Jupiter 32 xLP
Extra Low Power
Miniature 20-channel
GPS receiver module
Data Sheet
Related documents
• Jupiter 32 xLP Product brief
LA000268
• Jupiter 32 Integrator’s manual
LA000605
• Jupiter Development kit guide
LA000645
• Low power operating modes
application note LA000513
• Navman NMEA reference manual
MN000315
• SiRF Binary protocol reference
manual, MN000314
LA000267D © 2008 Navman Wireless OEM. All rights reserved. Proprietary information and specifications subject to change without notice.
Contents
Related documents ................................................................................................. 1
1.0 Introduction ....................................................................................................... 4
2.0 Technical description ....................................................................................... 4
2.1 Product applications
..................................................................................................... 4
2.1.1 Compatibility
.............................................................................................................. 5
2.2 Receiver architecture
................................................................................................... 5
2.3 Major components of the Jupiter 32 xLP
...................................................................... 5
2.4 Physical characteristics ................................................................................................ 6
2.5 Mechanical specification
.............................................................................................. 6
2.6 External antenna surface mount pads
......................................................................... 6
2.7 I/O and power connections...........................................................................................
6
2.9 Compliances ................................................................................................................ 6
2.10 Marking/Serialization
.................................................................................................. 7
3.0 Performance characteristics ........................................................................... 7
3.1 TTFF (Time To First Fix)
............................................................................................... 7
3.1.1 Hot start
................................................................................................................ 7
3.1.2 Warm start
............................................................................................................ 7
3.1.3 Cold start
.............................................................................................................. 7
3.2 Acquisition times
.......................................................................................................... 7
3.3 Timing 1 PPS output
..................................................................................................... 8
3.4 Power management
..................................................................................................... 8
3.4.1 Adaptive TricklePower
.......................................................................................... 8
3.4.2 Push-To-Fix mode
................................................................................................ 8
3.5 Differential aiding
......................................................................................................... 8
3.5.1 Differential GPS (DGPS)
...................................................................................... 8
3.5.2 Satellite Based Augmentation Systems (SBAS)
................................................. 8
3.6 Core processor performance
....................................................................................... 8
3.7 Sensitivity
..................................................................................................................... 9
3.8 Dynamic constraints
..................................................................................................... 9
3.9 Position and velocity accuracy
..................................................................................... 9
4.0 Multi-mode aiding ............................................................................................. 9
5.0 Electrical requirements .................................................................................. 10
5.1 Power supply
...............................................................................................................10
5.1.1 Primary power
......................................................................................................10
5.1.2 Battery backup (SRAM/RTC backup)
..................................................................10
5.1.3 VCC_RF power supply
........................................................................................10
5.1.4 External antenna voltage
.....................................................................................10
5.1.5 RF (Radio Frequency) input
.................................................................................10
5.1.6 Antenna gain........................................................................................................11
5.1.7 Burnout protection
...............................................................................................11
5.1.8 Jamming performance .........................................................................................11
5.1.9 Flash upgradability
..............................................................................................11
5.1.10 Reset input
.........................................................................................................11
LA000267D © 2008 Navman Wireless OEM. All rights reserved. Proprietary information and specifications subject to change without notice.
5.2 Data input output specifications
..................................................................................11
5.2.1 Voltage levels
......................................................................................................12
5.2.2 I/O surface mount pads
......................................................................................12
6.0 Software interface .......................................................................................... 14
6.1 NMEA output messages
..............................................................................................14
6.2 SiRF Binary .................................................................................................................14
6.3 Software functions and capabilities
.............................................................................14
7.0 Jupiter 32 xLP mechanical drawing .............................................................. 15
8.0 Jupiter 32 xLP evaluation kit.......................................................................... 16
9.0 Product handling ............................................................................................ 16
9.1 Product packaging and delivery
..................................................................................16
9.2 Moisture sensitivity
......................................................................................................16
9.3 ESD sensitivity
............................................................................................................16
9.4 Safety ..........................................................................................................................16
9.5 Disposal.......................................................................................................................16
10.0 Ordering information .................................................................................... 17
11.0 Glossary and acronyms................................................................................ 17
Figures
Figure 2-1: Jupiter 32 xLP architecture
............................................................................... 5
Figure 7-1: Jupiter 32 xLP mechanical layout
....................................................................15
Tables
Table 3-1: Acquisition times at –125 dBm and -140 dBm
.................................................... 7
Table 3-2: Sensitivity
.......................................................................................................... 9
Table 3-3: Position and velocity accuracy
.......................................................................... 9
Table 5-1: Operating power for the
Jupiter 32 xLP
............................................................10
Table 5-2: Typical jamming performance
..........................................................................11
Table 5-3: Interface voltage levels
....................................................................................12
Table 5-4: Jupiter 32 xLP Module pad functions
...............................................................13
Table 6-1: Default NMEA messages
.................................................................................14
Table 6-2: Jupiter 32 xLP software capability
...................................................................14
Table 10-1: Jupiter 32 xLP ordering information
................................................................17
LA000267D © 2008 Navman Wireless OEM. All rights reserved. Proprietary information and specifications subject to change without notice.
1.0 Introduction
Navman’s Jupiter 32 xLP extra low power receiver module has been designed to address
markets where performance, size, power and flexibility are very important. A miniature
successor to the ultra sensitive Jupiter 30, the Jupiter 32 xLP is Navman’s smallest, lowest
power consumption, autonomous, fully featured GPS receiver yet.
