SI7021 HUMIDITY AND TEMPERATURE SENSOR
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.
- 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
- 150 µA active current
- 60 nA standby current
- I2C Interface
- Integrated on-chip heater