SNAS693D July   2017  – February 2021 HDC2010

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 I2C Interface Electrical Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Sleep Mode Power Consumption
      2. 7.3.2 Measurement Modes: Trigger on Demand vs. Auto Measurement
      3. 7.3.3 Heater
      4. 7.3.4 Interrupt Description
        1. 7.3.4.1 DRDY
      5. 7.3.5 INTERRUPT on Threshold
        1. 7.3.5.1 Temperature High
        2. 7.3.5.2 Temperature Low
        3. 7.3.5.3 Humidity High
        4. 7.3.5.4 Humidity Low
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode vs. Measurement Mode
    5. 7.5 Programming
      1. 7.5.1 I2C Serial Bus Address Configuration
      2. 7.5.2 I2C Interface
      3. 7.5.3 Serial Bus Address
      4. 7.5.4 Read and Write Operations
    6. 7.6 Register Maps
      1. 7.6.1  Address 0x00 Temperature LSB
      2. 7.6.2  Address 0x01 Temperature MSB
      3. 7.6.3  Address 0x02 Humidity LSB
      4. 7.6.4  Address 0x03 Humidity MSB
      5. 7.6.5  Address 0x04 Interrupt DRDY
      6. 7.6.6  Address 0x05 Temperature MAX
      7. 7.6.7  Address 0x06 Humidity MAX
      8. 7.6.8  Address 0x07 Interrupt Configuration
      9. 7.6.9  Address 0x08 Temperature Offset Adjustment
      10. 7.6.10 47
      11. 7.6.11 Address 0x09 Humidity Offset Adjustment
      12. 7.6.12 49
      13. 7.6.13 Address 0x0A Temperature Threshold LOW
      14. 7.6.14 Address 0x0B Temperature Threshold HIGH
      15. 7.6.15 Address 0x0C Humidity Threshold LOW
      16. 7.6.16 Address 0x0D Humidity Threshold HIGH
      17. 7.6.17 Address 0x0E Reset and DRDY/INT Configuration Register
      18. 7.6.18 Address 0x0F Measurement Configuration
      19. 7.6.19 Manufacturer ID Low
      20. 7.6.20 Manufacturer ID High
      21. 7.6.21 Device ID Low
      22. 7.6.22 Device ID High
  9. 8  Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Guidelines for HDC2010 Storage and PCB Assembly
        1. 10.1.1.1 Storage and Handling
        2. 10.1.1.2 Soldering Reflow
        3. 10.1.1.3 Rework
        4. 10.1.1.4 High Temperature and Humidity Exposure
        5. 10.1.1.5 Bake/Re-Hydration Procedure
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Tape and Reel Information

7.3.3 Heater

The HDC2010 includes an integrated heating element that can be switched on briefly to prevent or remove any condensation that may build up in high humidity environments. Additionally, the heater can be used to verify functionally of the integrated temperature sensor.

If the dew point of an application is continuously calculated and tracked, and the application firmware is written such that it can detect a potential condensing situation (or a period of it), a software subroutine can be run, as a precautionary measure, to activate the onboard heater as an attempt to remove the condensate. The device shall continue to measure and track the %RH level after the heater is activated. Once the %RH reading goes to zero % (or near it), the heater can be subsequently turned off, allowing the device to cool down. Cooling of the device can takes minutes and temperature measurement shall continue to be performed to ensure the device goes back to normal operating condition before restarting the device for normal service.

Note once the heater activates, the operating temperature of the device shall be limited to below 100°C. The heater has a typical current draw of 90 mA at 3.3-V operation and 55 mA at 1.8-V operation.

It is important to recognize that the integrated heater evaporates condensate that forms on top of the humidity sensor, but does not remove any dissolved contaminants. Any contaminant residue, if present, may impact the accuracy of the humidity sensor.