I have an analog board from a Keithley 238 SMU. I'm wondering if is possible to make a complete unit with it? What do you think? As far as I can see all the trick is done on this PCB, just need to build a power supply and a digital control.
Unfortunately I have no schematic for the 238.
I don't necessarily like to build an exact clone, I just need a basic SMU with 1uA-1A current range, and 1mV-100V voltage range.
In the 236's schematic, there are two AD7538 and one MP7543 DACs. I don't see any dedicated ADC, it seems to be a custom built ADC with discreate components partly on the Digital Board PCB.