Silicon Labs' Si7005 is a highly integrated, digital relative humidity (RH) and temperature sensor that interfaces to its host via the I²C bus. It is very low-power, and the only external BOM is a pair of bypass capacitors. Each device is factory calibrated, removing the need for customer calibration, and the devices are completely interchangeable. The Si7005 is packaged in an open-cavity, 4 mm x 4 mm QFN package to expose the moisture-sensing polymer film. A convenient, low-profile protective cover is available as an option.