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How is the output of AMP04 is referenced when I use the "REF" pin for offset adjusting?

Question asked by npanagio on Sep 16, 2016
Latest reply on Oct 3, 2016 by Emman.A

I am using AMP04 for measuring thermocouple signals. The voltage supply provided is +9V (pin 7 to +9V, pin 4 to ground). In order to do offset adjustments I use a DAC (MCP4921) connected to pin 5 (REF pin). My enquiry is, do I measure the output voltage referenced to REF pin or ground? It is not clear for me from the datasheet info. At the attachment you may have a part of the whole circuit.

 

Thanks for your time and support.

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