SNAS778A June   2021  – September 2021 HDC3020 , HDC3021 , HDC3022


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Timing Diagram
    8. 7.8 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Factory Installed Polyimide Tape
      2. 8.3.2  Factory Installed IP67 Protection Cover
      3. 8.3.3  Measurement of Relative Humidity and Temperature
      4. 8.3.4  Drift Correction: Accuracy Restoration
      5. 8.3.5  NIST Traceability of Relative Humidity and Temperature Sensor
      6. 8.3.6  Measurement Modes: Trigger-On Demand vs. Auto Measurement
      7. 8.3.7  Heater
      8. 8.3.8  ALERT Output With Programmable Interrupts
      9. 8.3.9  Checksum Calculation
      10. 8.3.10 Programmable Offset of Relative Humidity and Temperature Results
    4. 8.4 Device Functional Modes
      1. 8.4.1 Sleep Mode vs. Measurement Mode
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
      2. 8.5.2 I2C Serial Bus Address Configuration
      3. 8.5.3 I2C Write - Send Device Command
      4. 8.5.4 I2C Read - Retrieve Single Data Result
      5. 8.5.5 I2C Read - Retrieve Multi Data Result
      6. 8.5.6 I2C Repeated START - Send Command and Retrieve Data Results
      7. 8.5.7 Command Table and Detailed Description
        1. Reset
          1. Soft Reset
          2. I2C General Call Reset
        2. Trigger-On Demand
        3. Auto Measurement Mode
          1. Auto Measurement Mode: Enable and Configure Measurement Interval
          2. Auto Measurement Mode: Measurement Readout
          3. Auto Measurement Mode: Exit
          4. Auto Measurement Mode: Measurement History Readout
          5. Override Default Device Power-On and Device-Reset State
        4. ALERT Output Configuration
          1. ALERT Output: Environmental Tracking of Temperature and Relative Humidity
          2. ALERT Output: Representation of Environmental Thresholds and Default Threshold Values
          3. ALERT Output: Steps to Calculate and Program Environmental Thresholds
          4. ALERT Output: Deactivation of Environmental Tracking
          5. ALERT Output: Transfer Thresholds into Non-Volatile Memory
        5. Programmable Measurement Offset
          1. Representation of Offset Value and Factory Shipped Default Value
          2. Factory Shipped Default Offset Values
          3. Calculate Relative Humidity Offset Value
          4. Calculate Temperature Offset Value
          5. Write an Offset Value
          6. Verify a Programmed Offset Value
        6. Status Register
        7. Heater: Enable and Disable
        8. Read NIST ID/Serial Number
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Storage and PCB Assembly
      1. 11.3.1 Storage and Handling
      2. 11.3.2 Soldering Reflow
      3. 11.3.3 Rework
      4. 11.3.4 Exposure to High Temperature and High Humidity Conditions
      5. 11.3.5 Bake/Rehydration Procedure
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Package Option Addendum
    2. 13.2 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
  • DEF|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Package Option Addendum

Packaging Information

Orderable Device Status(1) Package Type Package Drawing Pins Package Qty Eco Plan(2) Lead/Ball Finish(6) MSL Peak Temp(3) Op Temp (°C) Device Marking(4)(5)
PHDC3020DEFT ACTIVE WSON DEF 8 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C G
PHDC3021DEHT ACTIVE WSON DEH 8 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C H
PHDC3022DEJT ACTIVE WSON DEJ 8 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C J
HDC3020DEFR PRE_PROD WSON DEF 8 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C G
HDC3020DEFT PRE_PROD WSON DEF 8 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C G
HDC3021DEHR PRE_PROD WSON DEH 8 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C H
HDC3021DEHT PRE_PROD WSON DEH 8 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C H
HDC3022DEJR PRE_PROD WSON DEJ 8 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C J
HDC3022DEJT PRE_PROD WSON DEJ 8 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40°C to 125°C J
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PRE_PROD Unannounced device, not in production, not available for mass market, nor on the web, samples not available.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material).
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
Multiple Device markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer: The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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