TH72005

315MHz

FSK/ASK Transmitter

39010 72005

Page 2 of 20

Data Sheet

Rev. 008

June/07

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