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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