SL869 Product Description 80405ST10105A r6 – 2014-09-15

SL869 Product Description
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SL869 Product Description
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APPLICABILITY TABLE
PRODUCT
SL869
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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. The information in this document has been carefully checked and
is believed to be entirely reliable. However, no responsibility is assumed for inaccuracies or
omissions. Telit reserves the right to make changes to any products described herein and
reserves the right to revise this document and to make changes from time to time in content
hereof with no obligation to notify any person of revisions or changes. Telit does not assume
any liability arising out of the application or use of any product, software, or circuit described
herein; neither does it convey license under its patent rights or the rights of others.
It is possible that this publication may contain references to, or information about Telit products
(machines and programs), programming, or services that are not announced in your country.
Such references or information must not be construed to mean that Telit intends to announce
such Telit products, programming, or services in your country.
Copyrights
This instruction manual and the Telit products described in this instruction manual may be,
include or describe copyrighted Telit material, such as computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit
and its licensors certain exclusive rights for copyrighted material, including the exclusive right
to copy, reproduce in any form, distribute and make derivative works of the copyrighted
material. Accordingly, any copyrighted material of Telit and its licensors contained herein or
in the Telit products described in this instruction manual may not be copied, reproduced,
distributed, merged or modified in any manner without the express written permission of Telit.
Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by
implication, estoppel, or otherwise, any license under the copyrights, patents or patent
applications of Telit, as arises by operation of law in the sale of a product.
Computer Software Copyrights
The Telit and 3rd Party supplied Software (SW) products described in this instruction manual
may include copyrighted Telit and other 3rd Party supplied computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit
and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs,
including the exclusive right to copy or reproduce in any form the copyrighted computer
program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW computer
programs contained in the Telit products described in this instruction manual may not be copied
(reverse engineered) or reproduced in any manner without the express written permission of
Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products shall not be
deemed to grant either directly or by implication, estoppel, or otherwise, any license under the
copyrights, patents or patent applications of Telit or other 3rd Party supplied SW, except for
the normal non-exclusive, royalty free license to use that arises by operation of law in the sale
of a product.
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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
by express license agreement only and may be used only in accordance with the terms of such
an agreement.
Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is
prohibited by law. No part of the software or documentation may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language or computer language,
in any form or by any means, without prior written permission of Telit
High Risk Materials
Components, units, or third-party products used in the product described herein are NOT faulttolerant and are NOT designed, manufactured, or intended for use as on-line control equipment
in the following hazardous environments requiring fail-safe controls: the operation of Nuclear
Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life
Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically
disclaim any expressed or implied warranty of fitness for such High Risk Activities.
Trademarks
TELIT and the Stylized T Logo are registered in Trademark Office. All other product or
service names are the property of their respective owners.
Copyright © Telit Communications S.p.A. 2012, 2013.
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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.
3.2.2.
3.2.3.
3.2.4.
3.2.5.
3.2.6.
3.2.7.
3.2.8.
3.2.9.
4.
GNSS Chip................................................................................................................................. 13
RF_IN ........................................................................................................................................ 13
VCC ........................................................................................................................................... 14
VBATT ...................................................................................................................................... 14
Serial Interface ........................................................................................................................... 14
SAW Filter ................................................................................................................................. 14
TCXO ......................................................................................................................................... 14
RTC ............................................................................................................................................ 14
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
Performance Characteristics ..................................................................................................... 17
4.1.
TTFF (Time to First Fix) ....................................................................................................... 17
4.1.1.
4.1.2.
4.1.3.
Hot Start ..................................................................................................................................... 17
Warm Start ................................................................................................................................. 17
Cold Start ................................................................................................................................... 17
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4.2.
AGPS ..................................................................................................................................... 17
4.2.1.
4.2.2.
4.3.
Time Mark Pulse (1PPS) ....................................................................................................... 18
4.4.
Differential Aiding ................................................................................................................ 18
4.4.1.
4.4.2.
4.5.
Adaptive Channel Management ................................................................................................. 19
Duty Cycling .............................................................................................................................. 19
4.6.
Timing ................................................................................................................................... 19
4.7.
Dead Reckoning (DR) ........................................................................................................... 20
4.8.
Performance Data .................................................................................................................. 21
4.9.
SL869-T Timing Performance Data ...................................................................................... 21
4.10.
Dynamic Constraints ......................................................................................................... 22
Electrical Requirements ............................................................................................................. 23
5.1.
Power Supply ........................................................................................................................ 23
5.1.1.
5.1.2.
VCC ........................................................................................................................................... 23
VBATT ...................................................................................................................................... 23
5.2.
External Antenna Voltage ..................................................................................................... 23
5.3.
RF (Radio Frequency) Input ................................................................................................. 23
5.4.
Antenna Gain......................................................................................................................... 23
5.5.
Burnout Protection ................................................................................................................ 23
5.6.
Jamming Performance ........................................................................................................... 24
5.7.
Flash Upgradability ............................................................................................................... 24
5.8.
Data Input/Output Specifications .......................................................................................... 24
5.8.1.
5.8.2.
5.8.3.
6.
Satellite Based Augmentation Systems (SBAS) ........................................................................ 18
RTCM ........................................................................................................................................ 18
Reduced Power Modes .......................................................................................................... 19
4.5.1.
4.5.2.
5.
Local AGPS ............................................................................................................................... 17
Server-Based AGPS ................................................................................................................... 18
Voltages and Currents ................................................................................................................ 25
DC Electrical Characteristics ..................................................................................................... 26
Pinout Description...................................................................................................................... 27
Software Interface ...................................................................................................................... 28
6.1.
NMEA Output Messages ...................................................................................................... 28
6.1.1.
6.1.2.
6.2.
Standard Messages ..................................................................................................................... 28
Proprietary Messages ................................................................................................................. 28
NMEA Commands ................................................................................................................ 28
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7.
Mechanical Drawing .................................................................................................................. 29
8.
Evaluation Kit ............................................................................................................................. 32
9.
Product Compatibility................................................................................................................ 33
10.
Product Handling .................................................................................................................... 34
10.1.
Product Packaging and Delivery ....................................................................................... 34
10.2.
Moisture Sensitivity........................................................................................................... 36
10.3.
ESD Sensitivity.................................................................................................................. 36
10.4.
Safety ................................................................................................................................. 36
10.5.
Disposal ............................................................................................................................. 36
11.
Conformity Assessment .......................................................................................................... 37
11.1.
CE Conformity Declaration ............................................................................................... 37
11.2.
R&TTE Notifed Body Opinion ......................................................................................... 38
11.3.
RoHS Declaration .............................................................................................................. 39
12.
Glossary and Acronyms ......................................................................................................... 40
13.
Safety Recommendations ....................................................................................................... 42
14.
Document History ................................................................................................................... 43
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1.
Introduction
1.1.
Scope
Scope of this document is to give an overview of SL869 GNSS family of modules.
1.2.