The Jupiter 32 xLP offers the ultimate in high sensitivity GPS performance, capable of both
autonomous and aided modes of operation. The module has advanced miniature packaging
and a Land Grid Array (LGA) footprint with unique integration features for high volume, low
cost and low power applications where tighter integration is required.
Incorporating the highest specification components available, the Jupiter 32 xLP can track
down to –159 dBm and offers unparalleled accuracy and extremely fast fixes even under
attenuated conditions such as in built-up urban areas, dense foliage, indoors or while subject
to challenging temperature profiles. The module provides a miniature 20-channel receiver that
continuously tracks all satellites in view and provides accurate positioning data.
Featuring active or passive antenna support, Write-to-Flash configuration, power saving
modes, SiRFInstantFix support and full multi-mode aiding capability, the Jupiter 32 xLP is
highly suited for all battery powered applications or high-end track and trace applications.
2.0 Technical description
Navman has enhanced the architecture of the SiRF GSC3f chipset by adding carefully
selected key components including TCXO and LNA. This ensures frequency stability, improved
sensitivity at low level signals down to –159 dBm, lower power consumption and a faster TTFF
(Time To First Fix). The GSC3f chip integrates baseband, RF sections and Flash memory,
thereby reducing power consumption and size. Integrated 4 Megabit flash memory gives the
user the ability to store configurations permanently.
By providing separate on-board regulators, the Jupiter 32 xLP allows operation over a wide
input voltage range, down to 3.0 VDC. This gives OEMs the ability to design with a single
voltage supply that consumes less power.
The 20-channel architecture with more than 200 000+ effective correlators provides rapid
TTFF under all start-up conditions. Acquisition is guaranteed under all conditions due to higher
sensitivity and the ability to use multi-mode aiding.
Protocols supported are selected NMEA (National Marine Electronics Association) data
messages and SiRF Binary.
2.1 Product applications
The Jupiter 32 xLP is designed specifically for applications where rapid TTFF and operation
under low signal levels along with a small form factor are primary requirements. The module
offers high performance and maximum flexibility in a wide range of OEM configurations.
The high sensitivity of the module makes it ideal for:
•
navigation systems – where athermic glass, or an unsuitably positioned antenna inside
the vehicle will reduce visibility and signal strength
•
vehicle and people tracking devices – where satellites are obstructed by partially
covered car parks and walkways, tracking even continues indoors
•
marine buoys – where multipath and unstable sea conditions make satellite visibility
irregular
•
asset tracking – where construction machinery is located in covered yards and areas of
dense foliage
•
people tracking - home detention and house arrest applications, emergency location
services
LA000267D © 2008 Navman Wireless OEM. All rights reserved. Proprietary information and specifications subject to change without notice.
1.9 - 3.6 V
battery
power
active or passive antenna
V_ANT
input
regulator
LNA
switch
LNA_EN
TCXO
XTAL_IN
GSC3f LPx
combined RF/baseband device/4 Mb Flash device
RFIN
VCC_RF VDD_BB
3 - 3.6 V in
main
power
OR-ing
circuit
bias T
brown-out
detector
2.9 V threshold
SRESET
VDD_RTC
regulator
VDD_RTC
LNA
SAW
filter
RTC crystal
controls/
GPIO
UART
ports
Figure 2-1: Jupiter 32 xLP architecture
2.1.1 Compatibility
The Jupiter 32 xLP is 100% backward compatible to Jupiter 32 and identical in function and
electrical compatibility to the Jupiter 30 but has advanced miniature packaging, with a smaller
form factor (17.0 x 15.0 mm). It features the ability to save user configurations to flash memory
and uses the latest SiRFInstantFix technology for improved performance.
2.2 Receiver architecture
The functional architecture of the Jupiter 32 xLP receiver is shown in Figure 2-1.
2.3 Major components of the Jupiter 32 xLP
Bandpass SAW filter (1.575 GHz):
This filters the GPS signal and removes unwanted signals
caused by external influences that would corrupt the operation of the receiver. The filtered signal
is fed to the RF input of GSC3f chipset for further processing. The filter has a bandwidth of
2 MHz.
Battery power:
The back-up battery supply feeds the VDD_RTC regulator through the OR-ing
circuit, and provides the power to the battery-backed SRAM and the RTC section of the GSC3f.
Bias T:
This provides the voltage to an external active antenna.
Brown out detector:
The precision voltage detector chip senses the input voltage and resets
the module in case of any drop in the voltage. This detector chip also serves the function of
power-on-reset.
GSC3f chip:
This single chip GPS device includes an integrated Baseband, RF section and
integrated Flash which stores software, long term and user configuration data.
LNA (Low Noise Amplifier):
This amplifies the GPS signal and provides enough gain for the
receiver to use a passive antenna. A very low noise design is utilised to provide maximum
sensitivity.
LNA switch:
The LNA switch controls the LNA during low power modes.
Main power:
The primary supply voltage range is 3.0 to 3.6 V.
OR-ing circuit:
This circuit distributes the RTC/SRAM voltage from either the main voltage
supply or the back-up voltage input in order for the RTC/SRAM elements to work in low power
and continuous modes. However a back-up voltage must be connected if the device is to be shut
down and required to perform Hot and Warm starts.
Regulator:
This dual low-noise regulator provides two outputs of 2.85 V power to the RF section
and the digital IO section of the GSC3f chip.
LA000267D © 2008 Navman Wireless OEM. All rights reserved. Proprietary information and specifications subject to change without notice.
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