S2-LPQTR datasheet(2/90 Pages) STMICROELECTRONICS

2 / 90 page

Contents

S2-LP

2/90

DocID029944 Rev 1

Contents

Description....................................................................................... 8

Detailed functional description ...................................................... 9

Typical application diagram and pin description........................ 11

3.1

Pin diagram ..................................................................................... 13

3.2

Pin description................................................................................. 13

Specifications ................................................................................ 15

4.1

Absolute maximum ratings .............................................................. 15

4.2

Operating range .............................................................................. 15

4.3

Thermal properties .......................................................................... 15

4.4

Power consumption......................................................................... 16

4.5

General characterization ................................................................. 17

4.6

Frequency synthesizer .................................................................... 18

4.7

Crystal oscillator.............................................................................. 18

4.8

RF receiver...................................................................................... 19

4.8.1

Blocking and selectivity at 433 MHz ................................................. 20

4.8.2

Sensitivity at 433 MHz ...................................................................... 21

4.8.3

Blocking and selectivity at 868 MHz ................................................. 21

4.8.4

Sensitivity at 868 MHz ...................................................................... 22

4.8.5

Blocking and selectivity at 920 MHz ................................................. 22

4.8.6

Sensitivity at 920 MHz ...................................................................... 23

4.9

RF transmitter ................................................................................. 23

4.9.1

Harmonic emission at 433 MHz ....................................................... 24

4.9.2

Harmonic emission at 868 MHz ....................................................... 24

4.9.3

Harmonic emission at 915 MHz ....................................................... 25

4.10

Digital interface specification........................................................... 25

4.11

Battery indicator .............................................................................. 26

Block description .......................................................................... 27

5.1

Power management ........................................................................ 27

5.2

Power On Reset.............................................................................. 28

5.3

RF synthesizer ................................................................................ 29

5.3.1

RF channel frequency settings ......................................................... 30

5.4

Digital modulator ............................................................................. 31

5.4.1

Frequency modulation ...................................................................... 31

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