SL869 is a standalone GNSS module

SL869-T is a GNSS Timing module that also supports TRAIM

SL869-DR is a GNSS Dead Reckoning module that supports MEMS Gyro plus Wheel
Ticks or CAN Bus configurations
Audience
This document is intended for customers developing applications using SL869.
1.3.
Contact Information, Support
For general contact, technical support, to report documentation errors and to order manuals,
contact Telit Technical Support Center (TTSC) at:
[email protected]
[email protected]
[email protected]
[email protected]
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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1.4.
Document Organization
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 between SL869 and JN3.
“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 SL869 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 SL869.
“Chapter 15: “Document History” provides the history of the present document.
1.5.
Text Conventions
Danger – This information MUST be followed or catastrophic
equipment failure or bodily injury may occur.
Caution or Warning – Alerts the user to important points about
integrating the module, if these points are not followed, the
module and end user equipment may fail or malfunction.
Tip or Information – Provides advice and suggestions that may be
useful when integrating the module.
All dates are in ISO 8601 format, i.e. YYYY-MM-DD.
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1.6.
Related Documents

SL869 Hardware User Guide, 1VV0301001

SL869 Software User Guide, 1VV0301002

SL869 EVK User Guide, 1VV0301004

SL869 Timing Software User Guide, 1VV0301094

SL869 DR Hardware User Guide, 1VV0301xx

SL869 DR EVK User Guide, 1VV0301098
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2.
Overview
The SL869 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, Galileo and QZSS.
Operation in a high interference signal environment is common practice in today’s electronic
age. By incorporating 3-stage rejection architecture, the SL869 is able to remove interfering
signals pre- and post-correlation.
Operating on a single 3.3V power supply, this module combines a GNSS engine, TCXO, SAW
Filter, RTC and LDO. Communication is done over a UART serial port using NMEA message
format.
The SL869 shares the same form factor as the Telit Jupiter JN3 and SL869 V2 families, 16mm
x 12.2mm, commonly used in the industry.
The SL869 product family; SL869, SL869-T and SL986-DR offers default configurations to
meet specific market needs.
As a the Standard GNSS Module, the SL869 offering high sensitivity, low power
consumption, jamming immunity and fast time to first fix.
As a Timing Module, the SL869-T provides best-in-class timing performance with an
extremely stable synchronized 1PPS output and TRAIM (Time-Receiver Autonomous Integrity
Monitor) integrity monitoring.
As a DR Module, the SL869-DR receiver provides the user with accurate estimates of vehicle’s
position and velocity when GNSS information is lost or not available by combining speed and
heading sensor data into the solution. The result is improved navigation in harsh urban canyon
environments.
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3.
Technical Description
High-speed Location Engine – An ARM9 core with embedded Flash memory offers
enhanced sensitivity, fast time to first fix and improved position accuracy.
Battery Backup is supported via a separate pin for applications that use a battery backup
source.
Jammer Immunity – Three stage jamming rejection approaches, actively identify and
remove jammers pre- and post-correlation. This feature maximizes GPS performance.
High Performance Solution:
- High sensitivity navigation engine (PVT) tracks as low as -161dBm
- 32 track verification channels
- SBAS: WAAS, EGNOS, and MSAS
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3.1.
Receiver Architecture
The functional architecture of the SL869 receiver is shown in Figure 1.
ANTENNA
VBATT
VCC
1.8V
Reg
RTC
TCXO
GNSS
LNA
Flash
SAW
I2C
1PPS
UART/USB/CAN
Figure 1 SL869 Architecture
Note: LNA is included in the GNSS chip for passive antenna operation.
3.2.
Major Components
All power supply components are on board including capacitors.
3.2.1.
GNSS Chip
This single chip GNSS device includes an integrated Baseband and RF section. The LNA
amplifies the GPS signal and provides enough gain for the receiver to use a passive antenna.
A very low noise design is utilized to provide maximum sensitivity. Flash memory is
integrated so external memory is not required.
3.2.2.
RF_IN
This GNSS RF signal input supports both active and passive antennas. An external BIAS-T
and antenna voltage supply are required for an active antenna.
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3.2.3.
VCC
This is the primary 3.0V to 3.6V supply voltage for the module. The SL869 includes a
switching voltage regulator that supplies 1.8V to the GNSS device.
3.2.4.
VBATT
The Battery Backup supply voltage is 2.5V 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.
3.2.5.
Serial Interface
The SL869 host serial port is the primary communications port which outputs data and
accepts commands in NMEA format.
3.2.6.

Main Serial Interface: Standard asynchronous RX/TX 8-bit protocol on pins 20 & 21.

Secondary Serial Interface: Normally not used, but can be utilized for RTCM
differential corrections into the receiver. If debug is enabled, the debug data is output
on this port.

