Hallo Russell,

first, let me thank you for your very detailed and informative reply!

Well, that's just that sort of information a customer wants to have in the datasheet!!
And the whole confusion about the ENOB is caused, because in datasheet there's absolutely no information about the actual definition of ENOB!

Ok, I conclude:

MCS1210 gives lower noise level compared to ADuC824. But if compared to AD7730, while having the 'Buffer ON', noise performance of AD7730 (155nVeff) is still better than that of MCS1210 (255nV...298nVeff).

Thanks again, and nice to have you here!

Kai