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SparkPNT GNSS Flex Module – LG290P: Multi-Band, Multi-Constellation RTK GNSS Receiver
The SparkPNT GNSS Flex Module – LG290P is a modular plug-in GNSS receiver board built around the Quectel LG290P, offering high-precision, multi-frequency, and multi-constellation support for advanced navigation and timing applications. Designed to fit into the SparkPNT GNSS Flex ecosystem, it uses dual 2×10-pin headers to connect seamlessly with carrier boards, breaking out three UARTs, I2C, PPS, and event signals on a standardized pinout. Its modular design allows for simple upgrades or repairs without redesigning entire systems.
The Quectel LG290P receiver provides concurrent signal reception across L1, L2, L5, and L6/E6 frequency bands, supporting GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC. It also works with SBAS systems (WAAS, EGNOS, BDSBAS, MSAS, GAGAN, SDCM) and advanced PPP services (BDS PPP-B2b, QZSS CLAS, Galileo HAS, MADOCA-PPP) for centimetre-level accuracy. With RTK support, the LG290P achieves 0.8cm horizontal and 1.5cm vertical accuracy, and offers a fast 5s RTK convergence time. Equipped with a built-in NIC anti-jamming unit, the LG290P provides superior resilience against narrow-band interference and ensures reliable reception in urban and electromagnetically noisy environments. With support for update rates up to 20 Hz, 1PPS accuracy of 5ns RMS, and ultra-low-power operation with a backup mode as low as 12 µA, this module is ideal for autonomous vehicles, surveying, robotics, precision agriculture, and geospatial applications.
Features:
High-Precision GNSS Module: Based on Quectel LG290P with multi-band, multi-constellation support.
Constellations Supported: GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC with SBAS (WAAS, EGNOS, BDSBAS, MSAS, GAGAN, SDCM).
PPP Services: Supports BDS PPP-B2b, QZSS CLAS, Galileo HAS, MADOCA-PPP.
Frequency Bands: L1, L2, L5, L6/E6.
High Accuracy:
Autonomous: 0.7m horizontal, 2.5m vertical.
RTK: 0.8cm 1ppm horizontal, 1.5cm 1ppm vertical.
1PPS signal accuracy: 5ns RMS.
Fast Convergence: RTK convergence time of 5s.
Performance: 1040 tracking channels, velocity accuracy 0.03m/s, update rates up to 20 Hz.
Built-In NIC Anti-Jamming: Detects and eliminates narrow-band interference sources.
Power Efficiency: Operates on 3.15–3.45V, with 91mA typical consumption, backup mode as low as 12µA.
Interfaces:
UART ×3 (default 460800 bps, up to 3 Mbps, NMEA/RTCM).
I2C (standardized pinout).
SPI optional.
PPS ×1 and event marker ×1.
External Antenna Support: U.FL connector for active multi-band GNSS antenna.
Environmental Specs: Operating temperature –40 C to +85 C, max altitude 10,000m, velocity 490m/s, acceleration 4g.
Form Factor: Compact 12.2mmX16mmX2.6mm, weight ~0.9g.
