Temperature and Humidity 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.

Output: Temperature in Celsius (°C) and Relative Humidity in (%)

Datasheet: Si7021

Download sensor codes and libraries

Features and technical specifications:

  • 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