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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

Freescale:

 

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...

 

Thanks

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