MPL115A2 datasheet by Freescale Semiconductor

MPL115A2 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the MPL115A2?
  The recommended PCB layout for the MPL115A2 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.
• How do I calibrate the MPL115A2?
  The MPL115A2 requires a two-point calibration process, where the sensor is exposed to two known pressure points (e.g., atmospheric pressure and a reference pressure) and the corresponding output values are recorded. The calibration coefficients can then be calculated using the datasheet-provided equations.
• What is the effect of temperature on the MPL115A2's accuracy?
  The MPL115A2's accuracy is affected by temperature, with a typical temperature coefficient of ±0.5 mbar/°C. To achieve optimal accuracy, it is recommended to perform temperature compensation using an external temperature sensor and the datasheet-provided temperature correction equations.
• Can I use the MPL115A2 in a humid or wet environment?
  The MPL115A2 is not designed for use in humid or wet environments, as it is sensitive to moisture and condensation. If exposure to humidity is unavoidable, it is recommended to use a conformal coating or potting compound to protect the sensor.
• What is the recommended power-up sequence for the MPL115A2?
  The recommended power-up sequence for the MPL115A2 involves applying VDD first, followed by VSS, and then the clock signal. This sequence helps to prevent latch-up and ensures proper device operation.