Power supply for ADG451/452

Good morning,

I have a question regarding the IC ADG451/452 and the power supply required for its functioning. Is it possible to run it from a +9 V analog supply? And from a +5 V? I read in the datasheet that the IC should be functional as long as the supply is equal or higher than the 5 V logic supply, but when I used the LT Spice model  and simulated it, it works only with a supply of 12 V.

Thank you,

Alessandro