I had measure the Iout, but the result was not the same as I thought.
Can you help to check the schematic is correctly or not.
What are you expecting vs what are you getting?
I input data from 0000 to FFFF, I should get linear output voltage from 0V to maybe 5V.
But the output voltage is negative from -1V to -1.5V.
What span codes are you using?