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AD7791, a few questions


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 ?

Best Regards,