SX1239IMLTRT Semtech, SX1239IMLTRT Datasheet - Page 2
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SX1239IMLTRT
Manufacturer Part Number
SX1239IMLTRT
Description
IC, RF RECEIVER, 1.02GHz, QFN-24
Manufacturer
Semtech
Datasheet
1.SX1239IMLTRT.pdf
(73 pages)
Specifications of SX1239IMLTRT
Applications
Wireless Sensor Networks, Automated Meter Reading, Home And Building Automation
Receiving Current
16mA
Data Rate
300Kbps
Modulation Type
FSK, OOK
Sensitivity Dbm
-120dBm
Rohs Compliant
Yes
Rf Ic Case Style
QFN
No. Of Pins
24
Sensitivity (dbm)
-120dBm
Supply Voltage Range
1.8V To 3.6V
Operating Temperature Range
-40°C To +85°C
Lead Free Status / Rohs Status
Supplier Unconfirmed
Table of Contents
1.
2.
3.
Rev 3 - Jan 2011
ADVANCED COMMUNICATIONS & SENSING
1.1.
1.2.
1.3.
2.1.
2.2.
2.3.
2.4.
3.1.
3.2.
3.3.
3.4.
General Description ................................................................................................................................................ 8
Electrical Characteristics....................................................................................................................................... 11
Chip Description.................................................................................................................................................... 15
2.4.1. Power Consumption ................................................................................................................................. 12
2.4.2. Frequency Synthesis ................................................................................................................................ 12
2.4.3. Receiver ................................................................................................................................................... 13
2.4.4. Digital Specification .................................................................................................................................. 14
3.3.1. Reference Oscillator ................................................................................................................................. 15
3.3.2. CLKOUT Output ........................................................................................................................................16
3.3.3. PLL Architecture ....................................................................................................................................... 16
3.3.4. Lock Time ..................................................................................................................................................17
3.3.5. Lock Detect Indicator................................................................................................................................ 17
3.4.1. Block Diagram .......................................................................................................................................... 17
3.4.2. LNA - Single to Differential Buffer .............................................................................................................18
3.4.3. Automatic Gain Control ............................................................................................................................ 18
3.4.4. Continuous-Time DAGC........................................................................................................................... 20
3.4.5. Quadrature Mixer - ADCs - Decimators.................................................................................................... 20
3.4.6. Channel Filter ........................................................................................................................................... 20
3.4.7. DC Cancellation ....................................................................................................................................... 21
3.4.8. Complex Filter - OOK ............................................................................................................................... 22
3.4.9. RSSI ......................................................................................................................................................... 22
3.4.10. Cordic ..................................................................................................................................................... 22
3.4.11. Bit Rate Setting ...................................................................................................................................... 22
3.4.12. FSK Demodulator ................................................................................................................................... 23
3.4.13. OOK Demodulator ...................................................................................................................................24
3.4.14. Bit Synchronizer ......................................................................................................................................26
3.4.15. Frequency Error Indicator....................................................................................................................... 26
3.4.16. Automatic Frequency Correction ............................................................................................................ 27
3.4.17. Optimized Setup for Low Modulation Index Systems ............................................................................. 28
Simplified Block Diagram ................................................................................................................................ 8
Pin and Marking Diagram................................................................................................................................ 9
Pin Description .............................................................................................................................................. 10
ESD Notice.................................................................................................................................................... 11
Absolute Maximum Ratings .......................................................................................................................... 11
Operating Range........................................................................................................................................... 11
Chip Specification ......................................................................................................................................... 12
Power Supply Strategy.................................................................................................................................. 15
Low Battery Detector..................................................................................................................................... 15
Frequency Synthesis..................................................................................................................................... 15
Receiver Description ..................................................................................................................................... 17
Page 2
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