TH72036
868/915MHz
FSK/ASK Transmitter
Document Content
1
Theory of Operation...................................................................................................3
1.1
1.2
General............................................................................................................................. 3
Block Diagram .................................................................................................................. 3
2
Functional Description ..............................................................................................3
2.1
Crystal Oscillator .............................................................................................................. 3
FSK Modulation................................................................................................................ 4
Crystal Pulling................................................................................................................... 4
ASK Modulation................................................................................................................ 5
Output Power Selection.................................................................................................... 5
Lock Detection.................................................................................................................. 5
Low Voltage Detection...................................................................................................... 5
Mode Control Logic .......................................................................................................... 6
Clock Output..................................................................................................................... 6
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10 Timing Diagrams .............................................................................................................. 6
Pin Definition and Description..................................................................................7
Electrical Characteristics ..........................................................................................8
3
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
Absolute Maximum Ratings.............................................................................................. 8
Normal Operating Conditions ........................................................................................... 8
Crystal Parameters........................................................................................................... 8
DC Characteristics............................................................................................................ 9
AC Characteristics.......................................................................................................... 10
AC Characteristics.......................................................................................................... 11
Output Power Steps – ASK Mode .................................................................................. 11
5
6
Test Circuit ...............................................................................................................12
5.1
Test circuit component list to Fig. 6................................................................................ 12
Package Description................................................................................................13
6.1
6.2
Soldering Information ..................................................................................................... 13
Recommended PCB Footprints...................................................................................... 13
7
8
9
Reliability Information..............................................................................................14
ESD Precautions ......................................................................................................14
Disclaimer.................................................................................................................16
3901072036
Rev. 005
Page 2 of 16
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
