Part Number:LMX8410L
I have two separate ADCs, one for I and one for Q. They each have a common mode output. The LMX8410 only has a single common mode input VCM_IN pin 36. It would have been better if the part had a VCM pin for I and one for Q. Maybe I can combine these for a single input to the LMX8410. What is the impedance of the VCM_IN pin? What is your recommendation for dealing with two common mode inputs from the ADCs? I could go with the eval design and just use a resistive divider off of the 5V supply. I also see the common mode can be supplied externally or internally. How is the internal mode implemented?