EVB7122 Datasheet, PDF (2/24 Pages) Melexis Microelectronic Systems – 27 to 930MHz Transceiver Evaluation Board Description

EVB7122
27 to 930MHz Transceiver
Evaluation Board Description
Document Content
1 Theory of Operation ...................................................................................................3
1.1 General............................................................................................................................. 3
1.2 Technical Data Overview.................................................................................................. 3
1.3 Note on ASK Operation .................................................................................................... 3
1.4 Block Diagram .................................................................................................................. 4
1.5 User Mode Features ......................................................................................................... 4
2 Description of User Modes........................................................................................5
2.1 Stand-alone User Mode Operation ................................................................................... 5
2.1.1 Frequency Selection .................................................................................................................... 5
2.1.2 Operation Mode ........................................................................................................................... 5
2.1.3 Modulation Type .......................................................................................................................... 6
2.1.4 LNA Gain Mode ........................................................................................................................... 6
2.2 Programmable User Mode Operation............................................................................... 6
2.2.1 Serial Control Interface Description ............................................................................................. 6
3 Register Description ..................................................................................................7
3.1 Register Overview ............................................................................................................ 8
3.1.1 Default Register Settings for FS0, FS1........................................................................................ 8
3.1.2 A – word ....................................................................................................................................... 9
3.1.3 B – word ..................................................................................................................................... 10
3.1.4 C – word..................................................................................................................................... 11
3.1.5 D – word..................................................................................................................................... 12
4 Application Circuits .................................................................................................13
4.1 FSK Application Circuit Programmable User Mode (internal AFC option)...................... 13
4.1.1 Board Component Values for FSK Reception ........................................................................... 14
4.1.2 Component Arrangement Top Side for FSK Reception ............................................................ 15
4.2 ASK Application Circuit Programmable User Mode (normal data slicer option) ............. 16
4.2.1 Board Component Values for ASK (normal data slicer option) ................................................. 17
4.2.2 Component Arrangement Top Side for ASK Reception (normal data slicer option) ................. 18
4.3 ASK Application Circuit with Peak Detector Option ........................................................ 19
4.3.1 Board Component Values for ASK (peak detector option)........................................................ 20
4.3.2 Component Arrangement Top Side for ASK Reception (peak detector option)........................ 21
5 Evaluation Board Layouts .......................................................................................22
6 Board Variants..........................................................................................................22
7 Package Description ................................................................................................23
7.1 Soldering Information ..................................................................................................... 23
8 Disclaimer .................................................................................................................24
39012 07122 02
Rev. 005
Page 2 of 24
EVB Description
June/07