ISM330 how is INTERNAL_FREQ_FINE set?

[BrandonM]

Hello,

How is the INTERNAL_FREQ_FINE register set in the ISM330?

Is it factory calibrated or is there on board logic that allows it change with age/temp/etc.?

Thank you,

Brandon M

[BrandonM]

Update : I found a post from Wellett "IIS3DWB - ODR Accuracy" where the same question is asked relating to the IIS3DWB. The response from Federica Bossi says it is set at the factory.

I presume this would be similar for the ISM330.

If this is the case, then since INTERNAL_FREQ_FINE is only set once, that means it does not change with temperature or age of the device.

Presuming 25 Celsius is the measurement point for the standard (based on Federica's response), the accuracy can be +/- 0.5% at 85 C and +/- 0.65% at -40 C.

[Federica Bossi · Accepted solution]

Hi @BrandonM ,

I confirm you that also for ISM330 the INTERNAL_FREQ_FINE is factory calibrated.

[BrandonM]

Thank you