Thank you for all the information here. I am not sure, that I read and understood all of it. I have read the datasheet of the MT6835 and got two issues with questions:
It seems that the sensor got some moving average filter function, and it is set by a programable BW parameter (see page 37 in datasheet). The factory default setting is 5.
How do the sensor actually do this filtering in more specific terms?
How is the filter changed by the BW parameter?
I read this other thread with some MT6835 information:
It seems that BW=5 cause a 2 ms latency, but it is not specific.
Another question is about how the sensor work. The AMS sensor like AS5047 got an internal clock with a cycle time between 90 and 110 us. So in a cycle the internal hall sensors output are sampled, ADC takes place, and calculations take place. When you issue the SPI command, the latest calculated angle or filtered angle can be read.
I guess that the MT6835 works in a similar way - do you agree?
What is the cycle time of the MT6835?
Are you able to synchronize your SPI-reading to its internal cycle?