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AD825x Supply Rails

Question asked by Igor_M on Sep 23, 2015
Latest reply on Oct 5, 2015 by JGunao

Hi,

 

I am looking into using the AD8250,AD8251 or AD8253 devices in a design and I have a few questions.

 

The AD8250/1 will be used to measure a voltage from 0-28V. I plan to supply the device with -1.8V/+32V supplies such that the output can be referenced to ground.

 

Will these devices work with such a supply range? I noticed in the spice model that the /WR input needs to be below -3V for the flip flops. I think this was causing convergence issues with the model. I wonder if this will be a limitation in the real circuit as well?

 

Are these 3 devices similar in this respect?

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