S2-LPS datasheet(68/73 Pages) STMICROELECTRONICS

68 / 73 page

Contents

Detailed functional description.....................................................3

Typical application diagram and pin description....................................5

2.1

Pin diagram ................................................................... 8

2.2

Pin description ................................................................. 8

Specifications ....................................................................10

3.1

Absolute maximum ratings...................................................... 10

3.2

Operating range .............................................................. 10

3.3

Thermal properties ............................................................ 10

3.4

Power consumption ........................................................... 10

3.5

General characterization ....................................................... 12

3.6

Frequency synthesizer ......................................................... 12

3.7

Crystal oscillator .............................................................. 12

3.8

RF receiver .................................................................. 13

3.8.1

Blocking and selectivity at 433 MHz ......................................... 14

3.8.2

Sensitivity at 433 MHz.................................................... 14

3.8.3

Blocking and selectivity at 840-868 MHz ...................................... 14

3.8.4

Sensitivity at 840-868 MHz ................................................ 15

3.9

RF transmitter ................................................................ 15

3.9.1

Harmonic emission at 433 MHz ............................................ 16

3.9.2

Harmonic emission at 840-868 MHz ......................................... 16

3.10

Digital interface specification .................................................... 16

3.11

Battery indicator .............................................................. 17

Block description .................................................................18

4.1

Power management ........................................................... 18

4.2

Power-On-Reset .............................................................. 19

4.3

RF synthesizer................................................................ 20

4.3.1

RF channel frequency settings ............................................. 21

4.4

Digital modulator .............................................................. 22

4.4.1

Frequency modulation.................................................... 22

4.4.2

Amplitude modulation .................................................... 23

S2-LPS

Contents

DS13831 - Rev 1

page 68/73

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