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Telit Wireless Solutions SL871 Product Description
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Telit Wireless Solutions SL871 Product Description

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SL871 Product Description

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Summary of Contents for Telit Wireless Solutions SL871

  • Page 1 SL871 Product Description...
  • Page 2 80434ST10610A r0 – 2014-03-12...
  • Page 3 80434ST10610A r0 – 2014-03-12 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE Notice While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein.
  • Page 4 80434ST10610A r0 – 2014-03-12 Usage and Disclosure Restrictions License Agreements The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement.
  • Page 5 80434ST10610A r0 – 2014-03-12 Contents 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 Overview ............................11 Technical Description ........................
  • Page 6 80434ST10610A r0 – 2014-03-12 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.
  • Page 7 80434ST10610A r0 – 2014-03-12 6.1.1. Standard Messages ........................... 27 6.1.2. Proprietary Messages ........................27 6.2. NMEA Commands ........................28 Mechanical Drawing ........................29 Evaluation Kit ..........................31 Product Handling ..........................32 9.1. Product Packaging and Delivery ....................32 9.2. Moisture Sensitivity ........................34 9.3.
  • Page 8 80434ST10610A r0 – 2014-03-12 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.
  • Page 9 “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.
  • Page 10 80434ST10610A r0 – 2014-03-12 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,...
  • Page 11 80434ST10610A r0 – 2014-03-12 The SL871 represents a new age of receiver that can simultaneously search and track satellite signals from multiple satellite constellations. This multi-GNSS receiver uses the entire spectrum of GNSS systems available: GPS, GLONASS, Beidou, Galileo and QZSS.
  • Page 12 80434ST10610A r0 – 2014-03-12 High-speed Location Engine – An ARM7 core with embedded Flash memory offers enhanced sensitivity, fast time to first fix and improved position accuracy. GNSS receiver- Supporting GPS+ GLONAS or GPS + Beidou. Jammer Immunity – Embedded interference suppression, actively identify and remove jammers pre- and post-correlation.
  • Page 13 80434ST10610A r0 – 2014-03-12 The functional architecture of the SL871 receiver is shown in Figure 1. ANTENNA VBATT TCXO GNSS Flash 1PPS UART/ Figure 1 SL869 Architecture Note: LNA is included in the GNSS chip for passive antenna operation. All power supply components are on board including capacitors.
  • Page 14 The Battery Backup supply voltage is 2.0V to 3.6V. It is a typical low current supply for ensuring that the RTC is kept running and critical data is maintained to enable HOT/WARM starts. The SL871 host serial port is the primary communications port which outputs data and accepts commands in NMEA format. ...
  • Page 15 Manufactured in an ISO 9000: 2000 accredited facility Manufactured to TS 16949 requirement (upon request) Moreover, the SL871 module conforms to the following European Union Directives: Low Voltage Directive 2006/95/EEC and product safety Directive EMC 2004/108/EC for conformity for EMC...
  • Page 16 80434ST10610A r0 – 2014-03-12 The SL871 supports a 2D barcode label indicating the unit manufacturing information and serial number. Contact the factory for information on specific module serial numbers.
  • Page 17 80434ST10610A r0 – 2014-03-12 TTFF is the actual time required by a GPS receiver to achieve a valid position solution. This specification will vary with the operating state of the receiver, the length of time since the last position fix, the location of the last fix, and the specific receiver design. Please refer to section 4.6 for performance data.
  • Page 18 The TIMEPULSE (PPS) output signal provides a pulse-per-second output signal for timing purposes. The SL871 time pulse signal is one pulse per second. Pulse length (high state) is 100 ms and it has +/- 10 nS nominal accuracy synchronized at rising edge to full UTC second with nominal GNSS signal levels.
  • Page 19 80434ST10610A r0 – 2014-03-12 The SL871 supports operational modes that allow it to provide positioning information at reduced overall current consumption. In this mode the receiver stops navigation, the internal processor enters standby state, and the current drain at main supply VCC is typically reduced to 0.4 mA. Standby mode is entered by a PMTK command. Enter standby mode by sending the command: $PMTK161,0*28.
  • Page 20 7 mW. Associated profiles are: High and Low Speed, Walking, Outdoor Static and Indoor. The module can control the embedded VCC power switch autonomously only after the SL871 is set to Periodic or to AlwaysLocate™ mode by a PMTK command.
