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

[Ben Stuyts]

> On 3 Jul 2024, at 07:04, Roman via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> You could always use relays intead of a mux.
> CV friendly and pretty high current capacity.

Normally there would be almost no current flow at all, so make sure to use the right contact material for low current applications, i.e. gold plated.

Ben


> 
> Roman
> 
> 
> ---- Użytkownik Paul Glass-Steel via Synth-diy napisał ----
> 
> The switching function is ancillary to the module's primary function as a window comparator; if I have to choose between bidirectional or pitch-CV friendly, I'll take bidirectional. But, if I can have both at the cost of some complexity - it's middling-complex already, so what's a bit more, perhaps? 
> 
> On Tue, Jul 2, 2024 at 2:52 PM Mattias Rickardsson <mr at analogue.org <mailto:mr at analogue.org>> wrote:
>> 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 <mailto: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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