with no impact or moving, adxl372 reads -15~15 [100mg] accelation range.
it’s about 1.5g, and i think it is big.
is this normal range?
and with just 1cm drop of pcb, the max peak reads 1300 [100mg].
i am confused if it is right value.
how can i sure the sensor output value is right?
Thanks for the question. Based on the RMS noise spec, the peak to peak noise of this device may go up to 2g, plus the initial offset, the number seems normal to me. If you don't care about the DC offset and gravity signal, you can also turn on the HPF to only monitor the AC impact signal.
I hope this helps.