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using the  AD5791 with varying reference voltages.

Question asked by Jorge on Jul 12, 2011
Latest reply on Jul 13, 2011 by LiamR

I would like to set up a AD5791 circuit with +/- 15 V supplies and VREFN to gnd.

I then want to change the VREFP in 500mV steps from 1.25V to 5V, keeping the DAC input code constant (say mid scale).

Will the analog output of the AD5791 scale similarly?

 

For example for the VREFP inputs in the table below what kind of error (LSB) would I see in the analog output of the DAC:

 

VREFPANALOG OUT
1.25V0.625V
2.0V1.0V
4.0V2.0V
5V2.5V

 

 

Your assistance in this matter is greatly appreciated.

 

Thanks,

 

Jorge

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