Tertiary Serial Interface: Hardware controlled through USB_DETECT on pin 7. This
port is only used as a USB Port. See the HW User Guide for more details.
SAW Filter
This filters the GNSS signal and removes unwanted signals caused by external influences that
would corrupt the operation of the receiver. The integrated LNA outputs to the SAW filter
which then feeds the GNSS receiver.
3.2.7.
TCXO
This highly stable 26 MHz oscillator controls the down conversion process for the RF block.
3.2.8.
RTC
The 32 KHz Real Time Clock allows Hot/Warm starts.
3.2.9.
Memory
The SL869 has an integrated 2Mbyte Flash device for operational software and satellite data
storage.
3.3.
Physical Characteristics
The SL869 receiver has advanced miniature packaging with a base metal of copper and an
Electro less Nickel Immersion Gold (ENIG) finish.
It has a tin-plated shield and 24 interface pads. These pads are castellated edge contacts.
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3.4.
Mechanical Specification
The physical dimensions of the SL869 are as follows:
-
length: 16.0 mm ± 0.1 mm
-
width: 12.2 mm ± 0.1 mm
-
thickness: 2.55 mm ± 0.22 mm
-
weight: 1 g max
Refer to Figure 2 for the SL869 mechanical layout drawing.
3.5.
External Antenna Connection
The RF connection for the external antenna has a characteristic impedance of 50 ohms.
3.6.
Input/Output and Power Connections
The I/O (Input / Output) and power connections use surface mount pads.
3.7.
Environmental
The environmental operating conditions of the SL869 are as follows:
3.8.
-
temperature: –40oC to +85oC (measured on the shield)
-
humidity: up to 95% non-condensing or a wet bulb temperature of +35oC
Compliances
The SL869 complies with the following:
-
Directive 2002/95/EC on the restriction of the use of certain hazardous substances in
electrical and electronic equipment (RoHS)
-
Manufactured in an ISO 9000: 2000 accredited facility
-
Manufactured to TS 16949 requirement (upon request)
Moreover, the SL869 module is conform to the following European Union Directives:
-
Low Voltage Directive 2006/95/EEC and product safety
-
Directive EMC 2004/108/EC for conformity for EMC
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3.9.
Marking/Serialization
The SL869 supports a 2D barcode indicating the unit serial number below. The Telit
13-character serial number convention is:
-
characters 1 and 2: year of manufacture (e.g. 13 = 2013, 14 = 2014)
-
characters 3 and 4: week of manufacture (01 to 52, starting first week in January)
-
character 5: manufacturer code
-
characters 6 and 7: product and type
-
character 8: product revision
-
characters 9-13: sequential serial number
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4.
Performance Characteristics
4.1.
TTFF (Time to First Fix)
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 4.8 for performance data.
4.1.1.
Hot Start
A hot start results from a software reset after a period of continuous navigation, or a return
from a short idle period (i.e. a few minutes) that was preceded by a period of continuous
navigation. In this state, all of the critical data (position, velocity, time, and satellite
ephemeris) is valid to the specified accuracy and available in memory.
4.1.2.
Warm Start
A warm start typically results after a period of continuous navigation is followed by an
extended period of continuous RTC operation with an accurate last known position available
in memory. In this state, position and time data are present and valid but ephemeris data
validity has expired.
4.1.3.
Cold Start
A cold start acquisition results when either position or time data is unknown. Almanac
information is used to identify previously healthy satellites.
4.2.
AGPS
GPS aiding, also known as Assisted GPS (AGPS), is a method by which TTFF is reduced
using information from a source other than broadcast GPS signals. The form of assisted GPS
data supported and used by the module is predicted ephemeris data.
Ephemeris predictions is a method of GPS aiding that effectively reduces the TTFF through
the use of predicted ephemeris data as a substitute for broadcast ephemeris data to produce a
navigation solution. In this way, every start is potentially a hot start.
There are two sources of predicted ephemeris – locally predicted ephemeris and server-based
predicted ephemeris data.
4.2.1.
Local AGPS
Proprietary algorithms within the module perform ephemeris prediction locally from captured
broadcast ephemeris data from tracked satellites. The algorithms predict ephemeris for up to
five days.
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4.2.2.
Server-Based AGPS
Server-based ephemeris predictions are generated by a third party and are maintained on Telit
AGPS servers in a file. The predicted ephemeris file is obtained from the AGPS server and is
injected into the module over the Host port. These predictions do not require local broadcast
ephemeris collection, and they are valid for up to seven days.
The module supports server-based AGPS as standard. Contact TELIT for support regarding
this service.
4.3.
Time Mark Pulse (1PPS)
For standard SL869 modules, a 1PPS time mark is output whenever the receiver has a
navigation fix of 2D fix or better. For SL869-T timing modules, the 1PPS time mark pulse is
output all the time. The 1PPS output at a 50% duty cycle, has a default pulse width of 500ms.
4.4.
Differential Aiding
The module supports differential GPS (DGPS) operation. DGPS improves position accuracy
by correcting GPS signal errors caused by ionospheric disturbances as well as timing and
satellite orbit errors.
4.4.1.
Satellite Based Augmentation Systems (SBAS)
The SL869 is capable of receiving WAAS, EGNOS, and MSAS satellite differential
corrections, which are regional implementations of SBAS for North America, Europe, and
Eastern Asia, respectively.
4.4.2.
RTCM
The SL869 accepts RTCM SC-104 standard differential corrections data, which are typically
received by an RTCM radio beacon receiver. RTCM corrections are accepted over a serial
port. The module supports message types 1 and 9.
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4.5.
Reduced Power Modes
The SL869 supports operational modes in that allow it to provide positioning information at
reduced overall current consumption.
4.5.1.
Adaptive Channel Management
The SL869 supports an adaptive channel management algorithm which dynamically switches
off a GNSS constellation and reduces the number of tracked satellites when conditions allow.
4.5.2.
Duty Cycling
The SL869 supports power cycling of the RF chain such that satellites are tracked for shorter
periods of time between positioning updates.
4.6.
Timing
The SL869-T (Timing Module) provides an independent and highly accurate 1PPS output,
synchronized to GNSS time or UTC within <20 nanoseconds (average over 24 hr. period) and
a Timing Receiver Autonomous Integrity Monitoring (TRAIM) algorithm for maintaining
PPS integrity. In addition, the 1PPS output remains accurate with only one satellite in track.

Self-Survey Mode – The accuracy and integrity of a timing solution is highly
dependent on the accuracy of the reference position. Automatic self-survey mode
offers a commanded reference position determination, cable delay compensation and
the ability to remove delays between antenna and module.

Cable Delay Compensation – The ability to compensate for RF cable loss is critical in
GNSS receivers used in accurate timing applications. The SL869 has the ability to
advance or delay the 1PPS signal to compensate for any delay in the RF path into the
receiver.

