www.sensirion.com / D1

Version 2

– July 2021

2/17

Contents

Features

........................................................................................................................................................................1

General Description

...................................................................................................................................................1

Device Overview

.........................................................................................................................................................1

Functional Block Diagram

........................................................................................................................................1

1 Quick Start

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

2 Humidity and Temperature Sensor Specifications

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

2.1 Relative Humidity

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

2.2 Temperature

.....................................................................................................................................................5

2.3 Recommended Operating Conditions

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

3 Electrical Specifications

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

3.1 Electrical Characteristics

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

3.2 Timings

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

3.3 Absolute Maximum Ratings

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

4 Sensor Operation

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

4.1 I2C communication

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

4.2 Data type & length

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

4.3 Checksum Calculation

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

4.4 Command Overview

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

4.5 Conversion of Signal Output

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

4.6 Serial number

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

4.7 Reset & Abort

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

4.8 Heater Operation

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

5 Physical Specification

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

5.1 Package Description

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

5.2 Package Outline

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

5.3 Land Pattern

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

5.4 Pin Assignment & Laser Marking

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

5.5 Thermal Information

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

6 Quality and Material Contents

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

7 Tape and Reel Packaging

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

8 Product Name Nomenclature

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

9 Ordering Information

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

10 Bibliography

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

11 Revision History

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