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Si7021 temperature-humidity sensor + extras

SKU: GY-21
8.90 €
Stock status: 13
Delivery: 1-3 Days

The Si7021 I2C Humidity and Temperature Sensor is a monolithic CMOS IC integrating humidity and temperature sensor elements, an analog-to-digital converter, signal processing, calibration data, and an I2C Interface. The patented use of industry-standard, low-K polymeric dielectrics for sensing humidity enables the construction of low-power, monolithic CMOS Sensor ICs with low drift and hysteresis, and excellent long term stability

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The Si7021 I2C Humidity and Temperature Sensor is a monolithic CMOS IC integrating humidity and temperature sensor elements, an analog-to-digital converter, signal processing, calibration data, and an I2C Interface. The patented use of industry-standard, low-K polymeric dielectrics for sensing humidity enables the construction of low-power, monolithic CMOS Sensor ICs with low drift and hysteresis, and excellent long term stability


The humidity and temperature sensors are factory-calibrated and the calibration data is stored in the on-chip non-volatile memory. This ensures that the sensors are fully interchangeable, with no recalibration or software changes required

Size: 1.3*1cm
Precision Relative Humidity Sensor
± 3% RH (max), 0-80% RH
High Accuracy Temperature Sensor
±0.4 °C (max), -10 to 85 °C
0 to 100% RH operating range
Up to -40 to +125 °C operating range
Wide operating voltage (1.9 to 3.6 V)
Low Power Consumption 4m A active current
60 nA standby current
Factory-calibrated
I2C InterfaceIntegrated on-chip heater
3x3 mm DFN PackageExcellent long term stability