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.

Features
■ Relative Humidity Sensor
   •± 4.5% RH (maximum @ 0–80% RH)
■ Temperature Sensor
   •±0.5 ºC accuracy (typical)
   •±1 ºC accuracy (maximum @ 0 to 70 °C)
■ 0 to 100% RH operating range
■ –40 to +85 °C (GM) or 0 to +70 °C operating range (FM)
■ Wide operating voltage range (2.1 to 3.6 V)
■ Low Power Consumption
   •240 µA during RH conversion
■ I2C host interface
■ Integrated on-chip heater
■ 4x4 mm QFN package
■ Excellent long term stability
■ Factory calibrated
■ Optional factory-installed cover
   •Low-profile
   •Protection during reflow
   •Excludes liquids and particulates (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