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Any jellybean low current (<10mA) opto-mosfet or opto-ssr for signal routing ?
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Psi:
Are there any jellybean/cheap opto-mosfet or opto-ssr for isolated bi-directional signal routing?
Ideally multi-part-packages, like 4 per IC.



T3sl4co1l:
What signals?

SSRs are generally terrible for signals as the capacitance is high, and on/off ratio not impressive.

Without knowing what kind of signals, I would be inclined to answer "no", because they'll do poorly at line-level audio (poor isolation at upper frequencies), digital (something like SPI, the edges would bleed through too much, let alone anything "high speed"), high or low impedance (say, electrometer or thermocouple amp stuff?), etc.  Bonus points off for capacitance nonlinearity (more distortion in upper audio frequencies).  There may be some parts that do fine at some of these applications, but there does not exist (and cannot, not in Si anyway) a part that is universal for all of them.

If it's within supply rails, analog switches are fine, do check that you have adequate isolation for the application of course, but there are parts available with impressive specs (like <1dB insertion loss, >80dB isolation, at low GHz), if you really need it.  Even ye olde CD4066 etc. is fine for signals of modest impedance and bandwidth (100s to k ohms, low MHz), again, give or take how much performance you really need.

Tim
Psi:
Under 3kHz square wave.
Voltage will be above the 5V VCC. but no higher than 50V due to TVS clamp.
Switching speed is not an issue, this is just to configure some routing at startup based on what mode it should be in
MasterT:
https://www.arrow.com/en/products/smp-2a30-8dt/standex-meder-electronics
Psi:

--- Quote from: MasterT on February 25, 2024, 02:02:31 am ---https://www.arrow.com/en/products/smp-2a30-8dt/standex-meder-electronics

--- End quote ---

Thanks,
Strange there's such a large price difference for that, $3 on digikey vs $0.3 on Arrow.
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