AnsweredAssumed Answered

AD8626 voltage noise issue

Question asked by starraytheon on Dec 8, 2014
Latest reply on Dec 10, 2014 by krisf

Hi Experts,


I am testing a circuit that TIA pre-amp used AD8626.


I used Fig45 of spec page15 topology, and 2 OP are used.


I used same opto-diodes in the -INA and -INB inputs.


As I thought, the voltage noise of 2 OP should be same.


But the test shown the noises are different, how about is it?


Is the same bias circuit used for 2 OP core, the interference is generated?


Thanks for your support!