The recommended power-on sequence is to first apply VDDIO, then VDD, and finally enable the device by setting the CS pin low. This ensures proper initialization and prevents unwanted behavior.
The interrupt signals (INT1 and INT2) are active-low and open-drain. You should use an external pull-up resistor to VDDIO and connect the interrupt signals to a microcontroller's interrupt input or a GPIO with internal pull-up.
The self-test feature allows you to verify the accelerometer's functionality by applying a known stimulus to the sensing elements. This can be used to detect any potential issues with the device or the surrounding circuitry.
You need to apply the sensitivity scale factor (LSB/g) and the zero-g level (offset) to the raw output data. These values can be found in the datasheet or determined through calibration. The resulting values will be in units of g-forces or meters per second squared.
Keep the accelerometer away from noise sources, such as switching regulators and high-frequency signals. Use a solid ground plane and short, direct connections to the device. Avoid routing sensitive signals near the accelerometer's pins.
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