LTC7001-Noise voltage

Hi all, I am using LTC7001 with N channel mosfet.While everything is okey, The LTC7001 sometimes does not work and probobly it breaks.I change the LTC7001 with new one but after a while it that is changed breaks.I searched that why it does not work but I couldnt find a reason. I think that it breaks because of high noise voltage signal but I dont know because of this reason.In my working zone has noise voltage that is between 1 and 3 volt.Does this noise voltage cause like this breaking ? if I give noise voltage to ground line of LTC7001, will it break ? do anyone have an idea or know about this subject  ? 

thanks,

Bulent

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