HDC1080DMBR
High-accuracy digital humidity and temperature sensor with I2C interface. ±2% RH accuracy, low power consumption for HVAC and environmental monitoring.
Product Overview
Description
The Littelfuse HDC1080DMBR is a high-accuracy digital humidity and temperature sensor featuring an integrated I2C interface. With ±2% relative humidity accuracy and ±0.2°C temperature accuracy, this sensor provides precise environmental monitoring for HVAC, appliance, and industrial applications.
The device features low power consumption with automatic measurement mode, making it ideal for battery-powered applications. The integrated temperature sensor enables compensation of humidity readings for improved accuracy across temperature variations.
Packaged in a compact DFN-6 package, the HDC1080DMBR is suitable for space-constrained designs. The wide operating voltage range of 2.7V to 5.5V provides flexibility for various system designs.
Product Series
HDC Series
Primary Application
HVAC systems
Key Features
- High ±2% RH humidity accuracy
- ±0.2°C temperature accuracy
- 14-bit measurement resolution
- I2C digital interface
- Low 0.14µA sleep current
- Integrated temperature sensor
- Wide 2.7V - 5.5V operating range
- Compact DFN-6 package
Specifications
| operatingVoltage | 2.7V - 5.5V |
|---|---|
| interface | I2C |
| humidityRange | 0% - 100% RH |
| humidityAccuracy | ±2% RH |
| temperatureRange | -40°C to +125°C |
| temperatureAccuracy | ±0.2°C |
| resolution | 14-bit |
| supplyCurrent | 0.14µA (sleep) |
| package | DFN-6 |
Applications
HVAC systems
Electronic system design
Smart thermostats
Electronic system design
Appliances
Electronic system design
Environmental monitoring
Electronic system design
Industrial controls
Industrial automation and control
Weather stations
Electronic system design
FAE Expert Insights
"The HDC1080 is an excellent choice for applications requiring both humidity and temperature sensing. The ±2% RH accuracy is among the best in its class, and the integrated temperature sensor enables accurate compensation. I've used this sensor in HVAC control systems with great results. The I2C interface makes integration straightforward - just two wires plus power and ground. The low power consumption is impressive - 0.14µA in sleep mode means you can leave it powered continuously in battery applications without significant drain. One design consideration: the DFN package requires attention to PCB layout for proper thermal coupling. Place the sensor away from heat sources for accurate temperature readings. For humidity sensing, avoid exposing the sensor to condensation - use a protective cover or mesh if necessary. The 14-bit resolution gives you plenty of precision for most control applications. Overall, this is a reliable, accurate sensor that's easy to integrate."
High-accuracy humidity and temperature sensor with I2C interface
— David Wang, BeiLuo
Frequently Asked Questions
How do I interface the HDC1080 with my microcontroller?
Interfacing the HDC1080 humidity and temperature sensor via I2C: (1) Hardware Connection - Connect SDA and SCL to your microcontroller's I2C pins. Use 4.7kΩ pull-up resistors on both lines. Connect VDD (2.7V-5.5V) and GND; (2) I2C Address - The HDC1080 default address is 0x40; (3) Measurement Sequence - Write 0x00 to trigger measurement, wait 6.5ms for conversion, read 4 bytes (2 bytes humidity + 2 bytes temperature); (4) Data Conversion - Humidity = (raw_humidity / 65536) × 100%. Temperature = (raw_temperature / 65536) × 165°C - 40°C; (5) Configuration - Optional: configure measurement resolution and heater via configuration register. The sensor supports standard (100kHz) and fast (400kHz) I2C modes. For continuous monitoring, you can set up automatic measurement mode with programmable intervals. The I2C interface is straightforward and works with any microcontroller that has I2C hardware or bit-banging capability.
Use 4.7kΩ pull-ups on I2C lines. Allow 6.5ms conversion time after triggering measurement. Contact our FAE team for code examples and driver assistance.