TH72002

315MHz

ASK Transmitter

3901072002

Page 2 of 20

Data Sheet

Rev. 007

June/07

Document Content

1

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

1.1

General ............................................................................................................................. 3

1.2

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

2

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

2.1

Crystal Oscillator .............................................................................................................. 4

2.2

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

2.3

Crystal Pulling................................................................................................................... 4

2.4

Output Power Selection .................................................................................................... 5

2.5

Lock Detection .................................................................................................................. 5

2.6

Low Voltage Detection...................................................................................................... 5

2.7

Mode Control Logic .......................................................................................................... 6

2.8

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

8

Reliability Information..............................................................................................19

9

ESD Precautions ......................................................................................................19

10

Disclaimer .................................................................................................................20