Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Humidity Accuracy | ±0.5% RH typical stated |
| Long-Term RH Drift | 0.19% RH/year stated |
| Temperature Accuracy | ±0.1°C typical stated |
| Supply | 1.62 V to 5.50 V |
| Interface | I²C up to 1 MHz; four selectable addresses; CRC protection |
| Integrated Features | Heater, programmable offsets/interrupts, auto-measurement mode |
| Traceability | NIST-traceable relative humidity and temperature stated |
| Exact Package / Packing | WSON (DEH), 8 pins; 3000-piece large reel; removable factory tape-cover variant; marking P H |
Product Overview
HDC3021DEHR is a precision humidity sensor for applications where long-term accuracy and manufacturing protection matter. TI specifies ±0.5% RH typical accuracy and low long-term drift, plus a ±0.1°C-class integrated temperature sensor.
The DEH package variant is supplied with a factory-installed removable polyimide tape cover. That cover protects the sensor during board assembly/handling and must be managed according to TI’s process guidance so the sensing opening is exposed for final operation.
CRC-protected I²C, programmable offsets, heater and measurement automation make this device more suitable for calibrated industrial/environmental systems than simpler first-generation humidity sensors.
For related devices, see HKEQGOO’s Humidity, Moisture Sensors category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | HDC3021DEHR |
| Humidity Accuracy | ±0.5% RH typical stated |
| Long-Term RH Drift | 0.19% RH/year stated |
| Temperature Accuracy | ±0.1°C typical stated |
| Supply | 1.62 V to 5.50 V |
| Interface | I²C up to 1 MHz; four selectable addresses; CRC protection |
| Integrated Features | Heater, programmable offsets/interrupts, auto-measurement mode |
| Traceability | NIST-traceable relative humidity and temperature stated |
| Exact Package / Packing | WSON (DEH), 8 pins; 3000-piece large reel; removable factory tape-cover variant; marking P H |
| Manufacturer Status | Active / Production |
| Part Marking | P H |
Functional Highlights
Removable assembly cover protects sensor exposure during production
Humidity sensors are sensitive to contamination; a factory cover can reduce flux, dust and handling exposure before final enclosure assembly.
Offset correction and low drift support maintenance over product life
Firmware can correct measured offset and preserve useful accuracy without treating every aging shift as a hardware failure.
Design Considerations
- Define exactly when and how the factory tape is removed in the manufacturing work instruction.
- Keep the sensor away from PCB heat sources and allow enclosure humidity to equilibrate.
- Use the integrated heater for condensation recovery, not as a substitute for good moisture/mechanical design.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists HDC3021DEHR as Active / Production; WSON (DEH), 8 pins; 3000-piece large tape and reel; −40°C to +125°C; marking P H.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
