AIS2IH datasheet(57/63 Pages) STMICROELECTRONICS

57 / 63 page

Contents

Block diagram and pin description .................................................3

1.1

Block diagram ................................................................. 3

1.2

Pin description ................................................................. 4

Mechanical and electrical specifications ...........................................6

2.1

Mechanical characteristics ....................................................... 6

2.2

Electrical characteristics......................................................... 7

2.3

Temperature sensor characteristics ............................................... 8

2.4

Communication interface characteristics ........................................... 9

2.4.1

SPI - serial peripheral interface .............................................. 9

2.4.2

I²C - inter-IC control interface .............................................. 10

2.5

Absolute maximum ratings...................................................... 11

Terminology and functionality ....................................................12

3.1

Terminology .................................................................. 12

3.1.1

Sensitivity ............................................................. 12

3.1.2

Zero-g level offset ....................................................... 12

3.2

Functionality.................................................................. 13

3.2.1

Operating modes ....................................................... 13

3.2.2

Single data conversion on-demand mode ..................................... 15

3.2.3

Self-test............................................................... 15

3.2.4

Activity/Inactivity, stationary/motion detection functions........................... 16

3.2.5

High tap/double-tap user configurability ...................................... 16

3.2.6

Offset management...................................................... 16

3.3

Sensing element .............................................................. 16

3.4

IC interface................................................................... 16

3.5

Factory calibration............................................................. 17

3.6

Temperature sensor ........................................................... 17

Application hints .................................................................18

Digital main blocks ...............................................................20

5.1

Block diagram of filters ......................................................... 20

5.2

Data stabilization time vs. ODR/device setting ..................................... 21

AIS2IH

Contents

DS12421 - Rev 4

page 57/63

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