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PDF SX1231 Data sheet ( Hoja de datos )
| Número de pieza | SX1231 | |
| Descripción | Low Power Integrated UHF Transceiver | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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SX1231
ADVANCED COMMUNICATIONS & SENSING
SX1231 Transceiver
Low Power Integrated UHF Transceiver
DATASHEET
RFIO
VBAT1&2
VR_ANA
VR_DIG
Power Distribution System
LNA
Σ/Δ
Single to
Mixers
Modulators
Differential
RC
Oscillator
GND
VR_PA
PA_BOOST
PA0
Ramp &
Control
PA1&2
Tank
Inductor
Loop
Filter
Division by
2, 4 or 6
Frac-N PLL
Synthesizer
XO
32 MHz
XTAL
RSSI
AFC
GND
RESET
SPI
RXTX
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
GENERAL DESCRIPTION
The SX1231 is a highly integrated RF transceiver capable of
operation over a wide frequency range, including the 433,
868 and 915 MHz license-free ISM (Industry Scientific and
Medical) frequency bands. Its highly integrated architecture
allows for a minimum of external components whilst
maintaining maximum design flexibility. All major RF
communication parameters are programmable and most of
them can be dynamically set. The SX1231 offers the unique
advantage of programmable narrow-band and wide-band
communication modes without the need to modify external
components. The SX1231 is optimized for low power
consumption while offering high RF output power and
channelized operation, suitable for both the European (ETSI
EN 300-220-1) and the North American (FCC part 15)
regulatory standards. TrueRF™ technology enables a
lowcost external component count (elimination of the SAW
filter) whilst still satisfying ETSI and FCC regulations.
APPLICATIONS
Automated Meter Reading
Wireless Sensor Networks
Home and Building Automation
Wireless Alarm and Security Systems
Industrial Monitoring and Control
KEY PRODUCT FEATURES
High Sensitivity: down to -120 dBm at 1.2 kbps
High Selectivity: 16-tap FIR Channel Filter
Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm,
80 dB Blocking Immunity, no Image Frequency response
Low current: Rx = 16 mA, 100nA register retention
Programmable Pout: -18 to +17 dBm in 1dB steps
Constant RF performance over voltage range of chip
FSK Bit rates up to 300 kb/s
Fully integrated synthesizer with a resolution of 61 Hz
FSK, GFSK, MSK, GMSK and OOK modulations
Built-in Bit Synchronizer performing Clock Recovery
Incoming Sync Word Recognition
115 dB+ Dynamic Range RSSI
Automatic RF Sense with ultra-fast AFC
Packet engine with CRC, AES-128 encryption and 66-
byte FIFO
Built-in temperature sensor and Low Battery indicator
ORDERING INFORMATION
Part Number
SX1231IMLTRT
Delivery
Tape & Reel
MOQ / Multiple
3000 pieces
QFN 24 Package - Operating Range [-40;+85°C]
Pb-free, Halogen free, RoHS/WEEE compliant product
Rev 2 - Nov 2009
Page 1
www.semtech.com
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
SX1231
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 ........................................................................................................................................ 16
Figure 5. Transmitter Block Diagram ........................................................................................................................... 19
Figure 6. Receiver Block Diagram ............................................................................................................................... 22
Figure 7. AGC Thresholds Settings ............................................................................................................................. 23
Figure 8. Cordic Extraction .......................................................................................................................................... 27
Figure 9. OOK Peak Demodulator Description ............................................................................................................ 27
Figure 10. Floor Threshold Optimization ..................................................................................................................... 28
Figure 11. Bit Synchronizer Description ...................................................................................................................... 29
Figure 12. FEI Process ................................................................................................................................................ 31
Figure 13. Temperature Sensor Response ................................................................................................................. 32
Figure 14. Tx Startup, FSK and OOK .......................................................................................................................... 34
Figure 15. Rx Startup - No AGC, no AFC .................................................................................................................... 35
Figure 16. Rx Startup - AGC, no AFC ......................................................................................................................... 35
Figure 17. Rx Startup - AGC and AFC ........................................................................................................................ 35
Figure 18. Listen Mode Sequence (no wanted signal is received) .............................................................................. 37
Figure 19. Listen Mode Sequence (wanted signal is received) ................................................................................... 39
Figure 20. Auto Modes of Packet Handler ................................................................................................................... 40
Figure 21. SX1231 Data Processing Conceptual View ............................................................................................... 41
Figure 22. SPI Timing Diagram (single access) .......................................................................................................... 42
Figure 23. FIFO and Shift Register (SR) ..................................................................................................................... 43
Figure 24. FifoLevel IRQ Source Behavior .................................................................................................................. 44
Figure 25. Sync Word Recognition .............................................................................................................................. 45
Figure 26. Continuous Mode Conceptual View ........................................................................................................... 47
Figure 27. Tx Processing in Continuous Mode ............................................................................................................ 47
Figure 28. Rx Processing in Continuous Mode ........................................................................................................... 48
Figure 29. Packet Mode Conceptual View ................................................................................................................... 49
Figure 30. Fixed Length Packet Format ...................................................................................................................... 50
Figure 31. Variable Length Packet Format .................................................................................................................. 50
Figure 32. Unlimited Length Packet Format ................................................................................................................ 51
Figure 33. CRC Implementation .................................................................................................................................. 55
Figure 34. Manchester Encoding/Decoding ................................................................................................................. 56
Figure 35. Data Whitening ........................................................................................................................................... 56
Figure 36. POR Timing Diagram ................................................................................................................................. 73
Figure 37. Manual Reset Timing Diagram ................................................................................................................... 74
Figure 38. Package Outline Drawing ........................................................................................................................... 75
Figure 39. Recommended Land Pattern ..................................................................................................................... 75
Figure 40. Tape & Reel Specification .......................................................................................................................... 76
Rev 2 - Nov 2009
Page 5
www.semtech.com
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
SX1231
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
2. Electrical Characteristics
2.1. ESD Notice
The SX1231 is a high performance radio frequency device. It satisfies:
Class 2 of the JEDEC standard JESD22-A114-B (Human Body Model) on all pins.
Class B of the JEDEC standard JESD22-A115-A (Machine Model) on all pins.
Class IV of the JEDEC standard JESD22-C101C (Charged Device Model) on pins 2-3-21-23-24, Class III on all other
pins.
It should thus be handled with all the necessary ESD precautions to avoid any permanent damage.
2.2. Absolute Maximum Ratings
Stresses above the values listed below may cause permanent device failure. Exposure to absolute maximum ratings for
extended periods may affect device reliability.
Table 2 Absolute Maximum Ratings
Symbol
VDDmr
Tmr
Tj
Pmr
Supply Voltage
Temperature
Junction temperature
RF Input Level
Description
Min Max Unit
-0.5 3.9 V
-55
+115
°C
-
+125
°C
- +6 dBm
2.3. Operating Range
Table 3 Operating Range
Symbol
VDDop
Top
Clop
ML
Description
Supply voltage
Operational temperature range
Load capacitance on digital ports
RF Input Level
Min Max Unit
1.8 3.6 V
-40 +85 °C
- 25 pF
- 0 dBm
Rev 2 - Nov 2009
Page 11
www.semtech.com
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SX1231.PDF ] | |
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