onsdag den 13. december 2023 kl. 21.23.40 UTC+1 skrev John Larkin:
I might use an LED+mosfet type SSR to switch a voltage divider at the
> input of an isolated ADC.
>
> The ON resistance of the switch is an error contributor, and a
> super-low Ron is expensive. 1 or 2 ohms is affordable.
>
> I'm thinking that driving the LED side from the proper Thevenin source
> might temperature compensate the ON resistance of the mosfets. Or even
> program the LED supply with a DAC.
>
> LT Spice dosn't seem to have any led-mosfet SSR models. I guess I'll
> have to try it.
TLP3905 or similar and two low Ron fets ?