K680 OEM Board
The K680 board is a compact industrial-grade high-precision board with complete
intellectual property rights. Support GPS/BDS/GLONASS satellite navigation system,
support RTK positioning, support multiple data interfaces. The board structureis compact,
hardware size and interface are compatible with imported boards,
and support customized development. It can be widely used in drones,
high precision mapping, machine control, system integration,
displacement deformation monitoring,surveying and mapping GIS,
precision agriculture, exploration, transportation and so on.

Features
■ Support BDS B1/B2/B3、GPS L1/L2/L5、GLONASS L1/L2
■ Support DGNSS positioning
■ Centimeter high precision RTK positioning
■ Flexible external interface, support serial port, Ethernet, CAN/422
■ Built-in web interface for board upgrade, configuration, control and status queries.
■ Support remote upgrade
■ Support custom ASCII and binary format output
■ Compact and easy to integrate

Specifications
Satellite Signals
–GPS L1 / L2 / L5
–BDS B1 / B2 / B3
–GLONASS L1 / L2
Single frequency positioning (RMS)
Horizontal: 1.5m
Vertical: 3.0m
Dual frequency positioning (RMS)
Horizontal: 1.2m
Vertical: 2.5m
DGNSS(RMS)
Horizontal: 0.4m
Vertical: 0.8m
RTK (RMS)
Horizontal: 10mm+1ppm
Vertical: 15mm +1ppm
Velocity accuracy (RMS): 0.03m/s
Time accuracy (RMS): 20ns
Measurement accuracy (RMS)
B1/L1 C/A code
-BDS 10cm
-GPS 10cm
-GLONASS 10cm
B1/L1 Carrier phase
-BDS 1mm
-GPS 1mm
-GLONASS 1mmB2/L2P(Y) code
-BDS 10cm
-GPS 10cm
-GLONASS 10cmB2/L2 Carrier phase
-BDS 1mm
-GPS 1mm
-GLONASS 1mmB3/L5 code
-BDS 10cm
-GPS 10cmB3/L5 Carrier phase
-BDS 1mm
-GPS 1mm
Physical
Size: 71 x 46 x 13 mm
weight: 40g
Antenna interface: MMCX
I/O interface: 2x14 Pin
Working temperature: -40℃ ~85℃
Storage temperature: -55℃ ~95℃
humidity: 95% no condensation
impact: GJB150.18-2009, MIL-STD-810
shake: GJB150.16-2009, MIL-STD-810
Electrical
Input voltage: 3.3VDC+ 5%/-3%
Power consumption: 2.7W (typically )
RTC: 1.8~3.3VDC
Antenna interface feed: 4.75~5.10V, 100mA Short circuitprotection
Antenna matching impedance: 50Ω
Initialization time Less than 10 seconds (typically)
First positioning time
- Cold start: 40s (typically )
- warm start: 30s (typically)
- Hot start：5s (typically )
Differential data: RTCM2.x/3.x CMR CMR+
Data format: NMEA-0183 custom ASCII and binary format
Data update: 1Hz / 5Hz / 10Hz / 20Hz（option）