a 100n cap as described.


The data sheet does not say anything about the REF- and REF+ pins when using internal reference.

Should the REF- be connected to GND?

And should the REF+ be left floating?


In addition I intend to use the internal oscillator so I will leave XTAL1+XTAL2 floating. Hope this is ok also.


I attached my preliminary schematic for the AD7173-8.


Comments are appreciated.


Thank you,