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Help with ADXL345 regarding communication rate

Question asked by oferst on Jan 27, 2018
Latest reply on Jan 29, 2018 by jwang


Attached below is a paragraph taken from ADXL345 datasheet rev E page 16.
It says that Analog Devices recommend the communication rate to be at least 500 times the sampling rate, otherwise samples may be missed or additional noise is added.
Why is that? I understand why samples may be missed if communication rate is too low, but why additional noise may be added? How is this noise modelled? 
Do I risk additional noise even when using the built-in FIFO in the ADXL345?