www.sensirion.com
Version 1.1
–
April 2021
1/22
▪
High accuracy: ±(40 ppm + 5 %)
▪
Digital I
2
C interface
▪
Integrated temperature and humidity sensor
▪
Low power operation down to < 0.4 mA avg.
@ 5 V, 1 meas. / 5 minutes
SCD4x
Breaking the size barrier in CO
2
sensing
Products
Details
SCD40-D-R2 Base accuracy, specified range
400
–
2’000
ppm
SCD41-D-R2 High accuracy, specified range
400
–
5’000
ppm, single shot
mode supported
Full product list on page 21
Functional Block Diagram
Device Overview
Product Summary
The SCD4x is
Sensirion’s next generation miniature CO
2
sensor. This sensor builds on the photoacoustic sensing
principle and Sensirion’s patented PAsens
® and
CMOSens® technology to offer high accuracy at an
unmatched price and smallest form factor. SMD assembly
allows cost- and space-effective integration of the sensor
combined with maximal freedom of design. On-chip signal
compensation is realized with the build-in SHT4x humidity
and temperature sensor.
CO
2
is a key indicator for indoor air quality as high levels
compromise
humans’ cognitive low power
and well-being. The SCD4x enables smart ventilation
systems to regulate ventilation in the most energy-efficient
and human-friendly way. Moreover, indoor air quality
monitors and other connected devices based on the
SCD4x can help maintaining low CO
2
concentration for a
healthy, productive environment.
Features
▪
Photoacoustic sensor technology PASens®
▪
Smallest form factor: 10.1 x 10.1 x 6.5 mm
3
▪
Reflow solderable for cost effective assembly
▪
Large output range: 0 ppm
–
40’000 ppm
▪
Large supply voltage range: 2.4
–
5.5 V
