The datasheet says the output voltage is referenced to the AGND-OUT (datasheet page 4). But according the output voltage formula (datasheet page 23), the voltage is referenced to VREFN. How is the internal connection of the AGND-OUT in the DAC11001A? Can you provide a simplified schematic?
Is it possible to drive the AGND-OUT with an opamp?
I have a multichannel system with one reference (VREFP=7V, VREFN=0V). According the datasheet the output voltage is referenced to AGND-OUT, but AGND-OUT should be the same potential as VREFN.
The idea is to buffer the VREFN voltage with an opamp and drive the AGND-OUT on each DAC to prevent crosstalks.
Thanks for your help.