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Originally Posted by velocipenguin
Any of you who are using the ADXRS150EB should keep in mind that sampling faster than 40 Hz is useless. According to the ADXRS150EB datasheet, the evaluation board contains components that set the bandwidth to 40 Hz. Sampling more frequently won't do you any good and increases the likelihood that you'll sample and integrate random electromagnetic interference.
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Kevin Watson already posted an explaination above. If the bandwidth is 40Hz, then to measure it you need to do it at least twice as fast. For the ADXRS150EB stock you'd want to sample at not less than 80Hz.