Do you have any data on the current noise spectral density for the ADA4610-2? I've looked at numerous data sheets that indicate measurements are made on other opamps even at very low levels. Just for a sampling, the AD8067 lists 0.6 fA in its datasheet and the ADA4530-1 even lists a value of 0.07 fA.
A plot of the current noise density would be great, but even just a number at a given frequency would be helpful.
Thanks very much,