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U-blox-LEA-5S说明书.pdf
Contents
1 Functional description
1.1 Overview
1.2 Product features
1.3 GPS performance
1.4 Block diagram
1.5 Assisted GPS (A-GPS)
1.6 SuperSense Indoor GPS
1.7 KickStart / Oscillators
1.8 GALILEO
1.9 Protocols and interfaces
1.10 Antenna
1.11 Power management
1.12 Configuration
1.13 External serial EEPROM
1.14 LEA-5T
2 Mechanical specifications
2.1 Pin assignment
3 Electrical specifications
3.1 Absolute maximum ratings
3.2 Operating conditions
4 Design-in
5 Reliability tests and approvals
5.1 Reliability tests
5.2 Approvals
6 Product handling
6.1 Packaging
6.2 Shipment, storage and handling
7 Default settings
8 Labeling and ordering information
8.1 Product labeling
8.2 Explanation of codes
8.3 Ordering information
Related documents
Revision history
Contact
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17.0 x 22.4mm
LEA-5
u-blox 5 GPS Modules
Data Sheet
Abstract
Technical data sheet describing the cost effective, high-performance
u-blox 5 based LEA-5 series of GPS modules.
Features
low power consumption,
SuperSense® Indoor GPS providing best-in-class acquisition and
tracking sensitivity, precision timing and an innovative jamming-
resistant RF architecture. The compact 17.0 x 22.4 mm form factor
of the highly successful LEA-4 series is maintained, enabling easy
migration. The LEA-5 series supports passive and active antennas.
include A-GPS support,
www.u-blox.com
LEA-5 - Data Sheet
PCN reference
UBX-TN-09001-A
UBX-TN-08027
UBX-TN-08023
UBX-TN-08023
UBX-TN-08023
UBX-TN-08023
UBX-TN-09001-A
UBX-TN-08027
Type number
LEA-5H-0-008
LEA-5H-0-007
LEA-5S-0-004
LEA-5A-0-003
LEA-5Q-0-002
LEA-5M-0-002
LEA-5T-0-002
LEA-5T-0-001
ROM/FLASH version
FW6.00
FW5.00
ROM5.00
ROM5.00
ROM5.00
ROM5.00
FW6.00
FW5.00
Document Information
Title
LEA-5
Subtitle
u-blox 5 GPS Modules
Document type
Data Sheet
Document number
GPS.G5-MS5-07026-B2
Document status
This document applies to the following products:
Name
LEA-5H
LEA-5S
LEA-5A
LEA-5Q
LEA-5M
LEA-5T
This document and the use of any information contained therein, is subject to the acceptance of the u-blox terms and conditions. They
can be downloaded from www.u-blox.com.
u-blox makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make
changes to specifications and product descriptions at any time without notice.
u-blox reserves all rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without
express permission is strictly prohibited. Copyright © 2009, u-blox AG.
u-blox® is a registered trademark of u-blox Holding AG in the EU and other countries. ARM® is the registered trademark of ARM Limited in
the EU and other countries.
GPS.G5-MS5-07026-B2
Page 2 of 26
LEA-5 - Data Sheet
Contents
Contents..............................................................................................................................3
1.9.1
1.9.2
1.9.3
1.9.4
1 Functional description..................................................................................................5
1.1 Overview .............................................................................................................................................. 5
1.2
Product features ................................................................................................................................... 5
1.3 GPS performance ................................................................................................................................. 6
1.4
Block diagram....................................................................................................................................... 7
1.5 Assisted GPS (A-GPS)............................................................................................................................ 7
SuperSense Indoor GPS......................................................................................................................... 7
1.6
1.7
KickStart / Oscillators ............................................................................................................................ 7
1.8 GALILEO ............................................................................................................................................... 7
Protocols and interfaces........................................................................................................................ 8
1.9
UART............................................................................................................................................. 8
USB ............................................................................................................................................... 8
Serial Peripheral Interface (SPI)....................................................................................................... 8
Display Data Channel (DDC) .......................................................................................................... 8
Antenna............................................................................................................................................ 9
Power management.......................................................................................................................... 9
1.11.1 Operating modes .......................................................................................................................... 9
1.11.2 Maximum Performance mode ....................................................................................................... 9
1.11.3 Eco mode.................................................................................................................................... 10
1.11.4 Power Save mode........................................................................................................................ 10
1.11.5 Power states................................................................................................................................ 10
1.11.6 Peak current reduction ................................................................................................................ 10
Configuration ................................................................................................................................. 11
1.12.1 Boot-time configuration (LEA-5A, LEA-5M, LEA-5Q, LEA-5S)....................................................... 11
1.12.2 Configuration (LEA-5H, LEA-5T) .................................................................................................. 11
External serial EEPROM ................................................................................................................... 11
LEA-5T ............................................................................................................................................ 12
1.14.1 Time mode.................................................................................................................................. 12
1.14.2 Time mark................................................................................................................................... 12
