Contents

1

Block diagram and pin description .................................................2

2

Mechanical and electrical specifications ...........................................3

2.1

Mechanical characteristics ....................................................... 3

2.2

Electrical characteristics......................................................... 4

2.3

Communication interface characteristics ........................................... 5

2.3.1

I²C - inter-IC control interface ............................................... 5

2.4

Absolute maximum ratings....................................................... 6

3

Functionality ......................................................................7

3.1

Sensing element ............................................................... 7

3.2

IC interface.................................................................... 7

3.3

Factory calibration.............................................................. 7

3.4

Device structure ............................................................... 8

3.5

Interpreting pressure readings.................................................... 9

4

Application hints .................................................................10

4.1

Soldering information .......................................................... 11

5

Digital interfaces .................................................................12

5.1

IC serial interface ............................................................. 12

5.2

I²C serial interface ............................................................. 12

5.2.1

I²C operation ........................................................... 13

6

Register map .....................................................................15

7

Register description ..............................................................16

7.1

WHO_AM_I (0Fh) ............................................................. 16

7.2

CTRL_REG1 (10h) ............................................................ 16

7.3

CTRL_REG2 (11h) ............................................................ 18

7.4

RPDS_L (18h) ................................................................ 19

7.5

RPDS_H (19h)................................................................ 19

7.6

RES_CONF (1Ah)............................................................. 19

7.7

STATUS (27h) ................................................................ 20

7.8

PRESS_OUT_XL (28h) ........................................................ 20

LPS33K

Contents

DS12817 - Rev 3

page 27/31