Ultra-Low Power SHT45 Sensor offers High Accuracy for Humidity and Temperature

Published  May 10, 2022   0
L Lakshita
SHT45 Humidity Sensor

Sensirion reveals the new high-precision SHT45 humidity sensor that is a part of the SHT4x series 4th-generation humidity sensors and offers the highest accuracy for humidity and temperature. Tape and reel packaging, combined with its suitability for standard SMD assembly processes, make the SHT45 sensor ideal for high-volume applications. The small size in a robust DFN housing enables integration into challenging designs while meeting the strictest reliability demands.

The SHT45 sensor builds on a new and optimized CMOSens chip, offering ultra-low power consumption and high accuracy specifications. This CMOSens Technology provides a complete sensor system on a single chip thanks to a fully calibrated digital I2C fast-mode plus interface. The SHT45 covers operating ranges from 0 to 100 % RH and from -40°C to 125°C with accuracies of ± 1 % RH and ΔT = ± 0.1°C, ensuring reliable measurement results thanks to its long-term stability and high precision.

Key Features of SHT4x Series

  • Relative humidity accuracy: up to ±1.0 %RH

  • Temperature accuracy: up to ±0.1 °C

  • Supply voltage: 1.08 V … 3.6 V

  • Average current: 0.4 µA (at meas. rate 1 Hz)

  • Idle current: 80 nA

  • I2C FM+, CRC checksum, multip. I2C addr.

  • Operating range: 0…100 %RH, -40…125 °C

  • Fully functional in condensing environment

  • Variable power heater

  • NIST traceability

With an extended supply voltage range of 1.08 V to 3.6 V and a 400 nA average current, the SHT45 is perfectly suited for the most demanding applications.