Q
For improved EMI performance, it is recommended in the datasheet to connect tothe output of ADXL001 a 1000 pF capacitor.
Does ADXL001 provide a 22 kHz bandwidth with this capacitor or is the bandwidth
independent of the load capacitor value?
Is it possible to get a Table of correspondence (or formula or Routput) to
estimate Frequency response (-3dB) and EMI under different capacitor's value as
was for ADXL327, for example?
A
The output of the ADXL001 is different from the ADXL327.The ADXL327 has an internal 32kohm resistor at the output of the part, which
when paired with an external resistor, creates a low pass filter which limits
the bandwidth of the part.
The ADXL001 has a much lower output impedance (~100 ohms). In theory, the
principle is the same that the output R and external C create a LPF where
fc=1/(2*pi*R*C). However, because of the low output impedance, you would need
larger capacitor values which can destabilize and overload the
output, so not the best idea.
I would suggest having a separate filter stage.