  • Page 21 In-line LNA used with 1dB noise figure (NF) and 20dB gain. Table 2 – SL871 Performance Data The SL871 receiver will lose track if any of the following limits are exceeded: ITAR limits: velocity greater than 515 m/s AND altitude above 18,000 m...
  • Page 22 The battery backup power input range is 2.0V to 3.6V. It is required for HOT/WARM starts and retention of GPS data. The SL871 requires an external antenna Bias-T to provide the voltage to the antenna. The RF input is 1561 MHz to 1606 MHz (L1 Band) at a level between -135 dBm and -165 dBm into 50 Ohm impedance.
  • Page 23 1. Using the Power Flash tool , the user can load firmware by downloading the code from a PC with suitable software. . All communications between the SL871 receiver and external devices are through the I/O surface mount pads. These provide the contacts for power, ground, serial I/O and control. Power...
  • Page 24 80434ST10610A r0 – 2014-03-12 Parameter Symbol Unit Power Supply Voltage Operating Temperature Current Consumption  Navigation/Tracking:  GPS + GLO  GPS Only  GLO Only  Acquisition:  GPS + GLO  GPS Only  Low Power Standby Mode: ...
  • Page 25 80434ST10610A r0 – 2014-03-12 Absolute Maximum Ratings Parameter Symbol Rating Units Power Supply Voltage Input Pin Voltage VIO_IN Output Pin Voltage VIO_OUT Storage Temperature -40°C to +85°C Warning – Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent damage.
  • Page 26 80434ST10610A r0 – 2014-03-12 Details of the LGA pad functions are shown in Table 6. Pad Number Pad Function Type Description Ground Serial Port UART Serial Port UART Timepulse Timemark Pulse, (1PPS) Reserved V_BCKP Backup Voltage Supply can be connected to VCC for Reserved compatibility or left un connected Supply Voltage...
  • Page 27 QZSS satellites are visible. Other NMEA-defined messages are supported by the SL871, including GLL, VTG and ZDA messages. The SL871 supports a set of proprietary NMEA output messages which report additional receiver data and status information on a periodic basis.
  • Page 28 80434ST10610A r0 – 2014-03-12 The SL871 has a user command interface that uses NMEA proprietary messages for commands and command responses. This interface provides configuration and control over certain firmware features and operational properties of the module.
  • Page 29 80434ST10610A r0 – 2014-03-12 Figure 3 Package Outline Drawing (Top View and Bottom View) Dimensions are in mm...
  • Page 30 80434ST10610A r0 – 2014-03-12 Figure 4 Pinout (Top View) Figure 5 3D Model...
  • Page 31 80434ST10610A r0 – 2014-03-12 The SL871 Development Kit is available to assist in the evaluation and integration of the SL871 module in custom applications. The Development Kit contains all of the necessary hardware and software to carry out a thorough evaluation of the SL871 module.
  • Page 32 (refer to sections 8.2 and 8.3). Figure 8: Tape and Reel Packaging SL871 modules are also available in trays. The modules are shipped in trays with 100 units per tray. Five trays are ‘dry’ packaged and vacuum sealed in a Moisture Barrier Bag (MBB) with...
  • Page 33 80434ST10610A r0 – 2014-03-12 Figure 9: Tray Packaging...
  • Page 34 Further information can be obtained from the IPC/JEDEC standard J-STD-033: Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices. The SL871 GNSS receiver contains class 1 devices and is Electro-Static Discharge Sensitive (ESDS). Telit recommends the two basic principles of protecting ESD devices from damage: Only handle sensitive components in an ESD Protected Area (EPA) under protected and controlled conditions.
  • Page 35 80434ST10610A r0 – 2014-03-12 The Telit SL871 module is fully compliant to the EU RoHS Directives.
  • Page 36 80434ST10610A r0 – 2014-03-12 AGPS: Assisted GPS. AGPS uses additional resources to locate the satellites faster and better in poor signal conditions. Almanac: A set of orbital parameters that allows calculation of approximate GPS satellite positions and velocities. The almanac is used by a GPS receiver to determine satellite visibility and as an aid during acquisition of GPS satellite signals.
  • Page 37 80434ST10610A r0 – 2014-03-12 NMEA: National Marine Electronics Association SBAS: Satellite Based Augmentation System Any system that uses a network of geostationary satellites and ground stations to improve the performance of a Global Navigation Satellite System (GNSS). Current examples are EGNOS and WAAS.
  • Page 38 80434ST10610A r0 – 2014-03-12 READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required. Do not disassemble the product; any mark of tampering will compromise the warranty validity. We recommend following the instructions of the hardware user guide for a correct wiring of the product.
  • Page 39 80434ST10610A r0 – 2014-03-12 Revision Date Changes 2014-03-12 First issue...