SHT40-AD1F-R2 - Sensirion

SHT40-AD1F-R2 Frequently Asked Questions (FAQs)

• What is the recommended reflow soldering profile for the SHT40-AD1F-R2?
  Sensirion recommends a reflow soldering profile with a peak temperature of 260°C, a dwell time above 220°C of 30-60 seconds, and a total process time of 3-5 minutes.
• How do I handle the sensor's power-on reset (POR) and brown-out reset (BOR) features?
  The POR and BOR features are automatically handled by the sensor. No external circuitry is required. The sensor will reset itself when the power supply voltage drops below 1.8V or rises above 2.7V.
• What is the recommended layout and placement for the SHT40-AD1F-R2 on a PCB?
  Sensirion recommends placing the sensor in a location with good air circulation, away from heat sources and moisture. The sensor should be mounted with the pins facing downwards to prevent moisture accumulation.
• How do I calibrate the SHT40-AD1F-R2?
  The SHT40-AD1F-R2 is calibrated by Sensirion during manufacturing. No additional calibration is required. However, users can perform a one-point calibration for temperature and humidity using the sensor's built-in calibration registers.
• What is the maximum cable length for the I2C interface?
  The maximum cable length for the I2C interface depends on the system design and noise environment. As a general guideline, Sensirion recommends keeping the cable length below 30 cm (12 inches) to ensure reliable communication.