I'm looking for a way to interface the AD9122 dac with differential amplifier like the ADA4927-1
am I doing it right?
what should I do with the VCM?
The AD9122 is a dual 16-bit, high dynamic range, digital-to-analog converter (DAC) that provides a sample rate of 1230 MSPS, permitting a multicarrier...
AD9122 on Analog.com
Please note that ADA4927 is an ADC driver. It may not be the best output driver for a DAC. But if this is what you have selected, you can treat the AD9122 output as an ideal current source and terminate it with a 50Ohm resistor to gnd on each leg. You would want to refer to the reference circuit in the ADA4927 data sheet or go to the high speed amplifier community for the rest of the design.