SX1235IMLTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SX1235IMLTRT

EN300 220 Category 1 Compliant Transceiver

Semtech Corporation 

SX1235

WIRELESS & SENSING

Table of contents

Section

DATASHEET

Page

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

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

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

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

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

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

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

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

2.4. ETSI Category 1 Specification .......................................................................................................................14

2.4.1. SAW Filter Specification............................................................................................................................ 14

2.4.2. Category 1 Test Conditions....................................................................................................................... 14

2.4.3. System Performance (Absolute Units) with a SAW as Defined in 2.4.1.................................................... 14

2.4.4. System Performance (Regulatory Margin) ................................................................................................ 15

2.4.5. Measurement Configuration for Category 1 Testing ................................................................................. 15

2.4.6. 869 MHz Category 1 Reference Design Module SM1235 ........................................................................ 16

2.5. Circuit Specification ....................................................................................................................................... 18

2.5.1. Power Consumption .................................................................................................................................. 18

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

2.5.3. Receiver .................................................................................................................................................... 19

2.5.4. Transmitter ................................................................................................................................................ 20

2.5.5. Digital Specification ................................................................................................................................... 21

3. Chip Description .................................................................................................................................................... 22

3.1. Power Supply Strategy .................................................................................................................................. 23

3.2. Low Battery Detector ..................................................................................................................................... 23

3.3. Frequency Synthesis .....................................................................................................................................24

3.3.1. Reference Oscillator.................................................................................................................................. 24

3.3.2. CLKOUT Output ........................................................................................................................................ 24

3.3.3. PLL Architecture........................................................................................................................................ 24

3.3.4. RC Oscillator ............................................................................................................................................. 26

3.4. Transmitter Description ..................................................................................................................................27

3.4.1. Architecture Description ............................................................................................................................ 27

3.4.2. Bit Rate Setting ......................................................................................................................................... 27

3.4.3. FSK Modulation......................................................................................................................................... 28

3.4.4. OOK Modulation........................................................................................................................................ 29

3.4.5. Modulation Shaping................................................................................................................................... 29

3.4.6. RF Power Amplifiers.................................................................................................................................. 29

3.4.7. High Power +20 dBm Operation ...............................................................................................................30

3.4.8. Over Current Protection ............................................................................................................................31

3.5. Receiver Description ......................................................................................................................................32

Rev 1 - December 2012

Page 2

www.semtech.com

Share Link: