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SX1231 Datasheet(PDF) 2 Page - Semtech Corporation

Part # SX1231
Description  Transceiver Low Power Integrated UHF Transceiver
Download  81 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX1231 Datasheet(HTML) 2 Page - Semtech Corporation

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SX1231
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Rev 3 - April 2010
Table of Contents
Page
1.
General Description ................................................................................................................................................ 8
1.1.
Simplified Block Diagram ................................................................................................................................ 8
1.2.
Pin and Marking Diagram................................................................................................................................ 9
1.3.
Pin Description .............................................................................................................................................. 10
2.
Electrical Characteristics....................................................................................................................................... 11
2.1.
ESD Notice.................................................................................................................................................... 11
2.2.
Absolute Maximum Ratings .......................................................................................................................... 11
2.3.
Operating Range........................................................................................................................................... 11
2.4.
Chip Specification ......................................................................................................................................... 12
2.4.1. Power Consumption ................................................................................................................................. 12
2.4.2. Frequency Synthesis ................................................................................................................................ 12
2.4.3. Receiver ................................................................................................................................................... 13
2.4.4. Transmitter ............................................................................................................................................... 14
2.4.5. Digital Specification ................................................................................................................................... 15
3.
Chip Description.................................................................................................................................................... 16
3.1.
Power Supply Strategy.................................................................................................................................. 16
3.2.
Low Battery Detector..................................................................................................................................... 16
3.3.
Frequency Synthesis..................................................................................................................................... 16
3.3.1. Reference Oscillator ................................................................................................................................. 16
3.3.2. CLKOUT Output ........................................................................................................................................17
3.3.3. PLL Architecture ....................................................................................................................................... 17
3.3.4. Lock Time ..................................................................................................................................................18
3.3.5. Lock Detect Indicator................................................................................................................................ 18
3.4.
Transmitter Description ................................................................................................................................. 19
3.4.1. Architecture Description ........................................................................................................................... 19
3.4.2. Bit Rate Setting ........................................................................................................................................ 19
3.4.3. FSK Modulation........................................................................................................................................ 20
3.4.4. OOK Modulation ....................................................................................................................................... 20
3.4.5. Modulation Shaping.................................................................................................................................. 21
3.4.6. Power Amplifiers ...................................................................................................................................... 21
3.4.7. Over Current Protection ........................................................................................................................... 21
3.5.
Receiver Description ..................................................................................................................................... 22
3.5.1. Block Diagram .......................................................................................................................................... 22
3.5.2. LNA - Single to Differential Buffer ............................................................................................................ 22
3.5.3. Automatic Gain Control ............................................................................................................................ 23
3.5.4. Quadrature Mixer - ADCs - Decimators.................................................................................................... 24
3.5.5. Channel Filter ........................................................................................................................................... 25
3.5.6. DC Cancellation ....................................................................................................................................... 26
3.5.7. Complex Filter - OOK ............................................................................................................................... 26
3.5.8. RSSI ......................................................................................................................................................... 26


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