Hi,
I don´t think Optotriacs are a good solution because they need some holding_current. More than your couple of mA.
I think about
* solid state MOSFET AC relays. PhotoMOS, like AQY214 ... check specification.
* REED relays for low currents high voltage.
You should specify
* max acceptable leakage current on OPEN contacts
* max acceptable isolation leakage current
* switching time and bouncing time
* max acceptable ON sate resistance
* control voltage
* max acceptable control current
...
Klaus
Thank you Klaus for your feedback.
It is a calibration rig as well, so the leakage current when the *Switch* is of will disturb the other cases ( for example case one : 200Vac, and case 2 : 15VDC. So any possible leakage current shouldnt be significant to disturb the calibration results).
I tried to simulate something like Vishay VO302 (with a leakage off stage current of 10nA) it did the job when used alone. but when trying to simulate the other cases. not so much.
As for the PhotoMos SSR, they should work, but the minimum leaked current that I could find was 1uA ( which should be my on value and not Off)
The REED relays, from I've seen doesn't specify the leakage current, not a minimum load current. but they are a bit expensive (especially if I'm using 10 of them in the same board)
For the specs :
- What is the difference between the first two ? isolation leakage current and Open contact leakage current ? The leakage should insignificant compared to the operational current of 1uA. if not I don't think there would be a difference between Open and close at this point.
- The timing is not an issue, as I can adapt to it and take into account the Turn On/Off durations in my different case.
- Control voltage shouldn't be a problem, as I have 3.6/5/10/12/15.
- Control current would be taken into account in the power tree of the control voltage source.