Hi Fazlul,

Our ADG5204 is a newer part and is a good part with low charge injection and capacitance values. Also it is latch up proof so I would say go with this one.  But note it has an Ron in the region of 160 typical.  It sounds like low capacitance…

Hi imanjohn,

Have you any more details on what the fault is that is damaging the part? Is it a positive or negative over voltage condition?

I have attached a tutorial which outlines protection methods to be used. You have implemented one of them but…

Hi, wivern.

I have few suggestions that you may consider for your design.

1. Your 50ohms resistor is too low to be a load of your in amp. This will dissipate a lot of power. It would be better if you increase the resistance and reduce the 1uF capacitor…