I was wondering what the power dissipation thru the device is.
This can be worked out from the ADG5408 datasheet.
Worst case conditions are +-16.5VDS = 33V = VDD to VSS.
IDD max (digital 0V or VDD) = 70uA. => P = V*I = 33V * 70uA = 2.31mW.
Let me know if this helps.
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