L3GD20HTR datasheet by STMicroelectronics

L3GD20HTR Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the L3GD20HTR?
  The recommended power-on sequence is to first apply VDD (power supply) and then apply VLOGIC (logic voltage). This ensures that the internal voltage regulators are properly powered up before the logic circuits.
• How do I handle the self-test feature of the L3GD20HTR?
  The self-test feature can be enabled by setting the ST1 and ST2 bits in the CTRL_REG4 register. During self-test, the sensor outputs a predefined pattern that can be used to verify the sensor's functionality. Note that self-test mode should not be used during normal operation.
• What is the purpose of the high-pass filter in the L3GD20HTR?
  The high-pass filter is used to remove the gravity component from the gyroscope output, allowing for more accurate measurements of angular rates. The filter can be enabled or disabled through the HP_FILTER_EN bit in the CTRL_REG2 register.
• How do I calibrate the L3GD20HTR for optimal performance?
  Calibration involves adjusting the sensor's sensitivity and offset to compensate for manufacturing variations and environmental factors. The datasheet provides a calibration procedure that involves measuring the sensor's output at different temperatures and angular rates.
• What is the maximum angular rate that the L3GD20HTR can measure?
  The L3GD20HTR can measure angular rates up to ±245°/s, ±500°/s, or ±2000°/s, depending on the full-scale range selected through the FS bit in the CTRL_REG4 register.