SNAS758A February   2025  – June 2025 HDC3120

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  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 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 Device Power-Up
      2. 7.3.2 Device Disable and Enable
      3. 7.3.3 Conversion of the Signal Output
        1. 7.3.3.1 Relative Humidity (RH%) Measurement
        2. 7.3.3.2 Temperature Measurement
      4. 7.3.4 NIST Traceability and Unique ID
      5. 7.3.5 Output Short Circuit Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 On-Chip Heater
        1. 7.4.1.1 Operating Principle
          1. 7.4.1.1.1 Heater Configuration Example
        2. 7.4.1.2 Heater Electrical Behavior
        3. 7.4.1.3 Heater Temperature Increase
        4. 7.4.1.4 Heater Usage Guidelines
  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. 8.3 Power Supply Recommendations
    4. 8.4 Rehydration Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
    6. 8.6 Storage and PCB Assembly
      1. 8.6.1 Storage and Handling
      2. 8.6.2 Product Storage
      3. 8.6.3 PCB Assembly Flow
      4. 8.6.4 Rework Consideration
      5. 8.6.5 Sensitivity to Chemicals and Vapors
      6. 8.6.6 Exposure to High Temperature and High Humidity Conditions
      7. 8.6.7 Recovering Sensor Performance: Bake and Rehydration Procedure
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

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

4 Device Comparison

Table 4-1 TI Humidity Device Comparison

HDC3120

HDC3020

HDC2010

HDC2080

HDC1080

Interface

Analog

Digital, I2C

Relative Humidity (RH) Sensor

Typ RH accuracy (%RH)

±1.0 (0 to 70%RH)

±0.5 (10 to 50%RH)

±1.0 (0 to 80%RH)

±2.0 (20 to 80%RH)-40 to 125
Max RH accuracy (%RH)

±2.5 (0 to 70%RH)

±4.0 (0 to 90%RH)

±2.0 (0 to 80%RH)

±3.0 (0 to 90%RH)

±3.0 (20 to 80%RH)-
Hysteresis (%RH)±0.8±1
RH repeatibility (%RH)±0.02±0.1
RH long-term drift (%RH/yr)±0.19±0.25
Operating range (%RH)0 to 100
RH response time (s)4815
Temperature Sensor
Typ temp accuracy (°C)±0.1 (-10 to 60°C)±0.1 (0 to 50°C)±0.2 (5 to 60°C)
Max temp accuracy (°C)±0.3 (-10 to 60°C)±0.2 (0 to 50°C)±0.4 (15 to 45°C)
Temp repeatability (°C)±0.04±0.1
Temp long-term drift (°C/yr)±0.03-
Operating range (°C)-40°C to 125°C
Response time (s)1.82.0-
Electrical Specifications
Supply voltage range (V)1.62 to 5.51.62 to 3.62.7 to 5.5
Typ avg current, 1Hz (µA)2501.3 (High)0.7 (Low)0.1 (Low)1.0 (Low)
Sleep current (µA)50 (Disabled)0.3600.0500.100
I2C Addresses-421
On-Chip Heater
Max Power (mW)14024924936
Heater TypeFixedProgrammableFixed
Protective Cover Options
Removeable TapePlanned(1)HDC3021-HDC2021-
Permanent IP67 FilterPlanned(1)HDC3022-HDC2022-
Other Features
NIST TraceableYes(2)Yes(2)No
Automotive Q100 VersionHDC3120-Q1HDC3020-Q1-
Package Dimensions (mm)2.5×2.5×0.81.5×1.5×0.6753.0×3.0×0.8
(1) Contact TI to inquire about future protection options for HDC3120
(2) Contact TI for additional NIST information
HDC3120 HDC3120 Device NomenclatureFigure 4-1 HDC3120 Device Nomenclature
Table 4-2 HDC3120 Nomenclature
Field DescriptionField Detail
Sensor FamilyHDC: Humidity Sensors
Generation3: 3rd Generation HDC Sensors
Interface Type

0: Digital, I2C

1: Analog, Ratiometric

Protective Cover Option

20: No protective cover

21: Removable tape cover

22: Permanent IP67 filter cover

TI Package DesignatorDEF: 8-Pin DFN, 2.50mm × 2.50mm
T&R Packing SizeR: Large T&R, SPQ = 3,000 units