GPS/GLONASS Module  
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   Ct-G551 (1.8V)    
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The Ct-G551 GPS module is a high sensitivity, low power, Surface Mount Device (SMD) that fully utilized SiRFstarV upgraded features. This 48-channel Global Positioning System (GPS) and Global Navigation Satellite System (GLONASS) receiver is designed for a wide range of OEM applications and is based on the GPS signal search capabilities of the
SiRFstarV CSRG05e ROM chipset, SiRF’ s newest chipset technology. The Ct-G551 provides flexible bus interfaces (UART).


The Ct-G551 is designed to allow quick and easy integration into GPS-related applications
such as:

  • Mobile gaming
  • Cellular handsets
  • Cameras
  • Asset tracking
  • Other location-aware consumer devices Premium on-chip software provides a new
    level of continuous location awareness by employing.
  • Opportunistic ephemeris decode and advanced power management, which enable
    the GPS receiver to stay in a hot-start condition nearly continuously while consuming
    very little power
  • Full support for client-based and server-based SiRFInstantFixTM
  • Dynamic contextual awareness, temperature monitoring, and MEMS sensors that work
    in concert to conserve power and boost performance
  • Use of software control modules to achieve power saving state
  Hardware and Software
  • Based on the high performance features of the SiRF Star V low power single chipset.
  • Adaptive Micropower Controller:
  • Only 50 to 500μA maintains hot start capability
  • <10mW required for TricklePower™ modeRoHS compliant (lead-free)
  • SMT pads allow for fully automatic assembly processes equipment and reflow soldering
  • Advanced Navigation Features:
  • Smart sensor I²C interface
  • Interrupt input for context change detection
  • Highest performance Solution :
  • GPS, GLONASS, Galileo and SBAS reception for high GNSS availability and accuracy
  • High sensitivity navigation engine (PVT) tracks as low as GPS:-164dBm、
  • 48 track verification channels
  • Active Jammer Remover:
  • Removes in-band jammers up to 80 dB-Hz
  • Tracks up to 8 CW jammers
  • Multimode A-GPS (Autonomous, MS-Based, and MS-Assisted) – Need operator support
  • Embedded CGEE / SGEE (With back-end server support) speed up TTFF a lot and
    makes cold start time to be around 20+ seconds.
  • SiRFGeoRecovTM Reverse EE makes positioning process being done under power
    saving mode.
  • Reacquisition Time: 0.1 second
  • RF Metal Shield for best performance in noisy environments
  • Built-in LNA.
  • Built-in internal ROM and based on Firmware 4.1.X
  • It can remove in-band jammer up to 80db-Hz and track up to 8CW jammers, so the
    module can prevent GPS signal interference when design-in the electrical device with
    noisy electrical signal interferences such as Laptop, mobile phone, DSC, etc.
  • Maintain tracking sensitivity as low as GPS:-164dBm、GLONASS:-161dBm, even
    without network assistance. (SiRF StarIII has only -159dBm sensitivity)
  • Support SiRFaware technology :
  • Support adaptive “Micro Power Controller” power management mode.
  • <10mW Trickle Power, so user can leave power on all day instead of power off
  • Suitable for battery drive devices that need lower power consumption application
  • Ideal for high volume mass production(Taping reel package)
  • Cost saving through elimination of RF and board to board digital connectors
  • Flexible and cost effective hardware design for different application needs
  • Embed CGEE (Client Generated Extended Ephemeris) that can capture ephemeris data
    from satellites locally and predicts ephemeris out to 3 days. So if the module was off
    within 3 days, it could complete positioning process with limited time just like hot start.
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