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GNSS receiver achieves cascaded NF of 1.4dB

Posted: 02 Jul 2007 ?? ?Print Version ?Bookmark and Share

Keywords:GNSS receiver for GPS? navigation satellite system? ADC? GPS?


Maxim Integrated Products introduces the MAX2769, the industry's first universal, single-chip global navigation satellite system (GNSS) receiver for GPS (L1 C/A code and P-code), Galileo and GLONASS navigation satellite systems. Due to integration of a complete receiver chain, including an LNA, this receiver eliminates the need for an external LNA and achieves a total cascaded noise figure (NF) of 1.4dB. MAX2769 is suitable for different applications including automotive navigation, asset tracking, cellular handsets, portable navigation devices (PNDs), digital cameras, laptops and ultra-mobile personal computers (UMPCs).

Designed using Maxim's advanced, low-power SiGe BiCMOS process technology, MAX2769 offers the industry's highest performance and integration at a low cost. Incorporated on the chip is a complete receiver chain, including a dual input LNA and mixer, image-rejected filter, VGA, VCO, fractional-N frequency synthesizer, crystal oscillator and multibit ADC. Through this high level of integration, MAX2769 eliminates the need for an external LNA in passive antenna applications and also the need for external IF SAW filters. Consequently, it requires only a few external components to form a complete low-cost GPS receiver solution that achieves a total cascaded NF as low as 1.4dB.

MAX2769 is the most flexible receiver on the market, said Maxim. The integrated delta-sigma fractional-N frequency synthesizer enables IF-programming with 40Hz accuracy while operating with any reference or crystal frequency that is available in the host system. The integrated ADC outputs one or two quantized bits for both I and Q channels or three quantized bits for the I channel. Output data is available either at CMOS or at limited-differential logic levels. MAX2769 is designed to work with most GPS baseband processors on the market.

MAX2769 is specified for operation over the -40 degrees Celsius to +85 degrees Celsius temperature range. This receiver is packaged in a compact, 5mm x 5mm, 28-pin TQFN with an exposed paddle; a tested die version is also available. Prices start at $2.95 (1000-up, FOB USA).

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