SI7022 Datasheet | Silicon Labs

Features - Precision Relative Humidity Sensor - Factory-calibrated -  ± 4% RH (max), 0- 80% RH - PWM Output - High Accuracy Temperature Sensor - 3x3 mm DFN Package - ±0.4 °C (max), - 10 to 85 °C - Excellent long term stability - 0 to 100% RH operating range - Optional factory-installed cover - - 40 to +125 °C operating range - Low-profile - Wide operating voltage - Protection during reflow (1.9 to 3.6 V) - Excludes liquids and particulates - Low Power Consumption 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 Ordering Information: See page 18. Pin Assignments Description The Si7022 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 a PWM output. The PWM output may be filtered to produce an analog voltage output. 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 Si7022 is available in a 3x3 mm DFN package and is reflow solderable. It can be used as a hardware- and software-patible drop-in upgrade for existing RH/ temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing over a wider range and lower power consumption. The optional factory-installed cover offers a low profile, convenient means of protecting the sensor during assembly (e.g., reflow soldering) and throughout the life of the product, excluding...