TH72002

315MHz

ASK Transmitter

Page 2 of 21

REVISION 011 - JUNE 13, 2017

3901072002

Contents

Features and Benefits ................................................................................................................................1

Application Examples .................................................................................................................................1

Pin Description...........................................................................................................................................1

Ordering information .................................................................................................................................1

General Description ...................................................................................................................................1

1. Theory of Operation...............................................................................................................................4

1.1. General................................................................................................................................................ 4

1.2. Block Diagram..................................................................................................................................... 4

2. Functional Description ...........................................................................................................................5

2.1. Crystal Oscillator................................................................................................................................. 5

2.2. ASK Modulation .................................................................................................................................. 5

2.3. Crystal Pulling ..................................................................................................................................... 5

2.4. Output Power Selection..................................................................................................................... 6

2.5. Lock Detection.................................................................................................................................... 6

2.6. Low Voltage Detection....................................................................................................................... 6

2.7. Mode Control Logic............................................................................................................................ 7

2.8. Timing Diagrams................................................................................................................................. 7

3. Pin Definition and Description................................................................................................................8

4. Electrical Characteristics ........................................................................................................................9

4.1. Absolute Maximum Ratings ............................................................................................................... 9

4.2. Normal Operating Conditions............................................................................................................ 9

4.3. Crystal Parameters ............................................................................................................................. 9

4.4. DC Characteristics ............................................................................................................................ 10

4.5. AC Characteristics............................................................................................................................. 11

4.6. Output Power Steps ......................................................................................................................... 11

5. Typical Operating Characteristics .........................................................................................................12

5.1. DC Characteristics ............................................................................................................................ 12

5.2. AC Characteristics............................................................................................................................. 15

6. Test Circuit ...........................................................................................................................................18

6.1. Test circuit component list to Fig. 18 .............................................................................................. 18

7. Package Information ............................................................................................................................19