TH72005

315MHz

FSK/ASK Transmitter

3901072005

Page 2 of 20

Data Sheet

Rev. 011

Jul/12

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