I have some questions about ADXL345 sensitivity.
According to the datasheet,
sensitivity is specified :Min:3.5mg/LSB, Typ:3.9mg/LSB, Max:4.3mg/LSB(And it has about 10% errors from typ value)
and the Figure 16 shows the X-Aix Sensitivity at 25 degree, and the value could be up to 3% changes.
So my questions are following:
#1, I believe Min/Max sensitivity values include temp variation over the operating temp. Am I correct?(I'm asking this just in case)
#2, Temp change is only ±0.01%/degree, so if the temp change 100 degree, it is only 1% error.
But sensitive Min/Max 10% errors looks bigger than the mix of temp error(1%) and initial erro(3% ) from fig16.
Is there any error factor is included? or Inital sensitive erro could be bigger than Figre 16?
Thanks for the question. The min/max sensitivity 10% error is the factory calibration/trim error at 25 degreeC. For a single part, it's a fixed value. And you are right, the sensitivity temperature coefficient is ±0.01%/degree which can result in about 1% shift across the 100 degree change.