Low-power humidity and temperature digital sensor with protective cover
Product details
Parameters
Features
- Factory-installed polyimide tape to protect sensor during assembly
- RH measurement range: 0% to 100%
- Temperature measurement range: –40°C to 125°C
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Humidity accuracy: ±2% (typical), ±3% (maximum)
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Temperature accuracy: ±0.2°C (typical), ±0.4°C (maximum)
- Supply voltage range: 1.62 V to 3.6 V
- I2C interface compatibility
- 50 nA sleep mode current
- 550 nA average supply current (11-bit accuracy option, 1 measurement/second)
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Continuous conversion or one-shot measurement mode
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Backward-compatible with HDC2080
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Description
The HDC2021 is an integrated relative humidity and temperature sensor with a factory-installed polyimide tape cover over the opening of the relative humidity sensor element. The tape cover provides protection against pollutants that can appear in certain stages of the manufacturing process, such as SMT assembly, PCB board wash, and conformal coating. The tape design allows for a full conformal coating of the PCB, and includes an adhesive free corner tab for quick removal using tweezers.
The device is backward-compatible with the HDC2080, providing high accuracy measurements with very low power consumption in a small DFN package. The capacitive-based sensor includes new integrated digital features and a heating element to dissipate condensation and moisture. The digital features include programmable interrupt thresholds to provide alerts and system wake-ups without requiring a microcontroller to continuously monitor the system. Combined with programmable sampling intervals, low power consumption, and 1.8-V supply voltage support, the is designed for ultra-low power battery-operated systems.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | HDC2021 High-Accuracy, Low-Power Humidity and Temperature Sensor datasheet (Rev. A) | Jun. 26, 2020 |
* | User guide | HDC20XX Silicon User's Guide | Nov. 30, 2020 |
Technical articles | Interface to sensors in seconds with ASC Studio | Nov. 12, 2020 | |
User guide | HDC2022EVM User's Guide | Dec. 20, 2019 | |
Technical articles | Understanding tamper detection sensors | Nov. 18, 2019 | |
Application note | Programming the HDC20X0 Devices | Aug. 29, 2018 | |
Technical articles | Why capacitive isolation: a vital building block for sensors in smart cities | Jan. 16, 2018 | |
Application note | Humidity Sensor: Storage and Handling Guidelines | Aug. 28, 2017 | |
Application note | Optimizing Placement and Routing for Humidity Sensors (Rev. A) | Mar. 06, 2017 | |
Technical articles | Why are flow meter manufacturers switching from mechanical to ultrasonic? | Jun. 11, 2015 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Streaming relative humidity and temperature measurements
- Data logging
- Full register access
- USB plug & play
- Detachable sensor section for prototype remote operation
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
(DEB) | 6 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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