Wireless Systems Design

Miniature GPS Module Flaunts Very Low Power

Between enhanced-911 (e-911) requirements and the rise of location-based services, Global Positioning Systems (GPSs) are becoming more commonplace in mobile devices. To feed this growth, Trimble debuted an ultra-low-power, miniature GPS receiver. The 12-channel Lassen iQ module features two GPS signal-sensitivity modes: Standard and Enhanced.

When Enhanced mode is enabled, the module will automatically switch to higher sensitivity if satellite signals are weak. For fast acquisition, the module supports the Trimble Standard Interface Protocol (TSIP) download of critical startup information. This aided-GPS startup provides hot-start performance for each power-up.

In continuous operation, Trimble's Lassen iQ power-saving module requires less than 90 mW at 3.3 VDC. The module's ultra-low power gives developers the flexibility to achieve significant reductions in power consumption while adding GPS capability. Thanks to the Lassen iQ module's postage-stamp size (~26 × 26 × 6 mm), integrators should be able to easily fit GPS functionality into a variety of mobile products.

By incorporating Trimble's patented FirstGPS technology along with a powerful microprocessor in a small form factor, the Lassen iQ forms a complete position, velocity, and time (PVT) solution. The module comprises a small board containing a GPS hardware core. That core is based on Trimble's Colossus RF application-specific integrated circuit (ASIC) and IO-S digital-signal-processor (DSP) design. It also includes a 32-b RISC CPU. For complete processing capability, the module offers on-board data storage in Flash memory.

The Lassen iQ module is compatible with active 3.3-VDC antennas. The module and developers kit are expected to be available this quarter. Please contact the company for more information.

Trimble Navigation Ltd.
749 N. Mary Ave., Sunnyvale, CA 94085; www.trimble.com.

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