TRAIM – Timing Receiver Autonomous Integrity Monitoring is the ability of a
GNSS receiver to identify, isolate and remove from the solution any satellite that is
experiencing Time-Of-Week (TOW) transmission errors.
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4.7.
Dead Reckoning (DR)
When GPS signals are blocked (e.g. tunnels or parking structures) the SL869-DR (Dead
Reckoning) Module allows uninterrupted vehicle navigation based on heading and distance
data provided by external sensors.
The SL869-DR supports sensor or message based capability. The table below provides a list of
sensor-based DR configurations supported. In addition, an accelerometer (optional) can be used
for automatic tilt compensation for ease of installation.
Note: The CAN configurations can utilize a built-in CAN Bus translator to reduce overall BOM
cost.
Yaw Rate
Sensor
DR Configuration
Distance
Sensor
Other Sensors
MEMS Gyro
(1 or 3 axis)
Discrete
Odometer
Discrete Reverse
Signal
CAN Gyro
CAN
Odometer
CAN Reverse
Signal
Differential Wheel Pulse
(DWP)
CAN DWP
(ABS)
CAN
Odometer
CAN Reverse
Signal
Mixed
MEMS Gyro
(1 or 3 axis)
CAN
Odometer
CAN Reverse
Signal
Classic
CAN Gyro
Table 1: DR Configuration Options
Figure 2: DR Sensor Interface
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4.8.
Performance Data
Performance
Parameter
Description
Min
Typical
Max
Units
Horizontal Position Accuracy1
Autonomous
-
<1.5
-
m
GPS Only
Time to First Fix2
Hot Start
-
<1
-
s
Warm Start
-
<35
-
s
Cold Start
-
<35
-
s
Hot Start
-
<1.75
-
s
Warm Start
-
<32
-
s
Cold Start
-
<32
-
s
Acquisition
Tracking
-146
-162
-
-
dBm
dBm
Navigation
-158
-
-
dBm
Acquisition
-146
-
dBm
Tracking
-158
-
-
dBm
Navigation
-156
-
-
dBm
GPS + GLO
Time to First Fix
3
GPS Only Sensitivity
3
GPS + GLO Sensitivity
1
50%, 24 hr. static, -130 dBm, Full Power
2
Minimum 500 trials, -130 dBm
3
In-line LNA used with 1dB noise figure (NF) and 20dB gain.
Table 2 – SL869 Performance Data
4.9.
SL869-T Timing Performance Data
Simulator
PPS Accuracy
(nsec)
Open Sky
GPS Only
GPS + GLO
GPS (1 SV)
GPS Only
GPS + GLO
PPS Error (50%)
3.8
3.8
3.7
3.9
3.9
PPS Error (90%)
7.4
7.1
10.3
8.2
11.9
PPS Error (100%)
12.5
10.9
13.5
18
18.9
Table 3 – SL869 Timing (PPS) Accuracy (CDF)
Note: To calculate the CDF the RF & HW path delay is totally compensated and position hold enabled.
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4.10.
Dynamic Constraints
The SL869 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
-
altitude: 100,000 m (max) or -1500 m (min)
-
velocity: 600 m/s (max)
-
acceleration: 2 G (max)
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5.
Electrical Requirements
5.1.
Power Supply
5.1.1.
VCC
This is the main power input. The supply voltage must be in the range 3.0V to 3.6V.
Reference the HW User Guide for additional details.
5.1.2.
VBATT
The battery backup power input range is 2.5V to 3.6V. It is required for HOT/WARM starts
and retention of GPS data.
5.2.
External Antenna Voltage
The SL869 requires an external antenna Bias-T to provide the voltage to the antenna.
5.3.
RF (Radio Frequency) Input
The RF input is 1575.42 MHz to 1606 MHz (L1 Band) at a level between -135 dBm and -165
dBm into 50 Ohm impedance.
5.4.
Antenna Gain
The receiver module will operate with a passive antenna with Isotropic gain down to a
minimum of -6dBi. Active antennas are supported.
An active antenna between 20dB to 25dB (exiting the cable) will offer the best performance.
Note: The recommended total external gain range includes all external gain; antenna, external
LNA, and any passive loss due to cables, connectors, filters, matching networks, etc.
5.5.
Burnout Protection
The receiver accepts without risk of damage a signal of +10 dBm from 0 to 2 GHz carrier
frequency, except in band 1560 to 1590 MHz where the maximum level is –10 dBm.
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5.6.
Jamming Performance
In-band jammers can be detected and removed using a 3-stage approach (RF, DSP and SW)
pre-and post-correlation. This is over and above the excellent SAW filter response that exists
before the GPS LNA input.
Note: The spectral purity of oscillators and RF transmitters in the host system will determine
if harmonics are formed that are equal to the frequencies above.
Compact wireless product design requires close monitoring of jamming issues.
5.7.
Flash Upgradability
The firmware programmed in the Flash memory may be upgraded via the serial port TX/RX
pads. There are two different methods and two different firmware upgrade tools.
1. Using the TeseoII XLoader, the user can load firmware by driving the Serial BOOT
select line low at startup, then downloading the code from a PC with suitable
software. In normal operation this pad should be left floating for minimal current
drain. It is recommended that in the user’s application, the BOOT select pad is
connected to a test pad for use in future software upgrades.
2. Using the Teseo2 Firmware Upgrade Tool, the user can reflash the receiver without
driving the BOOT select line low, however this method only works if an existing
firmware is already running and the NMEA port is available.
Refer to the User Guides for additional information on both modes.
5.8.
Data Input/Output Specifications
All communications between the SL869 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 requirements are discussed in the following sections.
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5.8.1.
Voltages and Currents
Parameter



