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AD8656: damaged by unknown reason

Question asked by 朱煦然 on Sep 26, 2016
Latest reply on Oct 6, 2016 by 朱煦然

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.

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