Там фильтры долгие. The output data rate from the parts is
software-programmable and can be varied from 4.17 Hz to 470 Hz.,
так что оцифровывать 1 кГц им не дюже When the
update rate is from 4.17 Hz to 12.5 Hz, a Sinc3 filter, along with
an averaging filter, is used. When the update rate is from
16.7 Hz to 39 Hz, a modified Sinc3 filter is used. This filter
provides simultaneous 50 Hz/60 Hz rejection when the update
rate equals 16.7 Hz. A Sinc4 filter is used when the update rate
is from 50 Hz to 242 Hz. Finally, an integrate-only filter is used
when the update rate equals 470 Hz.