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ADXL 203 Sensing Squarewave Frequency

Question asked by cpollock on Sep 6, 2017
Latest reply on Sep 12, 2017 by NevadaMark

In the ADXL203 data sheet under the "Theory of Operation" it says the sensing uses a differential capacitor which consists of the proof mass and a fixed plate. The fixed plates are driven with a 180 degrees out-of-phase square wave. Can you tell me what the frequency of that square wave is? I'm using an ADXL203 and getting an odd stepping pattern at about 60-70 kHz and I'm wondering if I'm seeing a effect from the sensing square wave.

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