TH72005
315MHz
FSK/ASK Transmitter
Document Content
Theory of Operation...................................................................................................3
1
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
Timing Diagrams.............................................................................................................6
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3
4
Pin Definition and Description ..................................................................................7
Electrical Characteristics ..........................................................................................8
4.1
Absolute Maximum Ratings ............................................................................................8
Normal Operating Conditions..........................................................................................8
Crystal Parameters .........................................................................................................8
DC Characteristics..........................................................................................................9
AC Characteristics........................................................................................................10
Output Power Steps......................................................................................................10
4.2
4.3
4.4
4.5
4.6
5
Typical Operating Characteristics..........................................................................11
5.1
5.2
DC Characteristics........................................................................................................11
AC Characteristics........................................................................................................14
6
7
Test Circuit ...............................................................................................................17
6.1 Test circuit component list to Fig. 18.............................................................................17
Package Description................................................................................................18
7.1
7.2
Soldering Information....................................................................................................18
Recommended PCB Footprints.....................................................................................18
8
9
Reliability Information..............................................................................................19
ESD Precautions ......................................................................................................19
10 Disclaimer.................................................................................................................20
3901072005
Rev. 011
Page 2 of 20
Data Sheet
Jul/12
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