SX1232IML View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SX1232IML

868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

Semtech Corporation 

SX1232

WIRELESS & SENSING

DATASHEET

Table of Contents

Section

Page

1. General Description ................................................................................................................................................ 9

1.1. Simplified Block Diagram ................................................................................................................................ 9

1.2. Pin and Marking Diagram.............................................................................................................................. 10

1.3. Pin Description .............................................................................................................................................. 11

2. Electrical Characteristics....................................................................................................................................... 12

2.1. ESD Notice.................................................................................................................................................... 12

2.2. Absolute Maximum Ratings .......................................................................................................................... 12

2.3. Operating Range........................................................................................................................................... 12

2.4. Chip Specification ......................................................................................................................................... 13

2.4.1. Power Consumption ................................................................................................................................. 13

2.4.2. Frequency Synthesis ................................................................................................................................ 13

2.4.3. Receiver ................................................................................................................................................... 14

2.4.4. Transmitter ............................................................................................................................................... 15

2.4.5. Digital Specification .................................................................................................................................. 16

3. Chip Description.................................................................................................................................................... 17

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

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

3.3. Frequency Synthesis..................................................................................................................................... 19

3.3.1. Reference Oscillator ................................................................................................................................. 19

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

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

3.3.4. RC Oscillator ............................................................................................................................................ 21

3.4. Transmitter Description ................................................................................................................................. 22

3.4.1. Architecture Description ........................................................................................................................... 22

3.4.2. Bit Rate Setting ........................................................................................................................................ 22

3.4.3. FSK Modulation ........................................................................................................................................ 23

3.4.4. OOK Modulation ....................................................................................................................................... 24

3.4.5. Modulation Shaping.................................................................................................................................. 24

3.4.6. RF Power Amplifiers................................................................................................................................. 24

3.4.7. High Power +20dBm Operation................................................................................................................. 25

3.4.8. Over Current Protection ............................................................................................................................26

3.5. Receiver Description ..................................................................................................................................... 27

3.5.1. Overview .................................................................................................................................................. 27

3.5.2. Automatic Gain Control - AGC ................................................................................................................. 27

3.5.3. RSSI ......................................................................................................................................................... 28

3.5.4. Channel Filter ........................................................................................................................................... 29

3.5.5. FSK Demodulator ..................................................................................................................................... 30

3.5.6. OOK Demodulator .................................................................................................................................... 30

3.5.7. Bit Synchronizer 33

Rev 3 - August 2012

Page 2

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