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Product Descriptions

The Si7021 I2C 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 an I2C Interface. 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 Si7021 is available in a 3x3 mm DFN package and is reflow solderable. It can be used as a hardware- and software-compatible 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 liquids (hydrophobic/oleophobic) and particulates.

The Si7021 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring humidity, dew-point, and temperature, in 

applications ranging from HVAC/R and asset tracking to industrial and consumer platforms.

Product Features

? Precision Relative Humidity Sensor

  ? ± 3% RH (max), 0–80% RH

? High Accuracy Temperature Sensor

  ?±0.4 °C (max), –10 to 85 °C

? 0 to 100% RH operating range

? Up to –40 to +125 °C operating range

? Wide operating voltage (1.9 to 3.6 V)

? Low Power Consumption

  ?150 μA active current

  ?60 nA standby current

? Factory-calibrated

? I2C Interface

? Integrated on-chip heater

? 3x3 mm DFN Package

? Excellent long term stability

? Optional factory-installed cover

  ?Low-profile

  ?Protection during reflow

  ?Excludes liquids and particulates

Product 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

Product Images

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

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