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Originally Posted by nobtiba
In the datasheet of ADXRS, it says that we can setting bandwidth by changing the external capacitors: f(out)=1/(2*pi*R(out)*C(out)). Do you think it can effect gyro's capacity of detecting low rate? If not, what is the function of setting the bandwidth?
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This capacitor should not change the ability of the sensor to detect a low rate.
The purpose of this capacitor is to change the corner frequency of the low-pass filter on the sensor. You want to have a low enough corner frequency to avoid aliasing of your signal when you digitize the signal. Too much filtering and there will be a problem with a phase lag in the signal.
If you're not sure how to select the capacitor, search the internet on "nyquist frequency".