SX1239 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SX1239

Low Power Integrated UHF Receiver

Semtech Corporation 

SX1239

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Index of Figures

Page

Figure 1. Block Diagram ................................................................................................................................................ 8

Figure 2. Pin Diagram .................................................................................................................................................... 9

Figure 3. Marking Diagram ............................................................................................................................................ 9

Figure 4. TCXO Connection ........................................................................................................................................ 15

Figure 5. Receiver Block Diagram ............................................................................................................................... 17

Figure 6. AGC Thresholds Settings ............................................................................................................................. 19

Figure 7. Cordic Extraction .......................................................................................................................................... 22

Figure 8. OOK Peak Demodulator Description ............................................................................................................ 24

Figure 9. Floor Threshold Optimization ....................................................................................................................... 25

Figure 10. Bit Synchronizer Description ...................................................................................................................... 26

Figure 11. FEI Process ................................................................................................................................................ 27

Figure 12. Optimized Afc (AfcLowBetaOn=1) .............................................................................................................. 28

Figure 13. Temperature Sensor Response ................................................................................................................. 29

Figure 14. Rx Startup - No AGC, no AFC .................................................................................................................... 31

Figure 15. Rx Startup - AGC, no AFC ......................................................................................................................... 31

Figure 16. Rx Startup - AGC and AFC ........................................................................................................................ 31

Figure 17. Listen Mode Sequence (no wanted signal is received) .............................................................................. 33

Figure 18. Listen Mode Sequence (wanted signal is received) ................................................................................... 35

Figure 19. Auto Modes of Packet Handler ................................................................................................................... 36

Figure 20. SX1239 Data Processing Conceptual View ............................................................................................... 37

Figure 21. SPI Timing Diagram (single access) .......................................................................................................... 38

Figure 22. FIFO and Shift Register (SR) ..................................................................................................................... 39

Figure 23. FifoLevel IRQ Source Behavior .................................................................................................................. 40

Figure 24. Sync Word Recognition .............................................................................................................................. 41

Figure 25. Continuous Mode Conceptual View ........................................................................................................... 43

Figure 26. Rx Processing in Continuous Mode ........................................................................................................... 43

Figure 27. Packet Mode Conceptual View ................................................................................................................... 44

Figure 28. Fixed Length Packet Format ...................................................................................................................... 45

Figure 29. Variable Length Packet Format .................................................................................................................. 46

Figure 30. Unlimited Length Packet Format ................................................................................................................ 46

Figure 31. CRC Implementation .................................................................................................................................. 50

Figure 32. Manchester Decoding ................................................................................................................................ 50

Figure 33. Data De-Whitening ..................................................................................................................................... 51

Figure 34. POR Timing Diagram ................................................................................................................................. 66

Figure 35. Manual Reset Timing Diagram ................................................................................................................... 67

Figure 36. Application Schematic ................................................................................................................................ 67

Figure 37. Package Outline Drawing ........................................................................................................................... 68

Figure 38. Recommended Land Pattern ..................................................................................................................... 68

Figure 39. Tape & Reel Specification .......................................................................................................................... 69

Figure 40. Listen Mode Resolutions, V2a ................................................................................................................... 70

Figure 41. Listen Mode Resolution, V2b ..................................................................................................................... 71

Rev 3 - Jan 2011

Page 5

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