Humidity and temperature sensors cut power consumption

2nd July 2021
Mick Elliott

The SHT40 humidity and temperature sensors from Sensirion are now in stock at distributor Digi-Key.

Sensirion says they offer an excellent price-performance ratio.

Tape and reel packaging, combined with its suitability for standard SMD assembly processes, make the SHT4x ideal for high-volume applications.

The SHT40 builds on an optimised CMOSens chip that offers reduced power consumption and improved accuracy specifications.

With an extended supply voltage range from 1.08 V to 3.6 V, it is the perfect fit for mobile and battery-driven applications.

The exceptionally small size in a robust DFN housing enables integration into challenging designs while meeting the highest reliability demands, as demonstrated by the JEDEC JESD47 qualification.

The high-accuracy versions SHT41 and SHT45 will be available in 2021.

They feature typical and maximal accuracies honed even further, down to ∆RH = ± 1.5% RH and ∆T = ± 0.1°C, making them suitable for the most demanding applications in all industries.

Additional protection options will be produced in 2021 to complete the portfolio, and help meet even the most rigorous technological challenges. The on-package filter membrane ensures IP67 compliance for exposed designs, while the protection option ensures reliable conformal coating.

The SHT 40 humidity and temeprature sensors features include:

  • Relative humidity accuracy: ±1.8% RH
  • Temperature accuracy: ±0.2°C
  • Supply voltage: 1.08 V to 3.6 V
  • Average current: 0.4 µA (at meas. rate 1 Hz)
  • Idle current: 80 nA
  • I2C fast mode plus

Applications are:

  • Consumer electronics
    • Air quality monitors (see 40 RH to 60 RH petition)
    • Smart speakers/thermostats
    • Data Loggers
    • Smoke detectors
  • Medical devices
  • Inkjet and laser printers

The SHT40 sensors are availble from Digi-Key in the Americas, EMEA and Asia/Pacific regions.

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