Signal Aquisition/Signal monitoring
Signal Aquisition/Signal monitoring
(OP)
I am curious if anyone has any good ideas where I can get a "high voltage" input analog multiplexer/demultiplexer. Preferably the device would be 16:1 (I could live with 8:1). I am looking for a voltage input range of 0 to 100VDC. Thus far it has been a quest for the holy grail.
Any input would be most appreciated.
Thank you.
Any input would be most appreciated.
Thank you.





RE: Signal Aquisition/Signal monitoring
RE: Signal Aquisition/Signal monitoring
Resolution. I don't quite understand what you mean.
As far as the signal integrity through the MUX, it is not a big concern. The smallest voltage I will probably see is about 1-5VDC. It is the larger voltages I am concerned about.
RE: Signal Aquisition/Signal monitoring
RE: Signal Aquisition/Signal monitoring
> scaling, as mentioned above
> relays
> DIY mux using high voltage Mosfets
TTFN
RE: Signal Aquisition/Signal monitoring
RE: Signal Aquisition/Signal monitoring
I have thought about all you have proposed.
Of course in the real world, we have to think about cost.
I should have mentioned earlier that my goal was to measure 128 channels. 16:1 or 8:1 MUX/DEMUX would work as cascading them together but I needed the advice on the "seed". Imagine scaling down the 128 lines before it got to the MUX/DEMUX. That is a lot of components if I were to multiply by 128. : )
Photo-MOSFET relays are a god send but they are expensive, not only in cost, but real estate on a PCB.
Thank you for all your thoughts.
If you think of anything more please contact ASAP!
RE: Signal Aquisition/Signal monitoring
If this is something that's worth doing, then your customer will have to pay the price to get what he wants.
Your best choice will still probably be relays, something like what Keithley has:
http://www.keithley.com/storefront/ps.catalog:productallitemlist?section=Switching%20and%20Control&clickPath=Products^Switching%20and%20Control
TTFN
RE: Signal Aquisition/Signal monitoring
RE: Signal Aquisition/Signal monitoring