MAX2769C Universal GNSS Receiver

By Maxim Integrated 68

MAX2769C Universal GNSS Receiver

Maxim's MAX2769C is a next-generation universal GNSS (Global Navigation Satellite System) receiver that covers L1/E1, B1, G1 bands for GPS, Galileo, BeiDou, and GLONASS satellite systems on a single chip. This single-conversion GNSS receiver is designed to provide high performance for industrial and consumer applications. The MAX2769C is designed on Maxim’s advanced, low-power SiGe BiCMOS process technology. Incorporated on the chip is the complete receiver chain, including a dual-input LNA and mixer, followed by the image-rejection filter, programmable gain amplifier (PGA) and a multibit ADC. The total cascaded noise figure of this receiver is as low as 1.4 dB. In addition, the device includes an integrated VCO, a crystal oscillator, and a fractional-N frequency synthesizer to program the LO frequency using different reference frequencies. The MAX2769C has the option to select one of the two LNAs for separate active and passive antenna inputs. LNA1 can be used with passive antenna input and LNA2 can be used for active antenna input. Also, the MAX2769C completely eliminates the need for external IF filters by implementing on-chip monolithic filters and requires only a few external components to form a complete low-cost GPS RF receiver solution. The device has the flexibility to configure the IF filter for various center frequencies and bandwidths using the SPI interface.

Features and Benefits
  • GPS / GLONASS / Galileo / BeiDou systems
  • Dual-input selectable LNA for separate passive and active antenna inputs
  • 1.4 dB cascaded noise figure and 110 dB of cascaded gain with gain control range of 59 dB from PGA
  • Integrated active antenna sensor
  • Fractional-N synthesizer with integrated VCO
  • No external IF SAW or discrete filters required
  • Programmable IF frequency
  • Programmable 2.5 MHz, 4.2 MHz, and 9.66 MHz IF bandwidth and 9 MHz ZIF LPF BW
  • Eight preconfigured device states when no SPI available
  • 40 pF output clock drive capability
  • 28-pin thin QFN package (5 mm x 5 mm)
Applications
  • Navigation systems, marine / avionics navigation
  • Location-enabled mobile handsets
  • PNDs (personal navigation devices)
  • Telematics (asset tracking, inventory management)
  • Software GPS
  • Laptops and netbooks
  • In-vehicle navigation systems
  • Digital still cameras and camcorders

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