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Anleitung Zusammenfassung
Huang Add revision history; Modify operating temperature range and outlook dimension tolerance ALL INFORMATION CONTAINED HEREIN IS THE SOLE PROPERTY OF LEADTEK RESEARCH AND CANNOT BE DISSEMINATED WITHOUT THE EXPRESS WRITTEN CONSENT OF LEADTEK RESEARCH. i LR9805ST Specifications Sheet Rev. 0.9 Introduction The Leadtek LR9805ST GPS module is a high sensitivity, low power, Surface Mount Device (SMD). This 12-channel global positioning system (GPS) receiver is designed for a broad spectrum of OEM applications and is based on the fast and deep GPS signal search capabilities of SiRFstarII™ single chipset. As the single chip version of the LR9805T, The LR9805ST is pin-to-pin compatible with the LR9805-T for easier and faster transition. The LR9805ST is designed to allow quick and easy integration into GPS-related applications such as: PDA, Pocket PC, and other computing devices Car and Marine Navigation Fleet Management /Asset Tracking AVL and Location-Based Services Hand-Held Device for Personal Positioning and Navigation Features Hardware and Software Based on the high performance features of the SiRFstarII single chipset Compact module size for easy integration: 24x20x2.9 mm (0.94x0.79x0.11 in) Fully automatic assembly: reflow solder assembly ready Hardware compatible with SiRFXTrac software Multiple I/O pins reserved for customizing special user applications RoHS compliance Performance Cold/Warm/Hot Start Time: 45/38/4 sec at open sky and stationary environments Reacquisition Time: 0.1 second RF Metal Shield for best performance in noisy environments Multi-path Mitigation Hardware © 2008 Leadtek Research Inc. All rights reserved. Page 2/12 Preliminary Confidential - Information is subject to change without prior notice. LR9805ST Specifications Sheet Rev. 0.9 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 Secure SMD PCB mounting method © 2008 Leadtek Research Inc. All rights reserved. Page 3/12 Preliminary Confidential - Information is subject to change without prior notice. LR9805ST Specifications Sheet Rev. 0.9 Reference Design All ground pads attach directly to ground plane by way of via. All components are reference only. © 2008 Leadtek Research Inc. All rights reserved. Page 4/12 Preliminary Confidential - Information is subject to change without prior notice. LR9805ST Specifications Sheet Rev. 0.9 Specifications Technical Specifications Feature Item Chipset GSC2x Series SiRFstarII single chip technology General Frequency L1, 1575.42 MHz C/A code 1.023 MHz chip rate Channels 12 Accuracy Position 10 meters, 2D RMS 5 meters 2D RMS, WAAS corrected <5meters(50%), DGPS corrected Velocity 0.1 meters/second Time 1 microsecond synchronized to GPS time Datum Default WGS-84 Other selectable for other Datum Time to First Fix (TTFF) Reacquisition 0.1 sec., average( Open Sky and Stationary Environment ) Hot start Warm start 4 sec., average typical TTFF 38 sec., average typical TTFF Cold start 45 sec., average typical TTFF Dynamic Conditions Altitude 18,000 meters (60,000 feet) max. Velocity 515 meters/second (1000 knots) max. Acceleration 4g, max. Jerk 20 meters/second3, max. Power Main power input 3.2 ~ 5.0 VDC input Power consumption .106 mW (continuous mode) Supply Current .32 mA Backup Power 1.65 ~ 5.0 VDC input. Serial Port Electrical interface Two full duplex serial TTL interface. Protocol messages NMEA-0183@4800 bps (Default) Time-1PPS Pulse Level TTL The 1PPS pulse width is 1 .s, this 1PPS is Pulse duration NOT suited to steer various oscillators (timing receivers, telecommunications system, etc). Time reference At the pulse positive edge. Measurement Aligned to GPS second, ±1 microsecond Description © 2008 Leadtek Research Inc. All rights reserved. Page 5/12 Preliminary Confidential - Information is subject to change without prior notice. LR9805ST Specifications Sheet Rev. 0.9 Environmental Characteristics Items Description Operating temperature range -30 deg. C to +85 deg. C Storage temperature range -55 deg. C to +100 deg. C Physical Characteristics Items Length Width 20 mm (0.79 in) Height 2.9 mm (0.11 in) Weight 2.5g Interface Specifications Description 24 mm (0.94in) Items Description I/O 28 pin SMD micro package © 2008 Leadtek Research Inc. All rights reserved. Page 6/12 Preliminary Confidential - Information is subject to change without prior notice. LR9805ST Specifications Sheet Rev. 0.9 Software The Leadtek LR9805ST module includes SiRFXTrac high sensitivity software solution. Features include: High tracking sensitivity (-154 dBm) High configurability 1 Hz position update rate Real-time Operating System (RTOS) friendly Capable of outputting both NMEA and ...