LM75BDP datasheet(37/37 Pages) NXP

37 / 37 page

NXP Semiconductors

LM75B

Digital temperature sensor and thermal watchdog

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 6 February 2015

Document identifier: LM75B

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

20. Contents

General description . . . . . . . . . . . . . . . . . . . . . . 1

Features and benefits . . . . . . . . . . . . . . . . . . . . 1

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ordering information . . . . . . . . . . . . . . . . . . . . . 3

4.1

Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 3

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pinning information . . . . . . . . . . . . . . . . . . . . . . 4

6.1

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

6.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

Functional description . . . . . . . . . . . . . . . . . . . 5

7.1

General operation . . . . . . . . . . . . . . . . . . . . . . . 5

7.2

I2C-bus serial interface . . . . . . . . . . . . . . . . . . . 7

7.2.1

Bus fault time-out . . . . . . . . . . . . . . . . . . . . . . . 7

7.3

Slave address . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7.4

7.4.1

Pointer register . . . . . . . . . . . . . . . . . . . . . . . . . 8

7.4.2

Configuration register . . . . . . . . . . . . . . . . . . . . 8

7.4.3

Temperature register . . . . . . . . . . . . . . . . . . . . 9

7.4.4

Overtemperature shutdown threshold

(Tos) and hysteresis (Thyst) registers. . . . . . . 10

7.5

OS output and polarity . . . . . . . . . . . . . . . . . . 11

7.6

OS comparator and interrupt modes . . . . . . . 11

7.7

OS fault queue . . . . . . . . . . . . . . . . . . . . . . . . 12

7.8

Shutdown mode . . . . . . . . . . . . . . . . . . . . . . . 12

7.9

Power-up default and power-on reset . . . . . . 12

7.10

Protocols for writing and reading the registers 13

Application design-in information . . . . . . . . . 16

8.1

Typical application . . . . . . . . . . . . . . . . . . . . . 16

8.2

LM75A and LM75B comparison . . . . . . . . . . . 16

8.3

Temperature accuracy . . . . . . . . . . . . . . . . . . 17

8.4

Noise effect. . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 19

Recommended operating conditions. . . . . . . 19

Static characteristics . . . . . . . . . . . . . . . . . . . . 20

Dynamic characteristics . . . . . . . . . . . . . . . . . 22

Package outline . . . . . . . . . . . . . . . . . . . . . . . . 23

Soldering of SMD packages . . . . . . . . . . . . . . 27

14.1

Introduction to soldering . . . . . . . . . . . . . . . . . 27

14.2

Wave and reflow soldering . . . . . . . . . . . . . . . 27

14.3

Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 27

14.4

Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 28

Soldering: PCB footprints. . . . . . . . . . . . . . . . 30

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Revision history . . . . . . . . . . . . . . . . . . . . . . . . 34

Legal information . . . . . . . . . . . . . . . . . . . . . . 35

18.1

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 35

18.2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

18.3

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 35

18.4

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Contact information . . . . . . . . . . . . . . . . . . . . 36

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

LM75BDP Datasheet(PDF) 37 Page - NXP Semiconductors

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