Si7005 Datasheet | Silicon Labs

Features - Relative Humidity Sensor - I2C host interface - ± 4.5% RH (maximum @ 0- 80% RH) - Integrated on-chip heater - Temperature Sensor - 4x4 mm QFN package - ±0.5 ºC accuracy (typical) - Excellent long term stability - ±1 ºC accuracy (maximum @ 0 to 70 °C) - 0 to 100% RH operating range - Factory calibrated - - 40 to +85 °C (GM) or 0 to +70 °C operating range (FM) - Optional factory-installed cover - Wide operating voltage range (2.1 to 3.6 V) - Low-profile - Protection during reflow - Excludes liquids and - Low Power Consumption particulates - 240 µA during RH conversion (hydrophobic/oleophobic) Applications - Industrial HVAC/R - Thermostats/humidistats - Respiratory therapy - White goods - Micro-environments/data centers - Automotive climate control and de-fogging - Asset and goods tracking Description The Si7005 is a digital relative humidity and temperature sensor. This monolithic CMOS IC integrates temperature and humidity sensor elements, an analog-to-digital converter, signal processing, calibration data, and an I2C host interface. The patented use of industry-standard, low-K polymeric dielectrics for sensing humidity enables the construction of a low-power, monolithic CMOS sensor IC with low drift and hysteresis and excellent long term stability. Both the temperature and humidity 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 Si7005 is packaged in a 4x4 mm QFN package and is reflow solderable. The optional factory-installed protective cover offers a lowprofile, convenient means of protecting the sensor during assembly (e.g., reflow soldering) and throughout the life of the product, excluding liquids (hydrophobic/oleophobic) and particulates. The Si7005 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring temperature, humidity, and...