1.14.3 Raw data..................................................................................................................................... 12
1.10
1.11
1.12
1.13
1.14
2 Mechanical specifications ..........................................................................................13
Pin assignment ................................................................................................................................... 14
2.1
GPS.G5-MS5-07026-B2
Page 3 of 26
LEA-5 - Data Sheet
3 Electrical specifications ..............................................................................................15
3.1 Absolute maximum ratings ................................................................................................................. 15
3.2 Operating conditions .......................................................................................................................... 16
4 Design-in.....................................................................................................................17
5 Reliability tests and approvals ..................................................................................17
5.1
Reliability tests.................................................................................................................................... 17
5.2 Approvals ........................................................................................................................................... 17
6.1
6.2
6.1.1
6.1.2
6 Product handling........................................................................................................18
Packaging........................................................................................................................................... 18
Reels ........................................................................................................................................... 18
Tapes .......................................................................................................................................... 19
Shipment, storage and handling......................................................................................................... 19
6.2.1 Moisture Sensitivity Levels ........................................................................................................... 19
Shipment..................................................................................................................................... 20
6.2.2
6.2.3
Storage and floor life................................................................................................................... 21
Drying ......................................................................................................................................... 21
6.2.4
6.2.5
Reflow soldering ......................................................................................................................... 21
ESD handling precautions............................................................................................................ 22
6.2.6
7 Default settings..........................................................................................................23
8 Labeling and ordering information...........................................................................24
8.1
Product labeling.................................................................................................................................. 24
8.2
Explanation of codes .......................................................................................................................... 24
8.3 Ordering information.......................................................................................................................... 25
Related documents ..........................................................................................................25
Revision history................................................................................................................25
Contact..............................................................................................................................26
GPS.G5-MS5-07026-B2
Page 4 of 26
LEA-5 - Data Sheet
1 Functional description
1.1 Overview
The LEA-5 module series is a family of stand-alone GPS receivers featuring the high performance u-blox 5
positioning engine. These versatile receivers feature an extensive and flexible range of functionality, connectivity
and cost savings options. LEA-5 modules maintain the industry standard 17.0 x 22.4mm form factor of the
LEA-4 series and have been designed to allow simple migration. Their ease of integration results in reduced costs
and short time to market for a wide range of automotive, consumer and industrial applications.
Available features include u-blox' KickStart weak signal acquisition technology, providing accelerated startup at
weak signals. SuperSense® Indoor GPS is capable of tracking and acquiring even extremely weak signals. An
optional built-in FLASH EEPROM enables firmware updates and the storage of specific configuration settings in a
non-volatile RAM. For cost savings an internal Read-Only Memory (ROM) is available and a crystal can be used
instead of a TCXO. The optional antenna supervisor supports external and active antennas, such as u-blox' ANN
high performance GPS antenna.
The 50-channel u-blox 5 positioning engine boasts a Time-To-First-Fix (TTFF) of under 1 second. The dedicated
acquisition engine, with over 1 million correlators, is capable of massive parallel time/frequency space searches,
enabling it to find satellites instantly. Innovative design and technology suppresses jamming sources and
mitigates multipath effects, giving LEA-5 GPS receivers excellent navigation performance even in the most
challenging environments.
LEA-5 modules are not designed for life saving or supporting devices or for aviation and should not be used in
products that could in any way negatively impact the security or health of the user or third parties or that could
cause damage to goods.
1.2 Product features
S= Supported by LEA-5H-0-008 and above
P= Planned
R= Supported by LEA-5T-0-002 and above
Table 1: Features of the LEA-5 Series
GPS.G5-MS5-07026-B2
Page 5 of 26
1.3 GPS performance
Parameter
Receiver type
Time-To-First-Fix1
Sensitivity3
Horizontal position accuracy4
Accuracy of Timepulse signal
Specification
50 Channels
GPS L1 frequency, C/A Code
GALILEO Open Service L1 frequency
Cold Start (Autonomous)
Warm Start (Autonomous)
Hot Start (Autonomous)
Aided Starts2
Tracking & Navigation
Reacquisition
Cold Start (Autonomous)
Autonomous
SBAS
RMS
99%
Compensated 5 (LEA-5T)
Time Pulse
Max navigation update rate
Velocity accuracy 6
Heading accuracy 7
Dynamics
Operational limits8
Table 2: LEA-5 GPS performance
Altitude
Velocity
LEA-5 - Data Sheet
LEA-5H/ LEA-5S/ LEA-5T/ LEA-5Q
LEA-5A/ LEA-5M
29 s
29 s
<1 s
<1 s
LEA-5H/ LEA-5S/ LEA-5T/ LEA-5Q
32s
32s
<1s
<3s
LEA-5A/ LEA-5M
-160 dBm
-160 dBm
-143 dBm
-160 dBm
-160 dBm
-144 dBm
< 2.5 m
< 2.0 m
30 ns
<60 ns
15 ns3
Configurable f = 0.25 … 999 Hz (Tp = 1/f - 1ms)
