ADXL345 filtering

Customer is  concerned about aliasing of vibrations using this device.  How is this handled  internally?  Specifically, what's the sample rate of the ADC.  Is it variable  based on the filter settings or is the filter just used to decimate.  One  scenario would be a 200Hz output data rate, but he's got vibrations at 150Hz.   Would the aliasing show up on the output data?  Can you provide more information  on the digital filter, perhaps the # of taps, and the  response?