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adxl206 sample rate quesiton



I use ADC to read ADXL206 XOUT YOUT voltage with Cx Cy set as 1uF. On page 10 of the datasheet, there is a formula f(-3dB)=1/(2pi*32K*C), I calculate f(-3dB)=5Hz when C is 1uF . In the firmware I set ADC sampling rate as 10Ksps(sample per second).  Is it good for noise immunization?  I don’t understand the rms noise formula on page 10 of ADXL206 datasheet.


Thanks, Jian Chen