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ADG726 supply levels

Hi, I am trying to switch out a bunch of signals so I used the ADG726.  Unfortunately, the signals need over 2.5V but also below 0V so I couldn't go with either the 0V to 5V nor the -2.5V to 2.5V recommendations in the datasheet.  In order to achieve the switching requirements of both sides, I connected the VDD pins to +4V and the VSS to -1.42V.  Do you think this is an acceptable use case for this IC?  Also do you foresee any reliability issues due to connecting it in such a manner?  Thanks!