Accelerometer MMA8451Q

[leiflundberg]

Hi, I am using the MMA8451Q accelerometer in an application with quite  small accelerations thus having problems with the internal noise level (low s/n ratio).

Would the noise level vary between sensor specimens so that I could try to screen out good ones from a lot? Other ways to cope with the internal noise?

Thnxs for feedback, Leif

[TomasVaverka]

Hi Leif,

For the best noise performance, it is recommended to select the lowest possible ODR, set the ±2g range and use both Low Noise (LNOISE bit = 1) and High Resolution (MODS [1:0] = 0b10) modes. For more information please refer to our AN4075.

Hope it helps.

Regards,

Tomas

PS: If my answer helps to solve your question, please mark it as "Correct". Thank you.

[leiflundberg]

Hi and thanks for your reply. What you describe is as we do it currently, but we would need som less noise to be on the "safe" side. If we would screen out a couple of sensors from a group of 10-20, would we find any with somewhat better performance or are all much the same?

Leif