I have noisy ADXL001 - I am wondering if this is correct output
The part is noisy.
to calculate to noise:
take the noise density: 3,3 mg/sqrtHz - datasheet (70g Version - see datasheet
(3,3mg/sqrtHz*sqrt(22000*1.3) = 558mg Noise
1.3= correction factor as the low pass filter is not ideal
558mg equal to 8,9 mV Noise