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

[Mattias Rickardsson]

Does it have to be bidirectional?
Feels like this is the trickiest part to get around. :-)

/mr


Den tis 2 juli 2024 17:08Paul Glass-Steel via Synth-diy <
synth-diy at synth-diy.org> skrev:

> 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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