Portable Tracking Systems Supported Ultra Low Power GPS Modules

Published:2011/8/1 2:32:00 Author:Amy From:SeekIC

Line One’s new family of GPS modules provides designers an ultra low power solution to achieve high accuracy position, speed and time information from the Global Positioning System (GPS).

The XE1610-OEMPVT from Xemics is a fully autonomous GPS receiver and it is suitable for applica­tions including automotive GPS sys­tems, asset management/ track­ing and portable appliances.

The XE1610-OEMPVT uses an ultra low power IC design, with optimized RF and DSP architec­tures. It features a current con­sumption of under 20 mA at 3.3 V, when operating at full power, with three additional low power modes also available. On-board RAM handles storage for the GPS navigation data and temporary configuration changes while on-board Flash provides a non volatile storage for the GPS almanac, ephemeris and permanent profile changes. Based on the Trimble FirstGPS architecture, the XE1610-OEM-PVT provides a high level of sen­sitivity (to -143 dBm tracking) and positional accuracy (less than 5 m CEP without SA, in the horizontal axis). The XE1610-OEMPVT can provide time and positional information under 12 seconds, in hot start operation, and under 40 seconds from a warm start.

Designed for simple integration into embedded systems, the XE1610-OEMPVT has a direct digital interface that supports standard bidirectional NMEA-0183 data sentences via a logic level serial port, as well as XEMICS vendor specific sen­tences. Trimble’s FirstGPS solu­tion includes GPS software libraries which, in the XE1610-OEMPVT, run on a low power ARM7TDMI microcontroller from Atmel.

The XE161OOEMPVT helps con­serve the system power budget even further via the provision of three simple power saving modes. These modes are: Power Save mode, in which both the RF section and GPS engine are powered down; Stand-by mode, whereby the MCU clock is also turned off while the main power supply remains on, with the real­time clock (RTC) running; and Power Down mode, in which the main power supply is also turned off, leaving the RTC run­ning on the back-up supply. It is an ideal option for any handheld or bat­tery operated equipment requir­ing high accuracy time or posi­tional information.

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