GALILEO GNSS module K922

GPSGLONASSQZSS

Introduction
Powered by the QC7820 SoC, the K922 GNSS module delivers centimeter-level precision and dual-antenna heading with an onboard IMU for reliable navigation. It supports all major constellations, provides strong interference resistance, and offers industrial CAN and Ethernet interfaces. Typical applications include precision agriculture, driver training systems, UAVs, CORS and digital construction.

Key Features

• Support GPS, BDS-2, BDS-3, GLONASS, GALILEO, NAVIC, QZSS and SBAS
• RF & BB integrated high-precision GNSS SoC
• Dual-core CPU architecture
• Dual-antenna heading support
• Support PPP-B2b and PPP-HAS services
• GNSS+INS navigation fusion with onboard IMU
• CAN and Ethernet interfaces for industrial integration

Performance

• Signal tracking: GPS: L1C/A, L2P, L2C, L5, L1C*; BDS-2: B1I, B2I, B3I; BDS-3: B1I, B3I, B1C*, B2a, B2b*; GLONASS: G1, G2, G3*; Galileo: E1, E5b, E5a, E5 AltBoC*, E6c*; QZSS: L1C/A, L2C, L5, L1C*; SBAS*: L1C/A, L5; NAVIC*: L5
• Cold start: < 20 s (with acceleration capture module)
• Hot start (with RTC): < 10 s (typical)
• Signal reacquisition: < 1 s
• RTK initialization time: < 5 s (baseline < 10 km)
• Initialization reliability: > 99.9%
• Velocity accuracy: ≤ 0.02 m/s
• Time accuracy: 20 ns
• PPP convergence time: < 15 min
• Post processing: 2.5 mm + 1 ppm Horizontal; 5 mm + 1 ppm Vertical
• Single baseline RTK: 8 mm + 1 ppm Horizontal; 15 mm + 1 ppm Vertical
• DGPS: < 0.4 m RMS
• SBAS: 1 m 3D RMS
• Standalone: 1.5 m Horizontal; 3 m Vertical
• PPP: 0.1 m Horizontal; 0.2 m Vertical
• ADR position error: < 3% of distance travelled without GNSS
• Heading accuracy: 0.15° / 1 m baseline length

Note: Items marked with * are only supported by specific firmware.

Physical

• Size (W × L × H): 16 mm × 21 mm × 2.5 mm
• Weight: 1.8 g
• Hardware interface: LGA 48 pin
• Power consumption: 0.5 W
• Input voltage: +3.3 V ± 5% DC
• Operating temperature: -40 °C to +85 °C
• Storage temperature: -55 °C to +125 °C
• LNA power (external): +3.3 V ~ +5 V ± 5% DC @ 0–100 mA
• LNA gain: 20 ~ 35 dB (suggested)
• Impedance match: 50 Ω

Communications

• UART: 2
• UART3 or CAN (optional): 1
• PPS: 1
• EVENT: 1
• I2C: 1
• SPI: 1
• ETH: 1 (corresponding pins: 12, 13, 25, 26)
• Correction data I/O: RTCM 2.X, 3.X
• Position data output: ASCII (NMEA-0183): GGA, GSA, GSV, RMC, HDT, VHD, ZDA, VTG, GST, GLL; Binary: ComNav Binary; Position output rate: 1, 2, 5, 10, 20* Hz, 50* Hz; IMU data rate: 1, 2, 5, 10, 20* Hz, 50* Hz, 100* Hz

Note: Items marked with * are only supported by specific firmware.

Inertial Sensor

• Gyroscope: Range ±125°/s; Bias repeatability 0.5°/s; Bias stability 5°/h; Angular random walk 0.12°/√h
• Accelerometer: Range ±2 g; Bias repeatability 20 mg; Bias stability 50 μg; Velocity random walk 0.07 m/s/√h

Technical specifications

• Model: K922
• SoC: QC7820
• Supported constellations: GPS, BDS-2, BDS-3, GLONASS, GALILEO, NAVIC, QZSS, SBAS
• Positioning accuracy: RTK and PPP levels (see Performance)
• Dual-antenna heading support and onboard IMU for GNSS/INS fusion
• Interfaces: UART, optional CAN, PPS, EVENT, I2C, SPI, Ethernet
• Size / Weight: 16 × 21 × 2.5 mm / 1.8 g
• Power: 0.5 W; Input +3.3 V ± 5%
• Operating temperature: -40 °C to +85 °C
• Storage temperature: -55 °C to +125 °C