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Clarification of datasheet noise specification for MMA8452Q accelerometer

Question asked by Dylan Pfeifer on May 14, 2015
Latest reply on May 15, 2015 by Jose Alberto Reyes Morales



Can you guys clarify the specification for noise in your MMA8452Q datasheet?  It says 99 micro-g per root Hz.  Where are you getting the bandwidth root Hz from?  The sheet says the bandwidth of the accelerometer is min ODR/3 and max ODR/2.  Assuming ODR is set to 100Hz, this would seem to indicate to me the bandwith is ~25 Hz?  Or is the bandwidth in the root Hz taken from something else?


We are trying to estimate the lowest measureable acceleration without noise in the 12 bit part...