Integrated L1-Band GPS Receiver

The MAX2741 L1-band GPS receiver IC offers a high-performance, compact solution for mobile handsets and PDA applications. Total voltage gain of 80dB and a 4.7dB cascaded noise figure can provide receiver sensitivity for applications requiring -185dBW for indoor tracking solutions.

This dual-conversion receiver downconverts the 1575.42MHz GPS signal to a 37.38MHz first IF, and then a 3.78MHz second IF. An integrated 2- or 3-bit ADC (1-bit SIGN, 1- or 2-bit MAG selectable) samples the second IF and outputs the digitized signals to the baseband processor.

The integrated synthesizer offers the flexibility in frequency planning to allow a single board design to be employed for reference frequencies from 2MHz to 26MHz. The integrated reference oscillator allows either TCXO or crystal operation.

The receiver runs from a 2.7V to 3.0V supply, and draws only 30mA when active. It is offered in a 28-pin thin QFN package, and is specified for -40°C to +85°C at 3V.

Applications

* Consumer Electronics (Location-Based Games) * Digital Cameras/Camcorders * Emergency Response Systems * Emergency Road-Side Assistance * Geographical Information Systems (GIS) * In-Vehicle Navigation Systems (IVNS) * Location-Based Services/Internet (PDAs) * Precision Timing * Recreational Handhelds/Walkie-Talkies * Telematics (Vehicle and Asset Tracking, Inventory Management)

* Supports All Popular Handset Reference Frequencies Up to 26MHz

* 4.7dB Cascaded Noise Figure

* 80dB Cascaded Gain

* Tolerates -90dBm In-Band Jammer

* Tolerates +13dBm CDMA Out-of-Band Jammer at Device Input

* Integrated Synthesizer and VCO

* Integrated 2- or 3-Bit ADC

* 50dB IF AGC Range

* Small 28-Pin Thin QFN Package

* SPI™ Control Interface

* Clock Output for Baseband Processor