I'm interested on switching a 300MHz signal with a very close power on each path. Are there data on relative loss (difference between channels)?
I have found some relevant data for you. Below is a plot of typical insertion loss at 25C for all 4 channels of the ADG904. Note these measurements were taken with a Vdd of 2.75V and again with 2.5V. This will give you a feeling for the variation you can potentially see between channels and for different supply voltages.
I don't have data at hand on channel to channel variation but let me check to see if it is available and get back to you.
Retrieving data ...