SCD40 overview
SCD40 is a component documented by Sensirion AG Switzerlan. The PDF description identifies it as "Breaking the size barrier in CO2 sensing Version 1.1 - April 2021." This guide condenses the most useful engineering information from the available PDF so that designers and sourcing teams can identify the checks that still need confirmation in the original document.
Datasheet snapshot
- Manufacturer: Sensirion AG Switzerlan...
- Part number: SCD40
- Category: IC
- Datasheet length: 22 Pages
Specifications and operating details
The following points were extracted from the PDF text. Check the associated conditions, notes and limits in the complete document before using a value in a design.
- Accuracy is based on tests with gas mixtures having a tolerance of ± 1.5%.
- Units Supply voltage DC VDD 2.4 3.3 or 5.0 5.5 V Voltage ripple peak to peak VRPP 30 mV Peak supply current6 VDD = 3.3 V 175 205 mA VDD = 5 V 115 137 mA Average supply current for periodic measurement, periodic measurement IDD VDD = 3.3 V.
- Parameter Conditions Value Temperature operating conditions -10 – 60°C Humidity operating conditions8 Non-condensing 0 – 95 %RH MSL Level 3 DC supply voltage - 0.3 V – 6.0 V Max voltage on pins SDA, SCL, GND – 0.3 V to VDD+0.3 V Input curr.
- Name Comments VDD Supply voltage VDDH Supply voltage IR source, must be connected to VDD on customer PCB GND Ground contact SDA I2C Serial data, bidirectional SCL I2C Serial clock DNC Do not connect, pads must be soldered to a floating pad.
- Care should be taken to choose a low noise power supply (preferably a low -dropout regulator, LDO, with output ripple of less than 30 mV p-p), which is adequately dimensioned for the relatively large peak currents.
- For dimensioning resistor sizes please take bus capacity and communication frequency into account (see example in Section 7.1 of NXPs I 2C Manual for more details 10).
- Unit Power-up time After hard reset, VDD ≥ 2.25 V - 1000 ms Soft reset time After re-initialization (i.e.
Topics covered by the datasheet
The document includes sections related to:
- Features
Engineering review checklist
- Confirm the exact ordering code, package, pinout or terminal arrangement and document revision.
- Compare recommended operating conditions with absolute maximum ratings and retain adequate design margin.
- Validate electrical, thermal, mechanical and environmental behavior in the final application.
Always confirm values against the latest manufacturer-controlled datasheet, especially when qualifying a substitute or releasing a production BOM.
View the complete PDF and model record
Open the SCD40 datasheet and model details to review the complete PDF, document pages and available product information.
Source attribution
Adapted from the PDF associated with this DigiCamel model page.
Source model URL: https://www.digicamel.com/product.php?slug=scd40-sensirion-ag-switzerlan