ACCUEIL L'ENTREPRISE ACTUALITE SUPPORT CONTACTS GPS USB PCMCIA Cartes de communication Cartes mémoires Flash Stockage OEM Modules DRAM Composants mémoires Programmateurs Service programmation   Solutions GPS   RECEPTEURS Copernicus Lassen DR+GPS Lassen SK-II Lassen LP Lassen iQ Lassen SQ NLC-SKII TIMING Acutime Gold Mini-T Resolution T BOITIERS GPS NLC-232 NLC-422 SURVEILLANCE TrimTrac TrailTrac Trailer Box ANTENNES Bullet III Hardmount Antennes miniatures Série NGA ACCESSOIRES Ré-émetteur GPS LG Kit Meca Câbles RF Lassen LP Low power module for portable applications   datasheet   Introduction Trimble’s Lassen™ LP GPS is a low power miniature GPS receiver module that is ideal for power-conscious portable applications. It is intended specifically for system designers and integrators who are developing the next generation of portable devices. This embedded technology gives the system developer the programming flexibility to achieve a significant reduction in power consumption. Power management The Lassen LP GPS features a new set of power management tools that puts the power budget decision in the developer’s hands. The developer now can determine the best balance between operational frequency and power conservation for a particular application. In Schedule Track™ operating mode, the developer can program the unit to power up, quickly acquire satellites and output position to a schedule. After gathering satellite data and computing its location, the receiver may be directed to power down to a minimal mode of operation for a programmed interval or until awakened by a hardware interruption. Schedule Track provides hot start performance at a programmed interval or in response to a hardware event. Schedule Track mode provides an advantage over normal battery-backed fast start modes with automatic wakeup to maintain current satellite data for fastest possible acquisition. Schedule Track offers the lowest power consumption in a deep sleep mode but provides position data as quickly as possible when needed. Ease of integration Lassen LP GPS provides a choice of data protocols for maximum flexibility. The TSIP binary data protocol incorporates new power management features and provides maximum control over system operation. The TAIP and NMEA protocols are available where ASCII data is preferred. A secondary serial input port is available for RTCM SC-104 differential correction data for high accuracy applications. The Lassen LP GPS also incorporates Trimble’s antenna detection and protection circuit to monitor the condition of the antenna system. And high performance, miniature 3.3 V antennas are available for the Lassen LP GPS. Getting Started The Lassen LP Starter Kit provides everything you need to get started integrating state-ofthe- art GPS capability into your application. Lassen LP Technical Data Performance Specifications : General: L1 frequency, C/A code (SPS), 8-channel, continuous tracking receiver, 32 correlators Update rate: TSIP @ 1Hz; NMEA @ 1Hz; TAIP @ 1Hz Accuracy: Horizontal: <6 meters (50%), <9 meters (90%) Altitude: <11 meters (50%), <18 meters (90%) Velocity: 0.06 m/sec PPS: ±95 nanoseconds DGPS accuracy: Position: 2m CEP (50%) Velocity: 0.05 m/sec (1 sigma) Acquisition: Hot start: <15 seconds (90%) Warm start: <42 seconds (90%) Cold start: <130 seconds (90%) Cold start requires no initialisation. Warm start requires last position, time and almanac saved in battery back-up memory. Hot start requires that the ephemeris also saved. Reacquisition: <2 seconds (90%) Dynamics: Acceleration: 4g (39.2 m/sec²) Motional Jerk: 20 m/sec³ Operational limits: Altitude <18,000m or velocity <515 m/sec Either limit may be exceeded but not both. Environmental Specifications : Operating temp: – 40°C to +85°C (standard) Storage temp: –55°C to +100°C Vibration: 0.008 g²/Hz 5Hz to 20Hz 0.05 g²/Hz 20Hz to 100Hz -3dB/octave 100Hz to 900Hz Operating Humidity: 5% to 95% R.H. non-condensing, @ +60°C Electrical Characteristics: Prime power: +3.3V DC, ±0.3V Consumption: Normal operations : GPS board only: 55mA, 0.182W With antenna: 67mA, 0.221W Deep Sleep : 8mA, board only Back-up power: +3.0 to +3.6V DC 2-5µA @ +25°C (nominal) Antenna power: 3.3V at 12mA available Open-circuit detection Short-circuit protection Interface Characteristics: Serial ports/1PPS: CMOS TTL levels Supported Protocols: TSIP @ 9600 baud, 8-Odd-1 (configurable) TAIP @ 4800 baud, 8-None-1 (configurable) NMEA 0183 v2.1 @ 4800 baud, 8-None-1 (configurable) RTCM SC-104 @ 4800 baud, 8-None-1 NMEA messages: GGA, VTG, GLL, ZDA, GSV, GSA and RMC Messages selectable by TSIP command; selection stored in non-volatile memory Physical Characteristics: Dimensions: 2.605" L x 1.250" W x 0.475" H (66.167mm x 31.750mm x 12mm) Weight: 0.4 oz. (12.5 g) without optional shield Connectors: RF: right angle MCX I/O: 8-pin (2x4), 2mm header © Naelcom 2008 - Haut de la page