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What does it mean factory calibration for a accelerometer as LSM303 ?

Question asked by tual.jerome on Mar 14, 2018
Latest reply on Mar 19, 2018 by tual.jerome

Hello,

We used the LSM303D and now we use the LSM303AGR for a roll and pitch sensor (+/-45°C).

The LSM303 components are factory calibrated (cf. datasheet of the LSM303D, DocID023312 Rev 2) :

"The IC interface is factory calibrated. The trim values are stored inside the device in
nonvolatile memory. Anytime the device is turned on, the trimming parameters are
downloaded into the registers to be used during normal operation. This allows the user to
use the device without further calibration."

Could you me give more details about it ?
For the LSM303AGR, there are more details :

"The IC interface is factory calibrated for sensitivity (LA_So, M_GN), Zero-g level (LA_TyOff) and Zero-gauss level (M_TyOff). The trim values are stored inside the device in nonvolatile memory. Anytime the device is turned on, the trim parameters are downloaded into the registers to be used during active operation. This allows using the device without further calibration."

The specification of our roll and picth appplication must be have an +/- 0,5°accuracy in a +/-30° scale and an +/- 1° accuracy for +/- 45°.

With the LSM303AGR, do we need to do a calibration like indicated by the DT0053 Design tip ?

Thanks,

Jérôme.

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