Hi,
I'm working on using the ADG707A Multiplexer with the AD595 Thermocouple amplifier to build a thermocouple multiplexer. I am basing it off of the thermocouple multiplexer in the application notes (AN-369). I notice that you suggest permanently enabling the multiplexer with a +5V input to prevent the AD595 from being left floating.
From what I can tell in the data sheet, the enable pin is limited to VDD+2V and 20mA. Does this mean it would be okay to use VDD(+12V) with a current limiting resister to hold the enable pin high?
We are using +/-12V input rails to power the ICs and it would be really nifty to use +12V rail to hold enable the multiplexer instead of creating a +5V supply just for the enable pin.
Thanks,
Ben
Hi Ben,
Sorry about the delay in replying.
Yes, you should be able to use 12V on the enable pin to enable the ADG507A.
Regards,
Stephen