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ADXL001 delay


I am measuring vibration in the range from 100Hz to 1kH using the ADXL001 500. I am comparing my results with displacement data. The amplitude of both signals are perfectly coherent but there is what seems to be a constant trend in the angle between them, which I think is produced by a time delay in one of the signals.

I have not used any data filter for the accelerometer but the output is directly connected (really close to the chip) through a 1nF to ground.

I am using a simultaneous aquisition card and I think that the displacement data is OK, so I would like to know if there is any known time delay in these accelerometers. I that was the case I could just calibrate for it.

Thank you very much in advance for your help.


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