I was trying to find the Dynamic range of the digital MEMS ADXL312. I am not sure how can it be calculated in dB scale without any reference point.
That rely isn't a common figure of merit for MEMS accelerometers, like is for A/D converters. What type of application are you considering this product for? How does this figure of merit help in that particular circumstance? Do you expect to be measuring vibration, which is focused around a particular frequency or is there another motion signature that you're trying to discern, where signal-to-noise ratio can be helpful to understand?
Thanks for the reply! I wanted to know the lowest frequency the sensor can detect, distinguished from the noise bed. This was not an application-specific question. I was comparing it to an analog sensor.
Which sensor are you comparing the ADXL312 to?
Just taking a quick stab at this, but MEMS accelerometers respond all of the way down to 0Hz. Are you trying to relate this to a velocity or displacement metric? If so, what velocity or displacement should I use to compute the lowest frequency with?
Just checking back in on this. If you are willing to share the other device you are considering, we will be happy to review and offer an genuine comparison, if the parameters have sufficient definition. If you are satisfied with what we have offered, can you mark one of the responses with the Correct Answer designation? If we have not met all of your needs, we look forward to your next reply.
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