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CN-0357, TIA input-bias current importance.

Question asked by zoulzubazz on Feb 3, 2016
Latest reply on Feb 3, 2016 by Brandon



I am reading your circuit not CN-0357. From an analog perspective, the bias current of the opamp will add to the sensor current going the TIA. Is there any reason why this is not discussed in the CN. In some cases the sensor current can be as low as 4nA and the bias current is a large proportion of the total current flowing into the TIA.