TH7108

868/915MHz

FSK/FM/ASK Transmitter

3901007108

Page 2 of 14

Data Sheet

Rev. 008

May/03

Document Content

1

Theory of Operation ...................................................................................................3

1.1 General............................................................................................................................... 3

1.2 Block Diagram .................................................................................................................... 3

2

Functional Description ..............................................................................................4

2.1 FSK Modulation ..................................................................................................................4

2.2 Frequency Modulation ........................................................................................................ 4

2.3 ASK Modulation..................................................................................................................4

2.4 Mode Control Logic............................................................................................................. 4

3

Pin Definition and Description ..................................................................................5

4

Electrical Characteristics ..........................................................................................7

4.1 Absolute Maximum Ratings ................................................................................................ 7

4.2 Normal Operating Conditions.............................................................................................. 7

4.3 Crystal Parameters ............................................................................................................. 7

4.4 DC Characteristics..............................................................................................................8

4.5 AC Characteristics ..............................................................................................................8

4.6 Output Power Selection ...................................................................................................... 8

5

Test Circuit .................................................................................................................9

5.1 Test circuit component list (Fig. 2) ...................................................................................... 9

6

Spectrum Plots.........................................................................................................10

7

Package Information ................................................................................................12

8

Reliability Information..............................................................................................13

9

ESD Precautions ......................................................................................................13

10

Disclaimer .................................................................................................................14