I am planning to use AD7791 in an application, but I want to inquire about the impedance at the analog inputs of the chip.
What is the input impedance seen at the analog inputs when BUF is enabled and also when disabled?
We list the input current specification rather than specify the input impedance. The input impedance can be calculated from this input current specification. When buffer is enabled, the average input current is +/-1nA max. When buffer is disabled, the average input current is +/-400nA/V.