Please let me ask following questions in regard to AD7791.
a) Datasheet shows CMR values on Table 1. Analog Input, but are these values specified under which mode of buffered/unbuffred ? Or CMR is not related to mode of buffer ?
b) If the answer of a) is unbuffered, could you please provide CMR value under buffered mode of operation ?
c) What is impedance value of differential input ?
d) Could you please provide bit sampling frequency of Σ-Δ modulator inside of AD7791 ?