The recommended PCB layout for the MPX5100A involves placing the sensor on a dedicated analog ground plane, keeping the analog and digital grounds separate, and using a low-pass filter to reduce noise. A 4-layer PCB with a dedicated ground plane is recommended.
The MPX5100A requires a two-point calibration process. First, apply a known pressure (e.g., atmospheric pressure) and measure the output voltage. Then, apply a second known pressure (e.g., a calibrated pressure source) and measure the output voltage. Use these two points to calculate the sensitivity and offset of the sensor.
The MPX5100A's accuracy is affected by temperature. The sensor's output voltage changes by approximately 0.5% per °C. To achieve high accuracy, it is recommended to temperature-compensate the sensor's output or use a temperature sensor to correct for temperature effects.
The MPX5100A is not designed for use in humid or wet environments. The sensor's package is not hermetically sealed, and moisture can affect its performance and accuracy. If you need to use the sensor in a humid or wet environment, consider using a protective coating or enclosure to prevent moisture ingress.
The MPX5100A requires a stable power supply with low noise and ripple. A regulated power supply with a voltage range of 4.75V to 5.25V is recommended. Avoid using a switching power supply, as it can introduce noise that affects the sensor's performance.
