SCD40-D-R2

Sensirion

-10℃~+60℃ 10.1mm 10.1mm 15mA 2.4V~5.5V 400ppm~2000ppm 6.5mm Air quality I2C Reset function ±5% LGA-20(10.1x10.1) Gas Sensors ROHS

Extended

Datasheetsensirion/SCD40-D-R2

Category: Gas Sensors
Package: LGA-20(10.1x10.1)
Pins: 21

Overview

The SCD40-D-R2 is a gas Sensor made by Sensirion in a LGA-20(10.1x10.1) package with 21 pins. -10℃~+60℃ 10.1mm 10.1mm 15mA 2.4V~5.5V 400ppm~2000ppm 6.5mm Air quality I2C Reset function ±5% LGA-20(10.1x10.1) Gas Sensors ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:SCD41-D-R2, from EasyEDA) and its footprint (JLCPCB:Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mm, from Cdfer), ready for a KiCad board. 2,381 are in stock at JLCPCB (part C3659421). 30 open-source boards in 28 repositories on GitHub use it.

Symbol

EasyEDA_Cloud:SCD41-D-R2From EasyEDA

Footprint

JLCPCB:Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mmFrom Cdfer

From the datasheet

Supply, least: 2.4 V · VDD, recommended operating min · p. 4
Supply, most: 5.5 V · VDD, recommended operating max · p. 4
Supply, absolute maximum: 6 V · VDD, absolute max · p. 4
Works from: -10 °C · Operating temperature min · p. 4
Works up to: 60 °C · Operating temperature max · p. 4
Takes working: 15 mA · Combined VDD and VDDH, periodic measurement every 5 seconds, VDD = 3.3 V, typical · p. 4
Takes working: 11 mA · Combined VDD and VDDH, periodic measurement every 5 seconds, VDD = 5 V, typical · p. 4
Takes at most: 205 mA · Combined VDD and VDDH peak supply current, VDD = 3.3 V, max · p. 4
Takes at most: 137 mA · Combined VDD and VDDH peak supply current, VDD = 5 V, max · p. 4

What it is and has

Sensing technology: Photoacoustic NDIR, PASens® · p. 1
Interface: I2C · p. 1
Integrated sensors: Temperature and humidity · p. 1

Around it

res 10 kΩ: between SCL and VDD; External pull-up; example value. Size for bus capacitance and communication frequency. · p. 5

Specifications

Parameter	Conditions	As printed	Page
Supply voltage DC VDD	Supply voltage must be kept constant for stable sensor operation; typical 3.3 V or 5.0 V	min 2.4 · max 5.5 V	4
Voltage ripple peak to peak VRPP	Supply voltage without the load of the sensor	max 30 mV	4
Peak supply current Ipeak	VDD = 3.3 V; sustained current	typ 175 · max 205 mA	4
Peak supply current Ipeak	VDD = 5 V; sustained current	typ 115 · max 137 mA	4
Average supply current for periodic measurement mode, 1 measurement every 5 seconds IDD	VDD = 3.3 V	typ 15 · max 18 mA	4
Average supply current for periodic measurement mode, 1 measurement every 5 seconds IDD	VDD = 5 V	typ 11 · max 13 mA	4
Average supply current for low power periodic measurement mode, 1 measurement every 30 seconds IDD	VDD = 3.3 V	typ 3.2 · max 3.5 mA	4
Average supply current for low power periodic measurement mode, 1 measurement every 30 seconds IDD	VDD = 5 V	typ 2.8 · max 3 mA	4
Output low level voltage VOL	3 mA sink current	max 0.66 V	4
Temperature operating conditions		min -10 · max 60 °C	4
Humidity operating conditions	Non-condensing	min 0 · max 95 %RH	4
DC supply voltage		min -0.3 · max 6 V	4
Max voltage on pins SDA, SCL, GND		min -0.3 V	4
Input current on pins SDA, SCL, GND		min -280 · max 100 mA	4
Short term storage temperature	Temporary conditions during e.g., transport	min -40 · max 70 °C	4
Recommended storage temperature		min 10 · max 50 °C	4

Parameters

Current - Supply: 15mA
Current - Supply(Max): 205mA
Features: Reset function
Height: 6.5mm
Interface: I2C
Length: 10.1mm
Measurement Range: 400ppm~2000ppm
Operating Temperature: -10℃~+60℃
Tolerance: ±5%
Type: Air quality
Voltage - Supply: 2.4V~5.5V
Voltage - Supply(Absolute Max): 6V
Width: 10.1mm

Order codes

SCD40-D-R2LCSC C3659421

Pinout

The pins of the SCD40-D-R2
Pin	Name	Type
1	DNC	Unspecified
2	DNC	Unspecified
3	DNC	Unspecified
4	DNC	Unspecified
5	DNC	Unspecified
6	GND	Unspecified
7	VDD	Unspecified
8	DNC	Unspecified
9	SCL	Unspecified
10	SDA	Unspecified
11	DNC	Unspecified
12	DNC	Unspecified
13	DNC	Unspecified
14	DNC	Unspecified
15	DNC	Unspecified
16	DNC	Unspecified
17	DNC	Unspecified
18	DNC	Unspecified
19	VDDH	Unspecified
20	GND	Unspecified
21	GND	Unspecified

Open-source boards using it

All 30

2 layers50 × 50 mm
Bf-021
smoca-ag/m5stack_co2_sensor
Build your own portable, graphing CO₂ sensor
12 parts49
4 layers13.6 × 19.4 mm
MiniCO2
nup002/miniCO2
A miniature USB CO2 sensor
25 parts40
4 layers100 × 75 mm
OpenAirScope
emertcakir/OpenAirScope
Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.
282 parts26MIT
2 layers10.3 × 17 mm
Watchy scd40
cscott/watchy-co2-pcb
Simple PCB to mount the Sensirion SCD40 CO2 sensor next to Watchy
12 parts13
2 layers42.4 × 94 mm
SoWeSta
wir-mo/SoWeSta
Solar powered Weather Station using an ESP32-C3
106 parts7
2 layers106 × 58.5 mm
CO2 Monitor SMD
romkey/pdxhackerspace-portable-co2-monitor
Open source hardware and software portable CO2/air quality monitor
28 parts3MIT
2 layers95.3 × 34 mm
GasSensor
Daniel-Abdi/Matter-CO2-AirQuality-Sensor
Create an ESP32-C6 based air quality sensor for Matter. Grab CO2 concentration in real time and update in any Matter compatible app.
22 parts2
4 layers19.8 × 50.9 mm
Zigbee air quality monitor
nobodyguy/zigbee_air_quality_monitor_hardware
Opensource HA compatible air quality monitor with CO2, temperature and humidity measurements
35 parts2Apache-2.0

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Questions

Is there a KiCad symbol and footprint for the SCD40-D-R2?

Yes. The symbol is EasyEDA_Cloud:SCD41-D-R2 and the footprint JLCPCB:Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the SCD40-D-R2?

LGA-20(10.1x10.1), with 21 pins. Its footprint is drawn on this page.

Where is the SCD40-D-R2 datasheet?

Sensirion publishes it: the Datasheet link on this page opens it.

Where can I order the SCD40-D-R2?

JLCPCB lists it as part C3659421, with 2,381 in stock; the sellers' links on this page open their listings.

Which open-source boards use the SCD40-D-R2?

30 boards in 28 repositories on GitHub; the most starred are listed on this page, with their KiCad files.