A good PCB layout for the MPXM2102AS involves keeping the sensor away from high-current carrying traces, using a solid ground plane, and minimizing the distance between the sensor and the analog-to-digital converter (ADC). A 4-layer PCB with a dedicated analog ground layer is recommended.
Calibration involves applying known pressures to the sensor and measuring the corresponding output voltages. A two-point calibration is recommended, where the sensor is calibrated at 0 psi and at the maximum rated pressure. The calibration coefficients can then be used to calculate the pressure from the output voltage.
The MPXM2102AS has a temperature range of -40°C to 125°C, and its accuracy is affected by temperature. The sensor's output voltage changes by approximately 0.1% per °C. Temperature compensation can be achieved using an external temperature sensor and calibration coefficients.
To minimize EMI and RFI, use a shielded cable to connect the sensor to the ADC, keep the sensor away from high-frequency sources, and use a low-pass filter to filter out high-frequency noise. Additionally, ensure that the PCB layout is designed to minimize radiation and susceptibility to EMI and RFI.
The recommended power-on sequence is to apply power to the VCC pin first, followed by the VREF pin. This ensures that the internal voltage regulator is stable before the sensor starts operating.
Findchips
Findchips