www.sensirion.com / D1

Version 4

– November 2022

2/22

Contents

Features

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

General Description

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

Device Overview

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

Functional Block Diagram

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

Contents

..................................................................................................................................................................................2

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

2.4 ISO17025 certification with 3-point calibration data

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

3 Electrical Specifications

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

3.1 Electrical Characteristics

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

3.2 Timings

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

3.3 Absolute Maximum Ratings

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

4 Sensor Operation

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

4.1 I2C communication

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

4.2 I2C Communication Timing

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

4.3 Data type & length

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

4.4 Checksum Calculation

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

4.5 Command Overview

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

4.6 Conversion of Signal Output

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

4.7 Serial number

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

4.8 Reset & Abort

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

4.9 Heater Operation

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

5 Physical Specification

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

5.1 Package Description

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

5.2 Package Outline

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

5.3 Land Pattern

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

5.4 Pin Assignment & Laser Marking

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

5.5 Thermal Information

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

6 Protection Options

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

6.1 Membrane Option

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

6.2 Protective Cover

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

7 Quality and Material Contents

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

8 Tape and Reel Packaging

...........................................................................................................................................18

9 Product Name Nomenclature

.....................................................................................................................................19

10 Ordering Information

...................................................................................................................................................20

11 Bibliography

...................................................................................................................................................................20

12 Revision History

............................................................................................................................................................21