[sdiy] Best way to limit current through an analog switch IC?

[Paul Glass-Steel]

Hello all,

I'm working up a bi-directional switch module around the TI MUX507 analog
switch IC. The datasheet lists the maximum IO current as 30mA. I'd like to
proof the switch against the fault condition of having the IO spanning
my +/- 12V rails, however remote that mis-connection might be.

By Ohm's law, the bulk series resistor needed would be 820R 1W, rounding to
common values. I imagine that resistance would be high enough to audibly
affect pitch CV. Is there a better or more elegant solution to limit the
current?

Thanks,
-Paul
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