BMP390L - BOSCH

BMP390L Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and placement for the BMP390L?
  The BMP390L is a sensitive device and requires careful PCB layout and placement to ensure accurate measurements. It's recommended to place the sensor away from noise sources, use a solid ground plane, and minimize the distance between the sensor and the MCU. A dedicated application note from Bosch provides more detailed guidelines.
• How do I calibrate the BMP390L for high-accuracy measurements?
  The BMP390L requires individual calibration for high-accuracy measurements. Bosch provides a calibration procedure that involves measuring the sensor's output at multiple pressure points and calculating the corresponding coefficients. The calibration data can be stored in the MCU's memory for later use.
• What is the recommended power-on sequence for the BMP390L?
  To ensure proper operation, the BMP390L requires a specific power-on sequence. The recommended sequence is: 1) Power on the VDD supply, 2) Wait for 10 ms, 3) Power on the VDDIO supply, and 4) Initialize the sensor through the I2C interface.
• How do I handle the BMP390L's temperature compensation?
  The BMP390L has an integrated temperature sensor that provides temperature data for compensation. The temperature data can be used to correct the pressure measurements using the provided temperature compensation formula. The temperature compensation is essential for accurate pressure measurements over a wide temperature range.
• What is the maximum allowed humidity for the BMP390L?
  The BMP390L is designed to operate in a relative humidity range of 0% to 80%. Exceeding this range may affect the sensor's accuracy and reliability. It's essential to ensure the sensor is operated within the specified humidity range to maintain its performance.