What type of information do you have on calibrating a MEMS gyroscope?
What type of information do you have on calibrating a MEMS gyroscope?
Also, just so that you are aware, ADI offers discrete and fully-integrated gyroscope solutions. The ADXRS620 and ADXRS646 are examples of discrete MEMS gyroscopes that provide high-quality, analog outputs. The ADIS16265 and ADIS16136 are examples of fully-integrated, digital MEMS gyroscopes, which include unit-calibration that addresses bias and sensitivity errors, with respect to temperature and power supply. The following table offers some insights on the parameters that are impacted the most, by a factory-calibration process.
Parameter | ADXRS620 | ADIS16265 | ADXRS646 | ADIS16136 |
---|---|---|---|---|
Sensitivity Temperature Coefficient (ppm per degC) | ~258 | 25 | 387 | 35 |
Bias Temperature Coefficient (deg/sec per degC) | ~0.1 | 0.005 | 0.1 | 0.00125 |
NOTE: ADXRS620 and ADXRS646 numbers were calculated using typical parameters in their datasheets and under the assumption of a linear relationship across the temperature range. This was for comparison purposes only and does not imply a purely linear relationship between bias and temperature. We have found that there can be value in higher-order, polynomial fits for this relationship, along with observing behaviors at multiple temperatures.
Also, just so that you are aware, ADI offers discrete and fully-integrated gyroscope solutions. The ADXRS620 and ADXRS646 are examples of discrete MEMS gyroscopes that provide high-quality, analog outputs. The ADIS16265 and ADIS16136 are examples of fully-integrated, digital MEMS gyroscopes, which include unit-calibration that addresses bias and sensitivity errors, with respect to temperature and power supply. The following table offers some insights on the parameters that are impacted the most, by a factory-calibration process.
Parameter | ADXRS620 | ADIS16265 | ADXRS646 | ADIS16136 |
---|---|---|---|---|
Sensitivity Temperature Coefficient (ppm per degC) | ~258 | 25 | 387 | 35 |
Bias Temperature Coefficient (deg/sec per degC) | ~0.1 | 0.005 | 0.1 | 0.00125 |
NOTE: ADXRS620 and ADXRS646 numbers were calculated using typical parameters in their datasheets and under the assumption of a linear relationship across the temperature range. This was for comparison purposes only and does not imply a purely linear relationship between bias and temperature. We have found that there can be value in higher-order, polynomial fits for this relationship, along with observing behaviors at multiple temperatures.