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?
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.
thanks for the quick response.
what you recommend as a differential DAC driver for the AD9122 working at about 0-150MHz band width?
You can look at ADA4899 and ADA4841. One is a unity gain buffer. The other is an op amp.
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