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SI7022-A20 Datasheet, PDF (1/25 Pages) Silicon Laboratories – HUMIDITY/TEMPERATURE SENSOR WITH PWM OUTPUT | |||
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Si7022-A20
H U M I D I T Y/ TE M P E R A T U R E S E N S O R W I T H P W M O U T P U T
Features
ï® Precision Relative Humidity Sensor ï® Factory-calibrated
ï¬ï ± 4% RH (max), 0â80% RH
ï® PWM Output
ï® High Accuracy Temperature Sensor ï® 3x3 mm DFN Package
ï¬ï ±0.4 °C (max), â10 to 85 °C
ï® Excellent long term stability
ï® 0 to 100% RH operating range
ï® Optional factory-installed cover
ï® â40 to +125 °C operating range
ï¬ï Low-profile
ï® Wide operating voltage
ï¬ï Protection during reflow
(1.9 to 3.6 V)
ï¬ï Excludes liquids and particulates
ï® Low Power Consumption
Applications
ï® HVAC/R
ï® Thermostats/humidistats
ï® Respiratory therapy
ï® White goods
ï® Indoor weather stations
ï® Micro-environments/data centers
ï® Automotive climate control and
defogging
ï® Asset and goods tracking
ï® Mobile phones and tablets
Ordering Information:
See page 18.
Pin Assignments
Description
The Si7022 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 a PWM output. The PWM
output may be filtered to produce an analog voltage output. 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 Si7022 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 Si7022 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.
Top View
Patent Protected. Patents pending
Rev. 1.1 6/15
Copyright © 2015 by Silicon Laboratories
Si7022-A20
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