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ADG507A Max Enable Voltage

Question asked by Bendr on Apr 19, 2016
Latest reply on May 6, 2016 by Stephen_Nugent

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

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