www.sensirion.com

version 1.0 – December 2021

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Table of Contents

1 Sensor Performance................................................................................................................................................................3

2 Specifications ..........................................................................................................................................................................5

2.1 Electrical Specifications .....................................................................................................................................................5

2.2 Timing Specifications .........................................................................................................................................................5

2.3 Recommended Operating and Storage Conditions ...........................................................................................................6

2.4 Absolute Minimum and Maximum Ratings.........................................................................................................................7

2.5 Interface Specifications......................................................................................................................................................7

2.6 Environmental Stability ......................................................................................................................................................8

2.7 Material Contents...............................................................................................................................................................8

3 Sensor Output Signal Description .........................................................................................................................................9

3.1 Conditioning.......................................................................................................................................................................9

3.2 Raw Signal Measurement..................................................................................................................................................9

3.3 VOC and NOx Index Measurement..................................................................................................................................10

3.4 Built-in Self-Test...............................................................................................................................................................11

3.5 Reading out The Sensor Serial Number ..........................................................................................................................11

3.6 Sensor Start-up Behavior.................................................................................................................................................11

4 Digital Interface Description .................................................................................................................................................12

4.1 General Considerations ...................................................................................................................................................12

4.2 I2C Address......................................................................................................................................................................12

4.3 I2C Voltage Levels............................................................................................................................................................12

4.4 I2C Protocol Speed...........................................................................................................................................................12

4.5 I2C Sequences .................................................................................................................................................................12

4.6 Checksum Calculation .....................................................................................................................................................13

4.7 I2C Commands.................................................................................................................................................................13

5 Mechanical Specifications....................................................................................................................................................18

5.1 Traceability.......................................................................................................................................................................18

5.2 Package Outline...............................................................................................................................................................18

5.3 Land Pattern ....................................................................................................................................................................19

5.4 Soldering Instructions ......................................................................................................................................................19

6 Ordering Information.............................................................................................................................................................20

6.1 Packaging Information .....................................................................................................................................................20