SX1231-31SKB433 Semtech, SX1231-31SKB433 Datasheet - Page 2

• Manufacturer Part Number: SX1231-31SKB433
• Description: USB Kit - SX1231 433Mhz
• Manufacturer: Semtech

Table of Contents
1.
2.
3.
Rev 4 - Nov 2010
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.
3.5.
General Description ................................................................................................................................................ 8
Electrical Characteristics....................................................................................................................................... 11
Chip Description.................................................................................................................................................... 16
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
3.3.1. 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
3.4.1. 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 ............................................................................................................................22
3.5.1. Block Diagram .......................................................................................................................................... 23
3.5.2. LNA - Single to Differential Buffer ............................................................................................................ 23
3.5.3. Automatic Gain Control ............................................................................................................................ 24
3.5.4. Continuous-Time DAGC........................................................................................................................... 25
3.5.5. Quadrature Mixer - ADCs - Decimators .....................................................................................................26
3.5.6. Channel Filter ........................................................................................................................................... 26
3.5.7. DC Cancellation ....................................................................................................................................... 27
3.5.8. Complex Filter - OOK ............................................................................................................................... 27
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.................................................................................................................................. 16
Low Battery Detector..................................................................................................................................... 16
Frequency Synthesis..................................................................................................................................... 16
Transmitter Description ................................................................................................................................. 19
Receiver Description ..................................................................................................................................... 23
Page 2
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SX1231
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