GNSS module U702

Introduction
The U702 datalink module is an SMD RX/TX radio module using LoRa (CSS) modulation. Its compact 17×22×3 mm form factor and low supply voltage make it suitable for integration with GNSS and other embedded systems requiring long-range, low-power data links.

Features

• LoRa protocol (CSS modulation)
• Selectable frequency bands: 410–470 MHz / 863–870 MHz / 902–928 MHz
• Surface-mounted (SMD) design, small footprint
• Frequency hopping support
• Working range approximately 0.8–1.5 km (environment dependent)
• Low supply voltage: +3.3–3.6 V DC

Highlights

• Long-range, low-power radio link with high reception sensitivity for reliable communication in noisy environments
• Compact SMD package (17×22×3 mm, 5 g) for easy integration into GNSS-based products and other embedded devices
• Multiple transmit power options (0.025 W / 0.1 W / 0.5 W) and frequency hopping to improve link robustness

Product parameters (summarised)

• Frequency range: 410–470 MHz / 863–870 MHz / 902–928 MHz
• Work mode: Half-duplex
• Frequency stability: ±1.5 ppm
• Modulation: CSS (LoRa)
• Air baud rates: 500 / 11000 / 12500 / 15500 / 18000 bps
• Protocol: LoRa
• Size (with connector): 17 × 22 × 3 mm
• Weight: 5 g
• Power supply: +3.3 V to +3.6 V DC
• Emission current: < 0.2 A
• Receive current: 50 mA
• Transmit power options: 0.025 W, 0.1 W, 0.5 W
• I/O interface: LGA 2×16 pin, pitch 1.27 mm
• DTE/DCE interface: 2× LVCMOS 3.3 V
• Antenna interface: IPEX female connector
• Working range: ~0.8–1.5 km (depending on environment and configuration)

Technical specifications

• Frequency stability: 1.5 ppm
• Modulation system: CSS (LoRa)
• Air interface baud rates: 500, 11000, 12500, 15500, 18000 bps
• Power supply: +3.3–3.6 V DC
• Emission current: < 0.2 A
• Receive current: 50 mA
• Transmit power options: 0.025 W / 0.1 W / 0.5 W
• Interfaces: LGA 2×16 pin (1.27 mm), 2× LVCMOS 3.3 V, IPEX female antenna
• Dimensions: 17 × 22 × 3 mm
• Weight: 5 g