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...