I am looking for a accelerometer to detect 20mg changes (<5$). No concern about power consumption or package size.
The goal is to detect very small movements.
Have you any solution to propose ?
For this particular application, I would check out the ADXL362. On page 15, the ADXL362 Datasheet (Rev 0) describes several key functions that may help you in developing this function. The sample rate, filtering and noise settings give you a chance to optimize the responsiveness of your system, while managing the risk of false triggers. I hope that helps! If this does answer your question, our system administrators would greatly appreciate you marking the Correct Answer for this.
There are a number of options but further definition of the motion and detection strategy might help us narrow this down a bit more.
The application is like a theft detection. This changes from 0 to 20 mg can be done by human movments. The response time is not critical and 400 ms is good enough.
Regarding the accuracy, this is not so critical as we do not want really to measure something but more to detect a movement.
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