We need to switch a single attenuated ADC between a number of high=20
voltage (+/-1Kv) sources. Some kind of solid state relay or multiplexer=20
appears to be necessary. The switching element would only need to pass=20
well below 1mA.

Can anyone here suggest such a semiconductor device that would withstand=20
+/-1kv, at load currents well below 1mA? Ideally PCB mounted, as small=20
as possible, and controllable by TTL logic levels.

I've been avoiding using reed relays so far, for fear of them wearing=20
out prematurely (looks like they may last for around 10 million or so=20
cycles). However if nothing solid state can beat them, then I may employ=20
them and assert that they only be operated sparingly!

Don't flame me if I've overlooked the obvious...

Best regards,
Matt
--=20
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