Symbol
Min
Typ
Max
Unit
Power Supply Voltage
VCC
3.0
3.3
3.6
V
Operating Temperature
TOPR
-40
85
0
Current Consumption
ICC
C
mA
Navigation/Tracking:

GPS + GLO

GPS Only

GLO Only
42
38
Acquisition:

GPS + GLO
67

GPS Only
58
Low Power Mode:

GPS + GLO
30

GPS Only
22
Battery Backup Supply
VBATT
Battery Backup Current
IBATT
2.5
3
3.6
73
V
uA
Operating temperature is ambient.
Low Power mode uses a 500ms duty cycle setting.
Table 4 – Power Requirements
Absolute Maximum Ratings
Parameter
Power Supply Voltage
Input Pin Voltage
Output Pin Voltage
Storage Temperature
Symbol
Rating
Units
VCC
3.6
V
VIO_IN
3.6
V
VIO_OUT
3.6
V
Tstg
-40°C to +85°C
0
C
Warning – Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent
damage. These are stress ratings only. Operation beyond the “Operating Conditions” is not
recommended and extended exposure beyond the “Operating Conditions” may affect device
reliability.
Table 5 – Digital Core and I/O Voltage (Volatile)
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5.8.2.
DC Electrical Characteristics
5.8.2.1.
TX and 1PPS
VOL = 0.4V MAX.
VOH = 2.9V MIN
Typical MAX current = + 12mA, -12mA.
Normal current = +100uA to +6mA (VOL), -100uA to -6mA (VOH)
VCC = 2.85V to 3.3V typical, 3.6V MAX.
Internal 10K pull-up to VCC on TX only
5.8.2.2.
RX
VIL = 0.8V MAX.
VIH = 2.0 MIN
5.8.2.3.
SDA2 and SCL2
Currently not supported in software
5.8.2.4.
VDDUSB
VIL = 0.8V MAX.
VIH = 2.0 MIN
5.8.2.5.
BOOT
For normal operation, leave this pin floating. To place the SL869 into BOOT mode, tie this
pin to Ground through a 1K pull down resistor.
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5.8.3.
Pinout Description
Details of the LGA pad functions are shown in Table 5.
Pad Number
Pad Function
Type
Description
1
CAN0TX1
O
CAN BUS TX
2
CAN0RX1
I
CAN BUS RX
3
1PPS
O
Timemark Pulse, 500ms active high
4
NC
I
No Connection
5
USB_DM2
USB/O
USB D- / UART1 TX
6
USB_DP2
USB/I
USB D+ / UART1 RX
7
USB_DETECT2
PWR
USB Detect
8
NC
9
VCC
PWR
VCC
10
GND
PWR
Ground
11
RF_IN
12
GND
PWR
Ground
13
GND
PWR
Ground
14
TX2/BOOT2
15
RX22
I
UART2 RX
16
NC
-
No connection
17
NC
-
No connection
18
SDA21
I/O
Sensor I2C Data Port
19
SCL21
I/O
Sensor I2C Clock Port
20
TX
O
UART TX
21
RX
I
UART RX
22
VBATT
PWR
Battery Backup Voltage
23
VCC
PWR
Main Supply Voltage
24
GND
PWR
Ground
-
I
O/I
No connection
GPS RF Input, 50 Ohm
UART2 TX / BOOT (at power up)
Table 6 – LGA Pad Functions
Note:
1: Above designated pins are alternate functions for DR operation.
2: Above designated pins are only utilized for DR operation.
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6.
Software Interface
The host serial I/O port of the receiver’s serial data interface supports full duplex
communication between the receiver and the user.
The default serial configuration is as follows: NMEA, 9600 bps, 8 data bits, no parity, and 1
stop bit. For timing modules the default rate is 115200 bps.
More information regarding the software interface can be found in the Software User Guide.
Customers that have executed a Non-Disclosure Agreement (NDA) with Telit Wireless may
obtain the Software Authorized User Guide, which contains additional proprietary
information about the interface. Customers under an NDA may also obtain the Timing
Software user Guide which contains additional proprietary information about the interface
with respect to the timing features available in timing modules.
6.1.
NMEA Output Messages
NMEA v2.20 is the default protocol in firmware versions prior to 3.1.6. Otherwise the
default protocol is v3.01.
6.1.1.
Standard Messages
The following messages are output by default:
-
GPRMC = 1 second update
-
GPGGA = 1 second update
-
GNGSA = 1 second update
-
GPGSV = 1 second update
-
GLGSV = 1 second update
A GNGSA message is output for each enabled GNSS constellation. By default the GPS and
GLONASS constellations are enabled. If QZSS is enabled, QZGSV messages are also output
each second when QZSS satellites are visible.
Other NMEA-defined messages are supported by the SL869, including GLL, VTG and ZDA
messages.
6.1.2.
Proprietary Messages
The SL869 supports a set of proprietary NMEA output messages which report additional
receiver data and status information on a periodic basis.
6.2.
NMEA Commands
The SL869 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.
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7.
Mechanical Drawing
Figure 2 Bottom-Side Pads
Dimensions are in mm
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Figure 3 Package Outline Drawing (Top View)
Dimensions are in mm
