EVB72015

433MHz FSK/ASK Transmitter

Evaluation Board Description

39012 72015 01

Page 2 of 14

EVB Description

Rev. 007

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

Antenna Board Circuit Diagram ................................................................................7

3.1

Board Component Values to Fig. 6 .................................................................................. 7

3.2

Antenna Board PCB Top View ......................................................................................... 8

3.3

Board Connection ............................................................................................................. 8

4

50

Ω Connector Board Circuit Diagram.....................................................................9

4.1

Board Component Values to Fig. 7 .................................................................................. 9

4.2

50

Ω Connector Board PCB Top View ............................................................................ 10

4.3

Board Connection ........................................................................................................... 10

5

Evaluation Board Layouts .......................................................................................11

5.1

Antenna Board................................................................................................................ 11

5.2

PCB Loop Antenna Dimensions ..................................................................................... 11

5.3

Connector Board ............................................................................................................ 12

6

Board Variants..........................................................................................................12

7

Package Description ................................................................................................13

7.1

Soldering Information ..................................................................................................... 13

7.2

Recommended PCB Footprints ...................................................................................... 13

8

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