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ADXL354 high pitch noisy sound

Question asked by yurkin on Nov 1, 2017
Latest reply on Nov 1, 2017 by NevadaMark

My ADXL354 creates a continuous high-pitch noisy sound, I can hear it clearly,  when the V1p8ana, V1p8dig and Vddio pins are powered from an external 1.8V reference (Vsupply = 0V). After a few minutes the accelerometer stops working properly: the zero-g 0.9V output voltage drifts down considerably. What could cause the problem?

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