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1
2
3
4
5
6
7
8
9
10
11
12
(CAN0TX)
(CAN0RX)
1PPS
EXT_INT
USB_DM
USB_DP
USB_DETECT
NC
VCC
GND
RF_IN
GND
SL869
GND
VCC
VBATT
RX
TX
SCL2
SDA2
NC
NC
RX2
TX2/BOOT
GND
24
23
22
21
20
19
18
17
16
15
14
13
Figure 4 Pinout (Top View)
Figure 5 3D Model
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8.
Evaluation Kit
The SL869 Development Kit is available to assist in the evaluation and integration of the
SL869 module in custom applications. The Development Kit contains all of the necessary
hardware and software to carry out a thorough evaluation of the SL869 module.
USB Cable
Antenna
Evaluation Kit
USB Drive
Figure 6 SL869 EVK
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9.
Product Compatibility
The SL869 offers the same footprint as the J-N3 Product Family. It is pin-to-pin compatible
with the J-N3 except that the BOOT pin is relocated from pin 7 to pin 14. Pin 7 is
USB_DETECT.
The SL869 GNSS module can be used in place of a J-N3 GPS module provided that
reprogramming is not required and that the signal specifications called out in this document
are supported by the customer design.
1
2
3
4
5
6
7
8
9
10
11
12
NC
NC
1PPS
EXT_INT
NC
NC
BOOT
NC
VCC_IN
GND
RF_IN
GND
J-N3
GND
VCC_IN
VBATT
RX
TX
SCL2
SDA2
NC
NC
NC
NC
GND
24
23
22
1
2
3
21
20
4
5
19
6
18
17
16
15
7
8
9
14
10
11
13
12
l(CAN0TX)
GND
(CAN0RX)
VCC
1PPS
VBATT
SL869
EXT_INT
RX
USB_DM
TX
USB_DP
SCL2
USB_DETECT
SDA2
NC
NC
VCC
NC
GND
RX2
RF_IN
TX2/BOOT
GND
GND
24
23
22
21
20
19
18
17
16
15
14
13
Figure 7 J-N3 vs. SL869 Pin-out Differences
Note: Power Supply and Battery Back-up ranges differ as well. Refer to HW Designer Notes
for more details.
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10.
Product Handling
10.1.
Product Packaging and Delivery
SL869 modules are shipped in Tape and Reel form. The reeled modules are shipped in 24mm
reels with 1000 units per reel. Each reel is ‘dry’ packaged and vacuum sealed in a Moisture
Barrier Bag (MBB) with two silica gel packs and placed in a carton.
The minimum order quantity for shipping is 1000 units. Refer to the HW User Guide for
additional details.
All packaging is ESD protective lined. The SL869 GPS receiver is a Moisture Sensitive
Device (MSD) level 3. Please follow the MSD and ESD handling instructions on the labels
of the MBB and exterior carton (refer to sections 8.2 and 8.3).
Figure 8: Tape and Reel Packaging
SL869 modules are also available in trays. The modules are shipped in trays with 72 units per
tray. Five trays are ‘dry’ packaged and vacuum sealed in a Moisture Barrier Bag (MBB) with
silica gel pack, humidity indicator and placed in a carton.
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Figure 9: Tray Packaging
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10.2.
Moisture Sensitivity
Precautionary measures are required in handling, storing and using such devices to avoid
damage from moisture absorption. If localized heating is required to rework or repair the
device, precautionary methods are required to avoid exposure to solder reflow temperatures
that can result in performance degradation.
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.
10.3.
ESD Sensitivity
The SL869 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.
Protect sensitive devices outside the EPA using ESD protective packaging. All personnel
handling ESDS devices have the responsibility to be aware of the ESD threat to the reliability
of electronic products.
Further information can be obtained from the JEDEC standard JESD625-A, Requirements for
Handling Electrostatic Discharge Sensitive (ESDS) Devices.
10.4.
Safety
Improper handling and use of the GNSS receiver can cause permanent damage to the receiver.
There is also the possible risk of personal injury from mechanical trauma or choking hazard.
10.5.
Disposal
We recommend that this product should not be treated as household waste. For more detailed
information about recycling this product, please contact your local waste management
authority or the reseller from whom you purchased the product.
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11.
Conformity Assessment
11.1.
CE Conformity Declaration
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11.2.
R&TTE Notified Body Opinion
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11.3.
RoHS Declaration
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12.
Glossary and Acronyms
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. The almanac is a subset of
satellite ephemeris data and is updated weekly by GPS Control.
