Discussion
Which parameter of a multiplexer's switch matters most for crosstalk?
Answer: A
Crosstalk is signal appearing where it should not, so the switch's isolation in the open state is what limits it. On-resistance affects amplitude accuracy and settling rather than isolation, current rating is a power consideration, and packaging is mechanical. Whenever a specification is about unwanted transfer rather than wanted transfer, the parameter to look up is the one describing the device's off state.
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