SX1231H Просмотр технического описания (PDF) - Semtech Corporation

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SX1231H

Low Power Integrated UHF Transceiver with On-Chip +20dBm PA

Semtech Corporation 

SX1231H

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

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. Frequency Synthesis..................................................................................................................................... 16

3.2.1. Reference Oscillator ................................................................................................................................. 16

3.2.2. CLKOUT Output ........................................................................................................................................17

3.2.3. PLL Architecture ....................................................................................................................................... 17

3.2.4. Lock Time .................................................................................................................................................. 18

3.2.5. Lock Detect Indicator................................................................................................................................ 18

3.3. Transmitter Description ................................................................................................................................. 19

3.3.1. Architecture Description ........................................................................................................................... 19

3.3.2. Bit Rate Setting ........................................................................................................................................ 19

3.3.3. FSK Modulation ........................................................................................................................................ 20

3.3.4. OOK Modulation ....................................................................................................................................... 20

3.3.5. Modulation Shaping.................................................................................................................................. 21

3.3.6. Power Amplifiers ...................................................................................................................................... 21

3.3.7. High Power Settings ..................................................................................................................................22

3.3.8. Output Power Summary ........................................................................................................................... 22

3.3.9. Over Current Protection ........................................................................................................................... 22

3.4. Receiver Description ..................................................................................................................................... 23

3.4.1. Block Diagram .......................................................................................................................................... 23

3.4.2. LNA - Single to Differential Buffer ............................................................................................................ 23

3.4.3. Automatic Gain Control ............................................................................................................................ 24

3.4.4. Continuous-Time DAGC........................................................................................................................... 25

3.4.5. Quadrature Mixer - ADCs - Decimators.................................................................................................... 26

3.4.6. Channel Filter ........................................................................................................................................... 26

3.4.7. DC Cancellation ....................................................................................................................................... 27

Rev 1 - Oct 2011

Page 2

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