Isolated Voltage Measurement
Check the power rating of the voltage divider resistors and check if it's getting hot.
With the resistor divider values you are using, Vin (across R2) would be 9.184 V and your device can only take up to 2 V max (no wonder the device is blowing up).
Use this link for calculation: http://www.ohmslawcalculator.com/voltage-divider-calculator
Check again with R1 = 200 kΩ and R2 = 8 kΩ


Hope this solves your issue.