In an application I'm using the ADIS16210 as an inclinometer. The accuracy is good. The noise is approx. 0.02 degrees (3 to 4 datapoints) which comes close to what I need for the application. This noise is measured over 15 samples with a sample count of 2048(AVG_CNT = 0x000B).
However, The application requires low power consumption so I set the ADIS16210 in power_down mode when I'm done with the measurement. A few minutes later, I bootup the sensor and do another measurement. Again 15 samples with a sample count of 2048.
Now here's what I find strange. The 15 samples are more or less the same value given the noise factor. But there is a significant difference between the different measurements! This difference can be up to over 20 datapoints.
So, when I put the sensor into Power-Down mode and then power-up the sensor again, the measurement of the axes can be off by 20 datapoints. If I don't power_down the sensor, the meaasurement of the axes stays within noise range.
Can anybody tell me how I might resolve this problem?