www.sensirion.com / D1

Version 4

– December 2022

2/24

Contents

Features

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

General Description

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

Device Overview

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

Functional Block Diagram

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

Contents

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

1 Sensor Performance

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

1.1 Temperature

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

1.2 ISO17025 certification with 3-point calibration data

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

2 Electrical Specifications

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

2.1 Electrical Characteristics

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

2.2 Timings

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

2.3 Absolute Maximum Ratings

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

3 Pin Assignment

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

3.1 Power Pins (VDD, VSS)

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

3.2 Serial Clock and Serial Data (SCL, SDA)

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

3.3 Die Pad (center pad)

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

3.4 ADDR Pin

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

3.5 ALERT Pin

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

3.6 nRESET Pin

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

4 Operation and Communication

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

4.1 Power-Up and Communication Start

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

4.2 Starting a Measurement

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

4.3 Measurement Commands for Single Shot Data Acquisition

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

4.4 Readout of Measurement Results for Single Shot Method

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

4.5 Measurement Commands for Periodic Data Acquisition Mode

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

4.6 Readout of Measurement Results for Periodic Mode

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

4.7 Break command/ Stop Periodic Data Acquisition Mode

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

4.8 Reset

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4.9 Heater

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

4.10 Status Register

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

4.11 Serial Number

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

4.12 Checksum Calculation

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

4.13 Conversion Signal Output

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

4.14 Communication Timing

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

5 Packaging

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

5.1 Traceabilty

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

5.2 Package Outline

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

5.3 Land Pattern

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

6 Shipping Package

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