GNSS Modules | GNSS Compact Module Quectel LG77L - SATRON electronics

GNSS Compact Module Quectel LG77L

GNSS Compact Module Quectel LG77L
  • GNSS module
  • 7.0 mm × 7.0 mm × 2.0 mm
  • 0.2g
  • GPS, GLONASS (or BeiDou), Galileo (in the LG77L (C) version) and QZSS
  • Operating temperature range of -40 °C to +85 °C

The LG77L is a series of GNSS modules which supports concurrent reception of GPS, GLONASS (or BeiDou), Galileo, and QZSS. It can acquire and track any mix of GPS, GLONASS (or BeiDou), Galileo and SBAS signals. Compared with single GPS systems, enabling multiple GNSS systems increases the number of visible satellites, reducing the time-to-first-fix and improving the positioning accuracy, especially when driving through dense urban canyons.

By combining EASY™ (Embedded Assist System), an advanced AGNSS feature, with GLP (GNSS Low Power), a low-power mode, the LG77L achieves high performance, low power consumption and fully meets industrial standards. The EASY™ technology allows the module to calculate and predict orbits automatically by using the ephemeris data (of up to 3 days duration) which are stored in the internal RAM. As a result, the LG77L can acquires a fix position quickly, even at lower signal levels with low power consumption. With the GLP technology, on the other hand, the LG77L can adaptively adjust the on/off time based on the environmental and motion conditions to achieve a balance between the positioning accuracy and power consumption.

Its enhanced performance makes the LG77L ideal for industrial PDAs, consumer and industry applications. Extremely low-power consumption makes it a great solution for power-sensitive applications, such as portables.

Key Features

  • Supports anti-jamming technology and a multi-tone active interference canceller
  • Multiple low-power modes ensure ultra-low power
    consumption
  • Supports UART and I2C interfaces
  • Maximum update rate: up to 10Hz
  • Supports SDK commands developed by Quectel
  • Supports AGNSS

General Characteristics

  1. Supported Bands
  2. GPS L1 C/A: 1575.42 MHz
  3. GLONASS L1: 1602.5625 MHz
  4. BeiDou B1l: 1561.098 MHz
  5. Galileo E1: 1575.42MHz *only LG77L(C)
  6. Horizontal Position Accuracy
  7. Autonomous< 2.5 m CEP
  8. Velocity Accuracy
  9. Without Aid< 0.1 m/s
  10. Acceleration Accuracy
  11. Without Aid< 0.1 m/s²
  12. Timing Accuracy
  13. 1PPS < 50 ns
  14. TTFF @ -130 dBm with EASY
  15. Cold Start< 14 s Warm Start< 4 s Hot Start< 2 s
  16. TTFF @ -130 dBm without EASY
  17. Cold Start< 26 s Warm Start< 24 s Hot Start< 2 s
  18. Sensitivity
  19. Acquisition-147dBm Tracking-158dBm Reacquisition-156dBm
  20. Environmental
  21. Operating Temperature-40℃ to 85℃ Storage Temperature-40℃ to 90℃
  22. Dynamic Performance
  23. Maximum AltitudeMax.10000m Maximum VelocityMax.515m/s Maximum Acceleration4 G
  24. Dimensions7.0×7.0×2.0 mm
  25. WeightApprox. 0.2 g

Interfaces

  1. Serial InterfacesUART: Adjustable 9600–921600 bps
  2. Default: 9600bps
  3. I2C Interface
  4. Up to 400 kbps
  5. Update rate1Hz (default), up to10Hz
  6. ProtocolsNMEA 0183, PMTK, PQ

Power Management

  1. Power Supply2.8V ~ 4.3V
  2. Current Consumption (@ 3.3 V)
  3. Normal Operation:
    25 mA @ Acquisition (GPS + GLONASS)
    24 mA @ Tracking (GPS + GLONASS)
    Power Saving Modes:
    1.0 mA @ Standby Mode
    6 μA @ Backup Mode
  4. Antenna TypeActive or Passive
  5. Antenna PowerExternal 
  6. Active Antenna Protection
  7. Short-Circuit Protection and Open-
    Circuit Detection

Certification

  1. CE 
  2. RoHS Compliant
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