Telit Wireless Solutions SL871 Technical specifications

SL871 Product Description

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SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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Usage and Disclosure Restrictions
License Agreements
The software described in this document is the property of Telit and its licensors. It is furnished
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Components, units, or third-party products used in the product described herein are NOT fault-
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the following hazardous environments requiring fail-safe controls: the operation of Nuclear
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Copyright © Telit Communications S.p.A., 2014.

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Contents
1. Introduction ....................................................................................................................................... 8
1.1. Scope............................................................................................................................................ 8
1.2. Audience....................................................................................................................................... 8
1.3. Contact Information, Support....................................................................................................... 8
1.4. Document Organization ............................................................................................................... 9
1.5. Text Conventions ......................................................................................................................... 9
1.6. Related Documents .................................................................................................................... 10
2. Overview........................................................................................................................................... 11
3. Technical Description...................................................................................................................... 12
3.1. Receiver Architecture................................................................................................................. 13
3.2. Major Components..................................................................................................................... 13
3.2.1. GNSS Chip.......................................................................................................................................13
3.2.2. RF_IN ..............................................................................................................................................14
3.2.3. VCC .................................................................................................................................................14
3.2.4. VBATT............................................................................................................................................14
3.2.5. Serial Interface.................................................................................................................................14
3.2.6. SAW Filter.......................................................................................................................................14
3.2.7. TCXO...............................................................................................................................................14
3.2.8. RTC..................................................................................................................................................14
3.2.9. Memory............................................................................................................................................14
3.3. Physical Characteristics.............................................................................................................. 14
3.4. Mechanical Specification........................................................................................................... 15
3.5. External Antenna Connection .................................................................................................... 15
3.6. Input/Output and Power Connections........................................................................................ 15
3.7. Environmental............................................................................................................................ 15
3.8. Compliances............................................................................................................................... 15
3.9. Marking/Serialization................................................................................................................. 16
4. Performance Characteristics.......................................................................................................... 17

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4.1. TTFF (Time to First Fix)............................................................................................................ 17
4.1.1. Hot Start...........................................................................................................................................17
4.1.2. Warm Start.......................................................................................................................................17
4.1.3. Cold Start.........................................................................................................................................17
4.2. AGPS.......................................................................................................................................... 17
4.2.1. Local AGPS.....................................................................................................................................18
4.2.2. Server-Based AGPS.........................................................................................................................18
4.3. Time Mark Pulse (1PPS)............................................................................................................ 18
4.3.1. Satellite Based Augmentation Systems (SBAS)..............................................................................18
4.4. Reduced Power Modes............................................................................................................... 19
4.4.1. Standby mode...................................................................................................................................19
4.4.2. Periodic Mode..................................................................................................................................19
4.4.3. Always Locate Mode.......................................................................................................................20
4.5. Performance Data GPS/Glonass or GPS/Beidou ....................................................................... 21
4.6. Dynamic Constraints.................................................................................................................. 21
5. Electrical Requirements.................................................................................................................. 22
5.1. Power Supply ............................................................................................................................. 22
5.1.1. VCC .................................................................................................................................................22
5.1.2. VBATT............................................................................................................................................22
5.2. External Antenna Voltage.......................................................................................................... 22
5.3. RF (Radio Frequency) Input ...................................................................................................... 22
5.4. Antenna Gain.............................................................................................................................. 22
5.5. Burnout Protection ..................................................................................................................... 22
5.6. Jamming Performance................................................................................................................ 23
5.7. Flash Upgradability.................................................................................................................... 23
5.8. Data Input/Output Specifications............................................................................................... 23
5.8.1. Voltages and Currents......................................................................................................................24
5.8.2. DC Electrical Characteristics...........................................................................................................25
5.8.3. Pinout Description............................................................................................................................26
6. Software Interface ........................................................................................................................... 27
6.1. NMEA Output Messages ........................................................................................................... 27

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6.1.1. Standard Messages...........................................................................................................................27
6.1.2. Proprietary Messages.......................................................................................................................27
6.2. NMEA Commands..................................................................................................................... 28
7. Mechanical Drawing ....................................................................................................................... 29
8. Evaluation Kit.................................................................................................................................. 31
9. Product Handling ............................................................................................................................ 32
9.1. Product Packaging and Delivery................................................................................................ 32
9.2. Moisture Sensitivity ................................................................................................................... 34
9.3. ESD Sensitivity.......................................................................................................................... 34
9.4. Safety.......................................................................................................................................... 34
9.5. Disposal...................................................................................................................................... 34
10. RoHS Declaration ........................................................................................................................ 35
11. Glossary and Acronyms .............................................................................................................. 36
12. Safety Recommendations............................................................................................................ 38
13. Document History........................................................................................................................ 39

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Scope of this document is to give an overview of SL871 GNSS family of modules.
SL871 is a standalone GNSS module capable of using GPS+GLONASS Satellites
SL871 is a standalone GNSS module capable of using GPS + Beidou Satellites
This document is intended for customers developing applications using SL871 or for customer
wanting to adopt existing designs to industry standard existing modules.
For general contact, technical support, to report documentation errors and to order manuals,
contact Telit Technical Support Center (TTSC) at:
TS-[email protected]
[e-mail]
TS-LATINAMERI[email protected]
[e-mail]
Alternatively, use:
http://www.telit.com/en/products/technical-support-center/contact.php
For detailed information about where you can buy the Telit modules or for recommendations on
accessories and components visit:
http://www.telit.com
To register for product news and announcements or for product questions contact Telit Technical
Support Center (TTSC).
Our aim is to make this guide as helpful as possible. Keep us informed of your comments and
suggestions for improvements.
Telit appreciates feedback from the users of our information.

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This document contains the following chapters:
“Chapter 1: “Introduction” provides a scope for this document, target audience, contact and
support information, and text conventions.
“Chapter 2: “Overview”gives an overview of the features of the product.
“Chapter 3: “Technical Description” describes the features of the product.
“Chapter 4: “Performance Characteristics” describes in details the characteristics of the product.
“Chapter 5: “Electrical Requirements” describes in details the electrical characteristics of the
product.
“Chapter 6: “Software Interface” provides information on default serial configuration.
“Chapter 7: “Mechanical Drawings” provides info about Hardware interfaces.
“Chapter 8: “Evaluation Kit” provides some fundamental hints about evaluation Kit.
“Chapter 9: “Product Compatibility”describes the compatibility of the SL871
“Chapter 10: “Product Handling” describes the packaging and mounting of the module
“Chapter 11: “Conformity” shows a Declaration of Conformity and CETECOM ICT Certificate,
“Chapter 12: “ROHS Declaration” states that the Telit SL871 module is fully compliant to EU
Directives.
“Chapter 13 “Glossary and Acronyms” contain the explanation of acronyms used in the present
document
“Chapter 14: “Safety Recommendation” provides some safety recommendations that must be
follow by the customer in the design of the application that makes use of the SL871.
“Chapter 15: “Document History” provides the history of the present document.

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All dates are in ISO 8601 format, i.e. YYYY-MM-DD.
SL871 Hardware User Guide, 1VV0301147
SL871 Software User Guide,
SL871 EVK User Guide,