SI7022-A10 Datasheet, PDF (1/25 Pages) Silicon Laboratories – Optional factory-installed cover

Si7022-A10
HUMIDITY/TEMPERATURE SENSOR WITH PWM OUTPUT
Features
 Precision Relative Humidity Sensor  Factory-calibrated
 ± 4% RH (max), 0–80% RH
 PWM Output
 High Accuracy Temperature Sensor  3x3 mm DFN Package
±0.4 °C (max), –10 to 85 °C
 Excellent long term stability
 0 to 100% RH operating range
 Optional factory-installed cover
 –40 to +125 °C operating range
Low-profile
 Wide operating voltage
Protection during reflow
(1.9 to 3.6 V)
Excludes liquids and particulates
 Low Power Consumption
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
Si7022
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
PWM1 1
GND 2
DNC 3
6 SELECT
5 VDD
4 PWM2
Patent Protected. Patents pending
Rev. 1.1 6/15
Copyright © 2015 by Silicon Laboratories
Si7022-A10