CDF: Cumulative Distributive Function; In probability theory and statistics, the cumulative
distribution function (CDF), or just distribution function, describes the probability that a realvalued random variable X with a given probability distribution will be found at a value less
than or equal to x. In the case of a continuous distribution, it gives the area under the
probability density function from minus infinity to x. Cumulative distribution functions are
also used to specify the distribution of multivariate random variables.
EGNOS: European Geostationary Navigation Overlay Service
The system of geostationary satellites and ground stations developed in Europe to improve the
position and time calculation performed by the GPS receiver.
Ephemeris plural ephemerides: A set of satellite orbital parameters that is used by a GPS
receiver to calculate precise GPS satellite positions and velocities. The ephemeris is used to
determine the navigation solution and is updated frequently to maintain the accuracy of GPS
receivers.
ESD: Electro-Static Discharge
Large, momentary, unwanted electrical currents that cause damage to electronic equipment.
GDOP: Geometric Dilution of Precision.
A factor used to describe the effect of the satellite geometry on the position and time accuracy
of the GPS receiver solution. The lower the value of the GDOP parameter, the less the error in
the position solution. Related indicators include PDOP, HDOP, TDOP and VDOP.
GPS: Global Positioning System.
A space-based radio positioning system that provides accurate position, velocity, and time
data.
LGA: Land Grid Array.
There are no pins on the chip; in place of the pins are pads of bare gold-plated copper that
touch pins on the motherboard.
Local Ephemeris prediction data. AGPS using prediction of ephemeris from live (downloaded
from satellites), ephemeris stored in memory. Useful for up to three days.
MSD: Moisture sensitive device.
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.
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Server-based Ephemeris prediction data. Eliminates the initial delay of obtaining GPS satellite
location data from the satellites themselves by using algorithms to predict seven days of
satellite location data.
WAAS: Wide Area Augmentation System
The system of satellites and ground stations developed by the FAA (Federal Aviation
Administration) that provides GPS signal corrections. WAAS satellite coverage is currently
only available in North America.
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13.
Safety Recommendations
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. The product has to be supplied with a stabilized voltage source, and
the wiring has to be conforming to security and fire prevention regulations. The product has
to be handled with care, avoiding any contact with the pins, because electrostatic discharges
may damage the product itself.
The system integrator is responsible for the functioning of the final product. Should there be
any doubt, please refer to the technical documentation and the regulations in force. Every
module has to be equipped with a proper antenna with specific characteristics. The antenna
has to be installed with care in order to avoid any interference with other electronic devices.
The European Community provides some Directives for electronic equipment introduced into
the market. All the relevant information is available on the European Community website:
http://ec.europa.eu/enterprise/sectors/rtte/documents/
The text of Directive 99/05 regarding telecommunication equipment is available, while the
applicable Directives (Low Voltage and EMC) are available at:
http://ec.europa.eu/enterprise/sectors/electrical/
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14.
Document History
Revision
0
1
Date
2012-04-26
2012-07-25
2
2012-08-08
3
2013-02-12
4
5
2013-04-10
2013-11-20
6
2014-09-15
Changes
First issue
5.8.3 and 9 added warning about USB functionality on
SL869 variants
Updated performance data, NMEA output messages, DC
electrical Characteristics, and Figure 2&3
Updated NMEA messages, signals and figures for Rev F
module.
Update height information
Added an SL869 Family of Products description.
Updated Performance and Timing Characteristics to
include new features added by recent firmware versions.
Updated/ added to Software Interface section.
Updated Timing characteristics: added §4.3, §4.6 and §4.9
Updated CE Declaration of Conformity §11.1
Updated RoHS Declaration §11.3
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