Battery measuring by AMP03 then muxing to NI A/D


I designed system thats monitoring batteries discharging.

There are a lot of batteries sampled by AMP03 (Unity gain, diff. amp) then transfered via 2 analog 32-1 MUX (ADG732) and analog MUX 2-1 (ADG1219) and finally driven through the another unity gain amp to NI A/D in the PC.

After some months of working the battery sample amps started to burn up at random order.

May I miss anything in the design, espessialy in AMP-MUX interface?


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