LIS2DW12 ODR clock accuracy

[Shrikrishna]

Hello,

We have integrated LIS2DW12 sensor in our application and configured it as per below configuration,

1. Mode: High performance mode
2. ODR = 200Hz
3. Sensitivity +/-2g
4. FIFO with 32 samples
5. INT2 interrupt for FIFO full

Our application requires 1% accuracy for sampling of the data. So I have below questions,

1. What is ODR clock accuracy?
2. How to measure ODR clock accuracy? Like measuring FIFO interrupt durations?
3. If we want to perform sampling in application as per DT0102, sensor needs to be configured for ODR 50. Does someone knows whether we can use higher ODR setting of 200Hz in single conversion mode?

Thanks

Shri

[Eleon BORLINI]

Hi @Shrikrishna​ , I try to answer to your questions here below:

• What is ODR clock accuracy?

Data from characterization show that the jitter / ODR clock accuracy is below 1%. I suggest you to always set the BDU bit of CTRL2 (21h) register, to avoid any dataout shift.

• How to measure ODR clock accuracy? Like measuring FIFO interrupt durations?

You can for example acquire the data ready signal on physical INT1 pad, enabling the INT1_ DRDY bit of CTRL4_INT1_PAD_CTRL (23h) register.

• If we want to perform sampling in application as per DT0102, sensor needs to be configured for ODR 50. Does someone knows whether we can use higher ODR setting of 200Hz in single conversion mode?

50Hz ODR is recommended, but higher ODR (for example 200Hz) is OK as well.

Regards