As shown in the figure, I use AD8656 as a two channel trans-impedance amplifier to achieve a current-voltage convert circuit. The problem is I find the chip is very ease to be damaged. I have use the multimeter to test the register between the negative input pin and output pin. Dose this action will damage the op-amp?
The power supply is 0 to 5v. When the AD8656 is "damaged", the output will up to power rail (5v), although the trans-impedance and the input current are very low.