What is difference between ADG904 and ADG904-R evaluation boards?
The physical pcbs are the same but the key difference is the ADG904 Evaluation board has the ADG904 (Absorptive, 50ohm shunt) switch on it while the ADG904-R evaluation board has the ADG904-R (reflective, short circuit shunt) part on it.
Thank you for your inquiry, however you have asked your question in the How to Use EngineerZone space. This is not a product support forum. I am moving your question to the correct support forum: Switches/Multiplexers
You may find the Eval board data sheets here: http://www.analog.com/media/en/technical-documentation/evaluation-documentation/EVAL-ADG904_904-R.pdf
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