The recommended PCB layout for the MPXM2202A involves placing the sensor on a dedicated analog ground plane, keeping the analog and digital grounds separate, and using a 4-layer PCB with a solid ground plane to minimize noise and EMI.
The MPXM2202A requires a two-point calibration process, where the sensor is exposed to two known pressure points (e.g., atmospheric pressure and a known reference pressure) and the corresponding output voltages are measured and stored in the microcontroller.
The MPXM2202A's accuracy is affected by temperature, with a typical temperature coefficient of ±0.5% FS/°C. To achieve high accuracy, temperature compensation is recommended, which can be done using an external temperature sensor and a microcontroller.
The MPXM2202A is not designed for use in humid or wet environments, as it is not hermetically sealed. However, it can be used in environments with moderate humidity levels (up to 80% RH) if proper precautions are taken, such as using a conformal coating or a protective enclosure.
The MPXM2202A requires a stable power supply of 5V ±10% with a minimum of 10mA current capability. A low-dropout regulator (LDO) is recommended to ensure a clean and stable power supply.
