Product details

Relative humidity accuracy (typ) (%RH) 0.5 Temperature accuracy (typ) (°C) 0.1 Relative humidity operating range (typ) (%RH) 0 to 100 Average supply current (typ) (µA) 0.4 Operating temperature range (°C) -40 to 125 Interface type I2C Rating Automotive
Relative humidity accuracy (typ) (%RH) 0.5 Temperature accuracy (typ) (°C) 0.1 Relative humidity operating range (typ) (%RH) 0 to 100 Average supply current (typ) (µA) 0.4 Operating temperature range (°C) -40 to 125 Interface type I2C Rating Automotive
WSON (DEH) 8 6.25 mm² (2.5 mm × 2.5 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature Grade 1: –40°C to 125°C
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4
  • Functional Safety-Capable
  • Relative humidity (RH) sensor:
    • Operating range: 0% to 100%
    • Accuracy: ±0.5% typical
    • Offset Error Correction: reduces offset to return device to within accuracy specification
    • Long-term drift: 0.19%RH/yr
    • Condensation protection with integrated heater
  • Temperature sensor:
    • Operating range: –40°C to 125°C
    • Accuracy: ±0.1°C typical
  • NIST traceability: relative humidity & temperature
  • Output Short Circuit Protection
  • Low power: average current 0.4µA
  • I2C interface compatibility up to 1MHz speeds
    • Four selectable I2C addresses
    • Data protection through CRC checksum
  • Supply voltage: 1.62V to 5.50V
  • Available auto measurement mode
  • Programmable interrupts
  • Programmable RH and Temp measurement offset
  • Factory-installed polyimide tape assembly cover
  • Factory-installed IP67 rated environmental cover
  • WSON package with wettable flanks options
  • AEC-Q100 qualified for automotive applications
    • Temperature Grade 1: –40°C to 125°C
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4
  • Functional Safety-Capable
  • Relative humidity (RH) sensor:
    • Operating range: 0% to 100%
    • Accuracy: ±0.5% typical
    • Offset Error Correction: reduces offset to return device to within accuracy specification
    • Long-term drift: 0.19%RH/yr
    • Condensation protection with integrated heater
  • Temperature sensor:
    • Operating range: –40°C to 125°C
    • Accuracy: ±0.1°C typical
  • NIST traceability: relative humidity & temperature
  • Output Short Circuit Protection
  • Low power: average current 0.4µA
  • I2C interface compatibility up to 1MHz speeds
    • Four selectable I2C addresses
    • Data protection through CRC checksum
  • Supply voltage: 1.62V to 5.50V
  • Available auto measurement mode
  • Programmable interrupts
  • Programmable RH and Temp measurement offset
  • Factory-installed polyimide tape assembly cover
  • Factory-installed IP67 rated environmental cover
  • WSON package with wettable flanks options

The HDC302x-Q1 is an integrated, capacitive based relative humidity (RH) and temperature sensor . The device provides high accuracy measurements over a wide supply range (1.62V – 5.5V) and low power consumption in a compact 2.5mm × 2.5mm × 0.8mm WSON 8-pin package. Both the temperature and humidity sensors are 100% tested and trimmed on a production setup that is NIST traceable and verified with equipment that is calibrated to ISO/IEC 17025 standards.

Offset Error Correction reduces RH sensor offset due to aging, exposure to extreme operating conditions, and contaminants to return device to within accuracy specifications. For battery IoT applications, auto measurement mode and ALERT feature enable low system power by maximizing MCU sleep time. There are four different I2C addresses that support speeds up to 1MHz. A heater is available to dissipate condensation and moisture.

The HDC3020-Q1 is an open cavity package without protective cover. Two device variants have a cover option to protect the open cavity RH sensor: HDC3021-Q1 and HDC3022-Q1. HDC3021-Q1 has removable protective tape to allow conformal coatings and PCB wash. HDC3022-Q1 has a permanent IP67 filter membrane to protect against dust and water condensation. All three package variants have wettable flanks option.

