GALILEO GNSS module K901

GPSGLONASSQZSS

Introduction
The K901 is a compact GNSS module based on the QC7820 RF+BB integrated SoC. It delivers multi-constellation positioning, advanced anti-interference algorithms and low power consumption for integration in size- and power-constrained IoT, UAV and industrial applications.

Key Features

• Full-constellation support: GPS, BDS-2, BDS-3, GLONASS, GALILEO, NAVIC, QZSS, SBAS
• RF & BB integrated high-precision QC7820 SoC
• Dual-core CPU architecture
• Compact SMT/LGA package with low power draw (0.35 W)
• Supports PPP-B2b and PPP-HAS services

Highlights

• Centimeter-level positioning with RTK and PPP modes; fast initialization and high reliability for demanding workflows.
• Small form factor (12.2 × 16 × 2.5 mm) and LGA 24-pin interface simplify PCB integration in constrained designs.
• Multi anti-interference system: wideband reception, narrowband suppression and continuous-wave rejection combined with adaptive algorithms to improve observation quality in hostile RF environments.
• Flexible firmware options and full pin compatibility to ease migration from common industry GNSS modules.

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; 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 (D < 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

Physical

• Size (W × L × H): 12.2 mm × 16 mm × 2.5 mm
• Weight: 1.0 g
• Hardware interface: LGA 24 pin
• Power consumption: 0.35 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% @ 0–100 mA
• Suggested LNA gain: 20–35 dB
• Impedance match: 50 Ω

Communications & Data Output

• UART: 3
• PPS: 1
• EVENT: 1
• I2C: 1
• 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 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz*, 50 Hz* (rates marked * require specific firmware)

Technical specifications

• Model: K901
• SoC: QC7820 (RF & BB integrated high-precision GNSS SoC)
• Supported constellations: GPS, BDS-2, BDS-3, GLONASS, GALILEO, NAVIC, QZSS, SBAS
• RTK initialization & performance: RTK init < 5 s (D < 10 km); Single baseline RTK 8 mm + 1 ppm H, 15 mm + 1 ppm V
• PPP capabilities: PPP-B2b, PPP-HAS; PPP convergence < 15 min; PPP accuracy 0.1 m H / 0.2 m V
• Post-processing accuracy: 2.5 mm + 1 ppm H; 5 mm + 1 ppm V
• Cold/Hot start times: Cold < 20 s (with accel capture module); Hot < 10 s (typical)
• Time accuracy: 20 ns; Velocity accuracy ≤ 0.02 m/s
• Mechanical: 12.2 × 16 × 2.5 mm; 1.0 g; LGA 24 pin
• Electrical: Input +3.3 V ±5%; Power consumption 0.35 W; External LNA power +3.3 V ~ +5 V ±5% @ 0–100 mA
• Environmental: Operating -40 °C to +85 °C; Storage -55 °C to +125 °C
• RF: Suggested LNA gain 20–35 dB; Impedance 50 Ω
• Interfaces & outputs: UART x3, I2C x1, PPS x1, EVENT x1; RTCM 2.X/3.X for correction; NMEA and ComNav Binary outputs
• Notes: Items marked with * (e.g., some GLONASS/Galileo bands, 20/50 Hz rates) require specific firmware support