TH72031_12 Datasheet, PDF (2/20 Pages) Melexis Microelectronic Systems – FSK Transmitter

TH72031
868/915MHz
FSK Transmitter
Document Content
1 Theory of Operation ...................................................................................................3
1.1 General .............................................................................................................................. 3
1.2 Block Diagram.................................................................................................................... 3
2 Functional Description ..............................................................................................4
2.1 Crystal Oscillator ................................................................................................................ 4
2.2 FSK Modulation ................................................................................................................. 4
2.3 Crystal Pulling .................................................................................................................... 4
2.4 Output Power Selection...................................................................................................... 5
2.5 Lock Detection ................................................................................................................... 5
2.6 Low Voltage Detection ....................................................................................................... 5
2.7 Mode Control Logic ............................................................................................................ 6
2.8 Timing Diagrams ................................................................................................................ 6
3 Pin Definition and Description ..................................................................................7
4 Electrical Characteristics ..........................................................................................8
4.1 Absolute Maximum Ratings................................................................................................ 8
4.2 Normal Operating Conditions ............................................................................................. 8
4.3 Crystal Parameters ............................................................................................................ 8
4.4 DC Characteristics ............................................................................................................. 9
4.5 AC Characteristics ........................................................................................................... 10
4.6 Output Power Steps ......................................................................................................... 10
5 Typical Operating Characteristics ..........................................................................11
5.1 DC Characteristics ........................................................................................................... 11
5.2 AC Characteristics ........................................................................................................... 14
6 Test Circuit ...............................................................................................................17
6.1 Test circuit component list to Fig. 18 ................................................................................ 17
7 Package Description ................................................................................................18
7.1 Soldering Information ....................................................................................................... 18
8 Standard information regarding manufacturability of Melexis products with
different soldering processes .................................................................................19
9 ESD Precautions ......................................................................................................19
10 Disclaimer .................................................................................................................20
3901072031
Rev. 012
Page 2 of 20
Data Sheet
Jun/12