<4Hz (ROM) / 2Hz FLASH
0.1m/s
0.5 degrees
4 g
50000 m
500 m/s
1 All satellites at -130 dBm
2 Dependent on aiding data connection speed and latency
3 Demonstrated with a good active antenna
4 CEP, 50%, 24 hours static, -130dBm, SEP: <3.5m
5 Quantization error information can be used to compensate the granularity related error of the time pulse signal.
6 50% @ 30 m/s
7 50% @ 30 m/s
8 Assuming Airborne <4g platform
GPS.G5-MS5-07026-B2
Page 6 of 26
1.4 Block diagram
SAW
Filter
RF Front-End
with
Integrated LNA
Antenna
Supervision
& Supply
(optional)
TCXO or
Crystal (optional)
Power Control
RF_IN
V_ANT
AADET_N
VCC_RF
VCC_OUT
VCC
V_BACKUP
G ND
LEA-5 - Data Sheet
SPI
USB V2.0
RESET_N
CFG_xxx
UART
EXTINT
TIMEPULSE
DDC
VDDIO
Baseband Processor
Digital
IF Filter
SRAM
Power
Management
GPS/GALILEO
Engine
ROM Code
Backup
RAM
ARM7TDMI-S®
RTC
FLASH EPROM
(optional)
RTC
Figure 1: Block diagram (For available options refer to the product features table in section Error! Reference source not found..)
1.5 Assisted GPS (A-GPS)
Supply of aiding information like ephemeris, almanac, rough last position and time and satellite status and an
optional time synchronization signal will reduce time to first fix significantly and improve the acquisition
sensitivity. All LEA-5 modules support the u-blox AssistNow Online and AssistNow Offline A-GPS services and are
OMA SUPL compliant.
1.6 SuperSense Indoor GPS
All LEA-5 modules come with SuperSense, providing ultra-fast acquisition/reacquisition and exceptional tracking
sensitivity. SuperSense enables best-in-class tracking and navigation in difficult signal environments such as
urban canyons or indoor locations.
1.7 KickStart / Oscillators
An available feature is KickStart. This functionality uses a TCXO to accelerate weak signal acquisition, enabling
faster start and reacquisition times. KickStart is available with the LEA-5H, LEA-5S, LEA-5Q and LEA-5T.
1.8 GALILEO
The u-blox 5 is a GNSS chip that receives and tracks GPS and GALILEO signals simultaneously, enhancing
accuracy and coverage. When GALILEO-L1 signals become available, LEA-5H receivers will be capable of
receiving and processing them via a firmware upgrade. The ability to receive and track GALILEO satellite signals
will result in higher coverage, improved reliability and better accuracy.
GPS.G5-MS5-07026-B2
Page 7 of 26
LEA-5 - Data Sheet
1.9 Protocols and interfaces
Protocol
NMEA
UBX
Table 3: Available protocols
Type
Input/output, ASCII, 0183, 2.3 (compatible to 3.0)
Input/output, binary, u-blox proprietary
Both protocols are available on UART, USB, DDC and SPI. For specification of the various protocols see the
u-blox_5 Receiver Description including Protocol Specification [2].
LEA-5 modules support a number of peripheral interfaces for serial communication. The embedded firmware
uses these interfaces according to their respective protocol specifications. For specific applications, the firmware
also supports the connection of peripheral devices, such as external memories or sensors, to some of the
interfaces.
1.9.1 UART
LEA-5 modules include one configurable UART interface for serial communication (for information about
configuration see section 1.12).
1.9.2 USB
LEA-5 modules provide a USB version 2.0 FS (Full Speed, 12Mbit/s) interface as an alternative to the UART. The
pull-up resistor on USB_DP is integrated to signal a full-speed device to the host. The VDD_USB pin supplies the
USB interface, independently from the VDD_IO pin.
u-blox provides a Microsoft® certified USB driver for Windows XP and Windows Vista operating systems.
Windows 7 will also be supported following certification.
Operating System
Support level
Windows XP
Windows Vista
Windows 7
Certified
Certified
Certification pending
Table 4: Operating systems supported by USB driver
1.9.3 Serial Peripheral Interface (SPI)
An SPI interface is planned for future versions of LEA-5 modules.
The SPI interface allows for the connection of external devices with a serial interface, e.g. EEPROM or A/D
converters, or to interface to a host CPU. The interface can be operated in master or slave mode. In master
mode, two chip select signals are available to select external slaves. In slave mode a single chip select signal
enables communication with the host.
1.9.4 Display Data Channel (DDC)
The I2C compatible DDC interface can be used either to access external devices with a serial interface (e.g.
EEPROM or A/D converters) or to interface with a host CPU. It is capable of master and slave operation and
communicates at a rate of <100kbit/s.
GPS.G5-MS5-07026-B2
Page 8 of 26
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