TH72005 Datasheet, PDF (2/20 Pages) Melexis Microelectronic Systems – 315MHz FSK/ASK Transmitter

TH72005
315MHz
FSK/ASK Transmitter
Document Content
1 Theory of Operation ...................................................................................................3
1.1 General ............................................................................................................................ 3
1.2 Block Diagram ................................................................................................................. 3
2 Functional Description ..............................................................................................3
2.1 Crystal Oscillator.............................................................................................................. 3
2.2 FSK Modulation ............................................................................................................... 4
2.3 Crystal Pulling.................................................................................................................. 4
2.4 ASK Modulation ............................................................................................................... 5
2.5 Output Power Selection ................................................................................................... 5
2.6 Lock Detection ................................................................................................................. 5
2.7 Low Voltage Detection..................................................................................................... 5
2.8 Mode Control Logic.......................................................................................................... 6
2.9 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
7.2 Recommended PCB Footprints ..................................................................................... 18
8 Reliability Information..............................................................................................19
9 ESD Precautions ......................................................................................................19
10 Disclaimer .................................................................................................................20
39010 72005
Rev. 008
Page 2 of 20
Data Sheet
June/07