Does anyone know the input impedance of the ICL7107 chip using the standard setup in Figure 2 (page 4)? There's a 1MΩ resistor in series with one of the differential inputs, but not sure how to model this...
(I can't seem to find it on the spec sheet and I haven't found a good source for this online.)
(I can't seem to find it on the spec sheet and I haven't found a good source for this online.)