SiRFstarIV GSD4e - High-sensitivity GPS Location Processor with Built-in CPU and SiRFaware Technology
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Make the leap to the SiRFstarIV™ platform with SiRFaware™ GPS technology and create exciting consumer products that always know where they are. With a built-in CPU and extremely low power consumption, the GSD4e can get fast location fixes all day for geo-tagging images or videos, playing location-based games, or searching for friends at the mall. At the same time, the GSD4e lowers BOM costs and risk while delivering industry-leading GPS performance in a compact solution.
Key Features
Fast, Responsive Location Experience
- High-sensitivity navigation engine (PVT)
- tracks as low as -163 dBm
- Adaptive accuracy and SiRFGeoRecov™
- 48 track verification channels
- SBAS (WAAS, EGNOS, MSAS, GAGAN)
- Breakthrough Micropower Technology
- Requires only 50 – 500 μA to maintain
- hot start capability
- Active Jammer Remover
- Removes in-band jammers up to
- 80 dB-Hz
- Tracks up to eight CW jammers
Built-in Processor
- No host dependency
- ARM7 @ 109 MHz
- ROM or external flash support
Easy, Cost-saving Integration
- Single 1.8 V supply (3.3 V tolerant I/O)
- Low cost crystal support
- Minimal external BOM: 5-6 passives,
- single SAW, integrated LNA
- Host i2c, SPI, UART supported
- Custom configuration settings
Highlighted Advantages
SiRFaware technology means never having to maintain full power to achieve maximum performance nor turning the GPS receiver completely off to save power. It breaks the old GPS performance vs. power trade-off through the fusion of a new high-performance GPS engine, advanced power management, and a smart sensor interface to achieve high sensitivity hot-start conditions for fast location fixes while drawing only 50-500 μA.
Premium on-chip software provides a new level of continuous location awareness by employing the following advanced technology:
- Opportunistic ephemeris decode and advanced power management allow the GPS receiver to stay in a hot-start condition nearly continuously while consuming very little power
- Local ephemeris prediction, capturing ephemerides, and predicting them three days to one week in advance boosts sensitivity and performance
- Dynamic contextual awareness, temperature monitoring, and MEMS sensors work in concert to conserve power and boost performance.
The GSD4e serves the traditional GPS engine market by generating a PVT solution via its 109 MHz ARM7 CPU without relying on host processing power or other resources.
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