LIS2DH12 - the frequency tolerance of data rate (ODR)?

[Morrigan Aensland]

Posted on June 08, 2017 at 11:05

Hello,

I set the data rate (ODR) to 400Hz in high resolution mode with fifo stream mode enable of LIS2SH12.

For 3 minutes measurement test, I excepted to receive 72000 (400 * 60 * 3) data for each axis, however I only received around 68220 number of data, which the data rate is around 379Hz (~5% tolerance).

I also tested with two other LIS2DH12 samples, one is 378Hz, and the other one is 399Hz.

Therefore I suppose the data rate has tolerance with it.

Myy question are:

1 Since the data sheet only provide the 

'typical' value, any application note describe the tolerance of data rate?

2 Is it possible to calibrate the data rate with register setting?

Thank you very much.

#lis2dh12 #odr #fifo #data-rate

[Miroslav BATEK]

Posted on June 12, 2017 at 14:54

Unfortunately the tolerance of data rate is not guaranteed and not described in the datasheet and it is not possible to calibrate the data rate.

The value 5% which you measured seems possible to me.

If you need to know the exact output put data rate you can measure it by a microcontroler using data ready interrupt signal.