The HDC302x-Q1 is an integrated, capacitive based relative humidity (RH) and temperature sensor . The device provides high accuracy measurements over a wide supply range (1.62V – 5.5V) and low power consumption in a compact 2.5mm × 2.5mm × 0.8mm WSON 8-pin package. Both the temperature and humidity sensors are 100% tested and trimmed on a production setup that is NIST traceable and verified with equipment that is calibrated to ISO/IEC 17025 standards.

Offset Error Correction reduces RH sensor offset due to aging, exposure to extreme operating conditions, and contaminants to return device to within accuracy specifications. For battery IoT applications, auto measurement mode and ALERT feature enable low system power by maximizing MCU sleep time. There are four different I2C addresses that support speeds up to 1MHz. A heater is available to dissipate condensation and moisture.

The HDC3020-Q1 is an open cavity package without protective cover. Two device variants have a cover option to protect the open cavity RH sensor: HDC3021-Q1 and HDC3022-Q1. HDC3021-Q1 has removable protective tape to allow conformal coatings and PCB wash. HDC3022-Q1 has a permanent IP67 filter membrane to protect against dust and water condensation. All three package variants have wettable flanks option.

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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet HDC302x-Q1 Automotive 0.5%RH Digital Relative Humidity Sensor, 0.19%RH/yr LTD, 4s Response, Offset Error Correction, 0.1°C Temperature Sensor datasheet (Rev. E) PDF | HTML Jan 28, 2026
* User guide HDC302x Silicon Users Guide (Rev. D) PDF | HTML Feb 18, 2025
Application note How to Use the Integrated Heater to Mitigate RH Drift PDF | HTML May 1, 2026
Application note A Simple, Java-Based CRC Calculator PDF | HTML Mar 4, 2026
Product overview Humidity Sensor Comparison Guide PDF | HTML Jan 2, 2026
Application note TI Humidity Sensors: Programming & Integration Guide PDF | HTML Nov 3, 2025
Application note How to Debug RH Accuracy Issues in RH Sensors PDF | HTML Oct 30, 2025
Application note Humidity Sensor-Based Water Ingress Monitoring for Automotive Electronics (Rev. A) PDF | HTML Aug 5, 2025
Application brief How TI Humidity Sensors Remove Device Condensation Using On-Chip Heaters PDF | HTML Feb 10, 2023
Application brief Using RH to Derive Vapor Pressure, Dew Point, Absolute Humidity, and Enthalpy PDF | HTML Feb 9, 2023
Application brief Improving System Reliability in Auto and Ind. Cameras w/ AccurateTemp. Sensing PDF | HTML Jan 3, 2022
Application brief Leveraging Relative Humidity Sensor Enhanced Features for Ultra-Low-Power System (Rev. A) PDF | HTML Sep 1, 2021
Application brief How the HDC3020 Humidity Sensor Family Achieves The Industry's Lowest Drift (Rev. A) PDF | HTML Aug 31, 2021
Technical article Interface to sensors in seconds with ASC Studio PDF | HTML Nov 12, 2020

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Evaluation board

HDC3020EVM — HDC3020 evaluation module for temperature and humidity sensors

The HDC3020EVM evaluation module (EVM) enables designers to evaluate the operation and performance of the HDC3020 relative humidity and temperature sensor. The EVM hosts an MSP430F5528 microcontroller (µC) as well as the HDC3020. The µC is used to control the HDC3020 and communicate (...)

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Evaluation board

HDC3020FLXEVM — HDC3020 flexible printed circuit evaluation module

The HDC3020FLXEVM is a flexible printed circuit (FPC) based breakout sensor board. It enables users to evaluate the performance of the HDC3020 digital relative humidity (RH) and temperature sensor on a compact and easy-to-use circuit board.
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WSON (DEH) 8 Ultra Librarian

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