SI7021 INDUSTRIAL HIGH PRECISION 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

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

The Si7021 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring humidity, dew-point, and temperature, in applications ranging from HVAC/R and asset tracking to industrial and consumer platforms

Features:

• • 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
  • Factory-calibrated
  • I2C Interface
  • Integrated on-chip heater
  • 3×3 mm DFN Package
  • Excellent long term stability
  • Optional factory-installed cover
  • Low-profile
  • Protection during reflow
  • Excludes liquids and particulates

Applications:

• HVAC/R
• Thermostats/humidistats
• Respiratory therapy
• White goods
• Indoor weather stations
• Micro-environments/data centers
• Automotive climate control and defogging
• Asset and goods tracking
• Mobile phones and tablets