LSM6DSR ODR not accuracy

[Pqing.1]

Hi.i am using LMS6DSR ,and use ODR is 208Hz,but,i found that i can't get 208 samples at 1 secend.and,i had confirmed that it only about 203 Hz from Interrupt signal.so,i want to know is that normal? i can't find information about error of ODR in datasheet.

[Eleon BORLINI · Accepted solution]

Hi @Pqing.1​ ,

please note that usually, on the datasheets, the ODR is defined only at its typical value, in this case 208Hz.

I can share with you a distribution of the ODR 208Hz on a representative validation sample: if you need a precise characterization of the ODR, you should measure it sample by sample (e.g. counting the DRDY signal). I can tell you that the jitter (i.e. the repeatability of the ODR for each single device) is much less than the spread among ODR actual values.

 

If my reply answered your question, please click on Select as Best at the bottom of this post. This will help other users with the same issue to find the answer faster. 

-Eleon

[Pqing.1]

Ok,thanks for your answer, i have a question about typical value is that why select 208Hz why not mean or 3 sigma?

[Eleon BORLINI]

well, it's a typical value coming from the internal clock tree downsampling, and it could vary among samples and lots (but constant on same sample).

-Eleon