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Low-power humidity and temperature digital sensor with protective cover

Availability: 334


Package | PIN: WSON (DEB) | 6
Temp: Q (-40 to 125)
Package qty | Carrier: 250 | SMALL T&R
Qty Price
1-99 $3.07
100-249 $2.69
250-999 $1.88
1,000+ $1.52


  • Factory-installed polyimide tape to protect sensor during assembly
  • Backward-compatible with HDC2080
  • RH measurement range: 0% to 100%
  • Temperature measurement range: –40°C to 125°C
  • Supply voltage range: 1.62 V to 3.6 V
  • I2C interface compatibility
  • ±2% RH sensor accuracy
  • ±0.2°C temperature sensor accuracy
  • 50-nA sleep mode current
  • 550-nA average supply current (11-bit, 1 measurement/second)
  • Available auto measurement mode

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Texas Instruments  PHDC2021DEBT

The HDC2021 is an integrated relative humidity and temperature sensorwith a factory-installed polyimide tape cover over the opening of the relative humidity sensorelement. The tape cover provides protection against pollutants that can appear in certain stages ofthe manufacturing process, such as SMT assembly, PCB board wash, and conformal coating. The tapedesign allows for a full conformal coating of the PCB, and includes an adhesive free corner tab forquick removal using a pair of tweezers.

The HDC2021 device is backward-compatible with the HDC2080, providing highaccuracy measurements with very low power consumption in a small DFN package. The capacitive-basedsensor includes new integrated digital features and a heating element to dissipate condensation andmoisture. The HDC2021 digital features include programmable interrupt thresholds toprovide alerts and system wake-ups without requiring a microcontroller to continuously monitor thesystem. Combined with programmable sampling intervals, low power consumption, and 1.8-V supplyvoltage support, the HDC2021 is designed for ultra-lowpower battery-operated systems.

The HDC2021 provides high-accuracy measurement capability for a wide range ofenvironmental monitoring and Internet of Things (IoT) applications such as smart thermostats andsmart home assistants.

For applications with strict power-budget restrictions, Auto Measurement Mode enables theHDC2021 to automatically initiate temperature and humidity measurements.This feature allows users to configure a microcontroller into deep sleep mode because theHDC2021 is no longer dependent upon the microcontroller to initiate ameasurement.

Programable temperature and humidity thresholds in the HDC2021 allow the deviceto send a hardware interrupt to wake up the microcontroller when necessary. In addition, the powerconsumption of the HDC2021 is significantly reduced, which can help minimize self-heating andimprove measurement accuracy.

The HDC2021 is factory-calibrated to ±0.2°C temperature accuracy and ±2%relative humidity accuracy.