SX1231-31SKB915【PDF 2/88 页】TVS

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SX1231

WIRELESS & SENSING PRODUCTS

Table of contents

Section

DATASHEET

Page

1.

General Description ............................................................................................................................................... 10

1.1.

1.2.

1.3.

Simplified Block Diagram ............................................................................................................................... 10

Pin and Marking Diagram ..............................................................................................................................11

Pin Description ...............................................................................................................................................12

2.

Electrical Characteristics ....................................................................................................................................... 13

2.1.

2.2.

2.3.

2.4.

ESD Notice .................................................................................................................................................... 13

Absolute Maximum Ratings ........................................................................................................................... 13

Operating Range............................................................................................................................................ 13

Chip Specification ..........................................................................................................................................14

2.4.1. Power Consumption .................................................................................................................................. 14

2.4.2. Frequency Synthesis................................................................................................................................. 14

2.4.3. Receiver .................................................................................................................................................... 15

2.4.4. Transmitter ................................................................................................................................................ 16

2.4.5. Digital Specification ...................................................................................................................................17

3.

Chip Description .................................................................................................................................................... 18

3.1.

3.2.

3.3.

Power Supply Strategy .................................................................................................................................. 18

Low Battery Detector ..................................................................................................................................... 18

Frequency Synthesis ..................................................................................................................................... 18

3.3.1. Reference Oscillator.................................................................................................................................. 18

3.3.2. CLKOUT Output ........................................................................................................................................19

3.3.3. PLL Architecture........................................................................................................................................ 19

3.3.4. Lock Time ..................................................................................................................................................20

3.3.5. Lock Detect Indicator................................................................................................................................. 20

3.4.

Transmitter Description ..................................................................................................................................21

3.4.1. Architecture Description ............................................................................................................................ 21

3.4.2. Bit Rate Setting ......................................................................................................................................... 21

3.4.3. FSK Modulation......................................................................................................................................... 22

3.4.4. OOK Modulation........................................................................................................................................ 23

3.4.5. Modulation Shaping................................................................................................................................... 23

3.4.6. Power Amplifiers ....................................................................................................................................... 23

3.4.7. Over Current Protection ............................................................................................................................ 24

3.5.

Receiver Description ......................................................................................................................................25

3.5.1. Block Diagram ........................................................................................................................................... 25

3.5.2. LNA - Single to Differential Buffer ............................................................................................................. 25

3.5.3. Automatic Gain Control ............................................................................................................................. 26

3.5.4. Continuous-Time DAGC............................................................................................................................ 27

3.5.5. Quadrature Mixer - ADCs - Decimators ....................................................................................................28

3.5.6. Channel Filter ............................................................................................................................................ 28

3.5.7. DC Cancellation ........................................................................................................................................ 29

Rev. 7 - June 2013

Page 2

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