I have many test points on a board, a small DAQ, and an SMU that I can program with LabView. Depending on the test, I need to change which test point the SMU is sending/measuring voltage or current.
To do this, I figured I should use a series of analog switches, and control the switch paths by using the DAQ's few outputs. (Eg. Outputting the high/low binary
000 sends the signal to the first test point
001 routes the SMU to
However, some of the tests I'm automating require sourcing/sinking up to 500mA of current from the SMU to the test point, and most switches advertise their "high-current capacity" of 150mA or so. Additionally, my SMU signal reaches a maximum of 20V at times, so it needs to be able to handle both.
I find it hard to believe that there isn't a switch that can do what I need, so what should I be searching for?
Is this usually how this kind of task is accomplished, or is there an alternative to switches that would be better?