Sensirion SHT40 Temperature & Humidity Sensor I2C DFN
High-accuracy SHT40 sensor for humidity (±1.8% RH) & temp (±0.2°C), I2C, DFN, 1.08V-3.6V.
The Sensirion SHT40-AD1B-R2 is a high-accuracy digital sensor platform for measuring relative humidity and temperature in demanding environments. Designed for surface mount technology (SMT) processing, its four-pin dual-flat-no-leads (DFN) package ensures reliable integration into compact electronic assemblies.
With a relative humidity accuracy of up to ±1.5 %RH and a temperature accuracy of up to ±0.1 °C, the sensor delivers precise data for critical applications. It operates across a supply voltage range of 1.08V to 3.6V and consumes an ultra-low average current of 0.4µA (at a measurement rate of 1Hz), making it ideal for battery-powered devices. The idle current is a mere 80nA, further extending battery life.
The I2C interface supports fast mode plus and includes a CRC checksum for data integrity. Multiple preconfigured I2C addresses allow flexible system design. The internal power-trimmed heater offers three heating levels, enabling reliable operation in condensing or demanding conditions. The sensor is fully functional across 0 to 100 %RH and -40 to 125 °C, and features NIST traceability for measurement confidence.
Key Specifications:
- Humidity range: 0% to 100% relative humidity
- Humidity accuracy: ±1.8% RH
- Temperature accuracy: ±0.2°C
- Response time: 8s (RH), 2s (temperature)
- Interface: I2C fast mode plus, CRC checksum
- Package: DFN, 4 pins
- Supply voltage: 1.08V to 3.6V
This sensor is well-suited for HVAC, weather stations, and industrial monitoring systems requiring precise and low-power environmental sensing.
- HVAC systems
- Weather stations
- Industrial environmental monitoring
- Battery-powered devices requiring low power consumption
- Humidity Range: 0% to 100% Relative Humidity
- Humidity Accuracy: ±1.8% RH
- Temperature Accuracy: ±0.2°C
- RH Response Time: 8s
- Temperature Response Time: 2s
- Sensor Interface Type: I2C
- Sensor Output Type: Digital
- Sensor Case Style: DFN
- No. of Pins: 4 pins
- Operating Temperature Min: -40°C
- Operating Temperature Max: 125°C
- Supply Voltage Min: 1.08V
- Supply Voltage Max: 3.6V
- Product Range: SHT4x Series
- Average Current: 0.4µA (at measurement rate 1Hz)
- Idle Current: 80nA
- Fully functional in condensing environment
- Variable power heater
- NIST traceability
- of Pins: 4Pins
- SVHC: No SVHC (12-Jan-2017)
Always follow local regulations and product guidance.
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
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