ADM1166 Sequencing differential voltage query (SR#: 1239446)

Q

can the SFD block be improve in terms of accuracy wrt external ref.

Does an external voltage reference affects the SFD?
When Ultra Low Range is used, what is the maximum Absolute Unaccuracy in mV?

A

For ADM1166, the REFIN reference input only affect the ADC full range and ADC
readback accuracy.

The SFD comparators relies on internal reference and the accuracy cannot be
imported by more accurate external reference.