AD5620 or AD5640- Using Vfb to control the DAC output



Using the AD5620 or AD5640 with Vref=1.25v.

1- According to the datasheet Vref pin must be shorted with Vout and it gives a maximum output voltage of 2xVref with resolution of 2xVref/2^N.

Question: Is there a possibility of connecting Vfb to GND or unconnected or any other option for getting maximum output voltage of Vref with resolution of Vref/2^N?





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