www.sensirion.com / D1

Version 3

– April 2022

2/18

Contents

1 Quick Start

– Hello World .....................................................................................................................................3

2 Humidity and Temperature Sensor Specifications

.......................................................................................4

2.1 Relative Humidity

............................................................................................................................................4

2.2 Temperature

.....................................................................................................................................................6

2.3 Recommended Operating Conditions

......................................................................................................7

3 Electrical Specifications

........................................................................................................................................8

3.1 Electrical Characteristics

..............................................................................................................................8

3.2 Timings

...............................................................................................................................................................9

3.3 Absolute Maximum Ratings

.........................................................................................................................9

4 Sensor Operation

..................................................................................................................................................10

4.1 I2C communication

.......................................................................................................................................10

4.2 I2C Communication Timing

.......................................................................................................................10

4.3 Data type & length

........................................................................................................................................10

4.4 Checksum Calculation

.................................................................................................................................10

4.5 Command Overview

....................................................................................................................................11

4.6 Conversion of Signal Output

.....................................................................................................................11

4.7 Serial number

.................................................................................................................................................12

4.8 Reset & Abort

.................................................................................................................................................12

4.9 Heater Operation

...........................................................................................................................................12

5 Physical Specification

..........................................................................................................................................13

5.1 Package Description

....................................................................................................................................13

5.2 Package Outline

............................................................................................................................................13

5.3 Land Pattern

...................................................................................................................................................13

5.4 Pin Assignment & Laser Marking

.............................................................................................................14

5.5 Thermal Information

.....................................................................................................................................15

6 Quality and Material Contents

...........................................................................................................................15

7 Tape and Reel Packaging

..................................................................................................................................15

8 Product Name Nomenclature

............................................................................................................................16

9 Ordering Information

............................................................................................................................................16

10 Bibliography

..........................................................................................................................................................17

11 Revision History

..................................................................................................................................................17