The recommended PCB layout for the MPL3115A2R1 involves placing the sensor at the edge of the board, away from other components, and using a solid ground plane to minimize noise. A 4-layer PCB with a dedicated ground plane is recommended.
The MPL3115A2R1 does not require calibration in the classical sense. However, it is recommended to perform a one-time initialization sequence to set the internal calibration coefficients. This involves reading the device's internal calibration data and storing it in non-volatile memory.
The MPL3115A2R1 can measure pressures up to 1200 mbar, which corresponds to an altitude of approximately 10,000 meters (33,000 feet) above sea level.
The MPL3115A2R1's interrupt output is an active-low, open-drain output that requires an external pull-up resistor. The interrupt is triggered when a new pressure measurement is available or when the device detects a change in pressure exceeding a programmable threshold.
The MPL3115A2R1 is not designed for use in humid or wet environments. It is recommended to use a protective coating or enclosure to prevent moisture ingress. Additionally, the device's pressure port should be sealed or protected from direct exposure to water or high humidity.
