Question
Did the variant AD9101ARZ (Pb-free?) exist?
Else if AD9101AR is obsolete, what is recommended replacement(s)?
Answer
Even not in the Datasheet - there was an AD9101ARZ, AD9101ARZ-Reel in SAP.
Meaning Analog Devices sold lead free versions (RoHS compliant) of the AD9101.
There is no replacement for the AD9101.