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LM2232 Failure

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I'm using a LM2232 as a buffer to monitor 2 28vdc signals. The device has failed and with no input 1 channel has 1.5v on the output and the other channel has 0.13v.

Both circuits consists on a 10:1 voltage divider (88.7k and 10k) feeding the input, with the device configured as a voltage follower and it's output going to an ADC input of a MCU. Vdd = 3.3v

Question is what could have caused this failure and how do I protect against it?


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