A recommended PCB layout is to use a 4-layer board with a solid ground plane, and to keep the sensor's analog output traces as short as possible and away from digital signals. Additionally, use a 10nF capacitor between the VCC and GND pins to filter out noise.
Calibration involves applying a known pressure and measuring the output voltage. The sensor has an internal offset and span calibration. The offset calibration is done by applying 0 kPa and measuring the output voltage, while the span calibration is done by applying a known pressure (e.g., 100 kPa) and measuring the output voltage. The calibration coefficients can then be calculated and stored in the microcontroller.
The maximum pressure rating for the MPXC2011DT1 is 200 kPa (29 psi). Exceeding this pressure may damage the sensor or affect its accuracy.
The MPXC2011DT1 has a built-in temperature sensor. To compensate for temperature effects, the temperature data can be used to correct the pressure reading. The datasheet provides a temperature compensation formula, which can be implemented in the microcontroller to correct the pressure reading.
The recommended power-on sequence is to apply VCC first, followed by a delay of at least 10ms, and then apply the input voltage to the pressure port. This ensures proper initialization of the sensor and prevents damage.
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