www.sensirion.com / D1

Version 1

– December 2022

2/26

Contents

Features

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

General Description

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

Device Overview

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

Functional Block Diagram

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

Contents

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

1 Humidity and Temperature Sensor Specifications

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

1.1 Relative Humidity

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

1.2 Temperature

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

1.3 Recommended Operating Conditions

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

1.4 ISO17025 certification with 3-point calibration data

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

2 Electrical Specifications

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

2.1 Electrical Characteristics

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

2.2 Timings

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

2.3 Absolute Maximum Ratings

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

3 Pin Assignment

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

3.1 Power Pins (VDD,VSS)

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

3.2 Serial Clock and Serial Data (SCL, SDA)

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

3.3 Die Pad (center pad)

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

3.4 ADDR Pin

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

3.5 ALERT Pin

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

3.6 nRESET Pin

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

4 Sensor Operation

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

4.1 Power-Up and Communication Start

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

4.2 Starting a Measurement

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

4.3 Measurement Commands for Single Shot Data Acquisition Mode

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

4.4 Readout of Measurement Results for Single Shot Mode

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

4.5 Measurement Commands for Periodic Data Acquisition Mode

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

4.6 Readout of Measurement Results for Periodic Mode

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

4.7 ART Command

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4.8 Break command / Stop Periodic Data Acquisition Mode

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

4.9 Reset

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

4.10 Heater

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4.11 Serial Number

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

4.12 Status Register

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4.13 Checksum Calculation

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

4.14 Conversion of Signal Output

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

4.15 Communication Timing

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

5 Physical Specification

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

5.1 Package Description

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