QLEADTEK 9548SLP User Manual
LEADTEK GPS MODULE
GPS 9548SLP
Specifications Sheet
Features:
SiRF StarIII low power
chipset
Compact module size for easy
integration : 24 x 20 x 2.9 mm
Multiple I/O pins reserved for
customizing special user
applications
RoHS compliance (lead-free)
ALL INFORMATION CONTAINED HEREIN IS THE SOLE PROPERTY OF LEADTEK RESEARCH AND CANNOT BE
DISSEMINATED WITHOUT THE EXPRESS WRITTEN CONSENT OF LEADTEK RESEARCH.
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LR9548SLP Specifications Sheet Rev. 0.1
Introduction
The Leadtek LR9548SLP GPS module is a high sensitivity, low power, Surface Mount Device (SMD).
This 20-channel global positioning system (GPS) receiver is designed for a wide range of OEM
applications and is based on the GPS signal search capabilities of the SiRFstarIII™ low power single
chipset, SiRF’s newest chipset technology. The LR9548SLP is also pin-to-pin compatible with the
LR9805-III (LR9548) for easier and faster transition.
The LR9548SLP is designed to allow quick and easy integration into GPS-related applications such
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as:
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PDA, Pocket PC, and other computing devices
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Car and Marine Navigation
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Fleet Management /Asset Tracking
AVL and Location-Based Services
Hand-Held Device for Personal Positioning and Navi gation
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Features
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Hardware and Software
Based on the high performance features of the SiRFstarIII low power single chipset
Compact module size for easy integration: 24x20x2.9 mm (0.94x0.79x0.11 in)
Fully automatic assembly: reflow solder assembly re ady
Hardware compatible with SiRF GSW3 v3.2.2 software
Multiple I/O pins reserved for customizing special user applications
RoHS compliance
Performance
Cold/Warm/Hot Start Time: 42/38/1 sec. at open sky and stationary environments.
Reacquisition Time: 0.1 second
RF Metal Shield for best performance in noisy environments
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Multi-path Mitigation Hardware
© 2006 Leadtek Research Inc. All rights reserved. Page 1/11
Preliminary Confidential - Information is subject to change without prior notice.
LR9548SLP Specifications Sheet Rev. 0.1
Interface
TTL level serial port for GPS communications interface
Protocol: NMEA-0183/SiRF Binary (default NMEA)
Baud Rate: 4800, 9600, 19200, 38400 or 57600 bps (default 4800)
Advantages
Ideal for high volume mass production(Taping reel package)
Cost saving through elimination of RF and board to board digital connectors
Flexible and cost effective hardware design for different application needs
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Secure SMD PCB mounting method
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© 2006 Leadtek Research Inc. All rights reserved. Page 2/11
Preliminary Confidential - Information is subject to change without prior notice.
LR9548SLP Specifications Sheet Rev. 0.1
Specifications
Technical Specifications
Feature Item Description
Chipset
General
Accuracy
Datum
Time to First Fix
(TTFF)
(Open Sky &
Stationary
Requirements)
Dynamic
Conditions
Power
Serial Port
Time-1PPS
Pulse
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GSC3f SiRFstarIII low power single chipset
Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 20
Position
Velocity 0.1 meters/second
Time 1 microsecond synchronized to GPS time
Default WGS-84
Other selectable for other Datum
Reacquisition 0.1 sec., average
Snap start 1 sec., average
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Hot start 1 sec., average typical TTFF
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Warm start 38 sec., average typical TTFF
Cold start 42 sec., average typical TTFF
Altitude 18,000 meters (60,000 feet) max.
Velocity 515 meters/second (1000 knots) max.
Acceleration 4g, max.
Jerk 20 meters/second3, max.
Main power input 3.3 ~ 5.0 VDC input
Power consumption
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Supply Current
Backup Power 1.65 ~ 5.0 VDC input.
Electrical interface Two full duplex serial TTL interface.
Protocol messages NMEA-0183@4800 bps (Default)
Level TTL
Pulse duration The 1PPS pulse width is 1 µs, this 1PPS is
Time reference At the pulse positive edge.
Measurement
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10 meters, 2D RMS
5 meters 2D RMS, WAAS corrected
<5meters(50%)
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≈165 mW (continuous mode)
≈49 mA
NOT suited to steer various oscillators
(timing receivers, telecommunications
system, etc).
Aligned to GPS second, ±1 microsecond
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© 2006 Leadtek Research Inc. All rights reserved. Page 3/11
Preliminary Confidential - Information is subject to change without prior notice.
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