Hi Rob,
I also noticed that the operation supply voltage of the AD4004 is +/- 5V to +/- 15V. Can you confirm that you're providing correct supply voltage and setup for the AD4004? Because if not, the problem might be on the AD4004 and not on the AD8235…
I am trying to design a ADA4084-2 into my latest design, but I am receiving strange results when I do noise modeling using the Spice circuit. The voltage noise at the output is extremely large, even with relatively small feedback resistor values. It almost…