1920.. The digital filter requires five conversions to fully settle. The
modulator has an oversampling ratio of 64, therefore, it
requires 5 • 64, or 320 modulator results, or clocks, to fully
settle. Since the modulator clock is derived from the system
clock (CLK) (modulator clock = CLK ‚ 6), the number of
system clocks required for the digital filter to fully settle is
5 • 64 • 6, or 1920 CLKs. This means that any significant
step change at the analog input requires five full conversions
to settle. However, if the step change at the analog input
occurs asynchronously to the DOUT/DRDY pulse, six con-
versions are required to ensure full settling.
Solo (29.12.2023 14:01, просмотров: 131) ответил Kpoк на Довелось мне как-то юзать ADS1253 от ТИ. Там у них чётко описано,
сколько времени проходит между переключением каналов и появлением
достоверного результата. Что-то под 1200 периодов тактового
генератора.