Input Impedance

Hi Richard,

You can see that the input bias current is in the pA range, so it usually means very high input impedance. However, due to the autozero feature the input signals are loaded by periodic current spikes. Therefore, the source impadance should be kept low. See the Clock Feedthrough, Input Bias Current section in the datasheet. This may be the reason for the missing specification, I think this kind of load should be considered instead.

Best wishes, Zoltan

Hi Richard,

You can see that the input bias current is in the pA range, so it usually means very high input impedance. However, due to the autozero feature the input signals are loaded by periodic current spikes. Therefore, the source impadance should be kept low. See the Clock Feedthrough, Input Bias Current section in the datasheet. This may be the reason for the missing specification, I think this kind of load should be considered instead.

Best wishes, Zoltan