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UM680A

UM680A

Automotive-grade Multi-GNSS Dual-frequency High-precision RTK Positioning Module

UM680A is a high-precision GNSS dual-frequency navigation module developed by Unicore for the intelligent driving market. Based on the proprietary multi-system dual-frequency high-performance SoC-UC6580A, the module supports multi-system dual-frequency joint positioning or single-system standalone positioning with centimeter-level accuracy.


Ordering Information

Supply at multiples of 250 pieces


vechicle gps

Product Characteristics

  • Supports concurrent operation of GPS, BDS, GLONASS and Galileo

  • Supports A-GNSS to reduce the TTFF

  • GNSS chip qualified according to AEC-Q100 and production process conforms to IATF16949

  • Anti-jamming design to ensure the module working stably in complex electromagnetic environment

  • Centimeter-level positioning accuracy & raw data output

Technical Specifications

Performance Specifications


Channel96 channels, based on UFirebird II
FrequencyGPS L1C/A, L5
BDS B1I, B1C*, B2a
GLONASS G1*
Galileo E1, E5a
NavIC L5*
QZSS L1, L5
SBAS L1C/A
ModesSingle-system standalone positioning
Multi-system joint positioning
Time to First Fix (TTFF)Cold Start: ≤ 26 s
Hot Start: ≤ 2 s
Re-acquisition : ≤ 2 s
Single Point Positioning (RMS)Horizontal: 1.5 m (open sky)
Vertical: 2.5 m (open sky)
RTK (RMS)Horizontal: 1 cm + 1 ppm (open sky)
Vertical: 1 cm + 1 ppm (open sky)
Velocity Accuracy(RMS)20.05 m/s
1PPS20 ns
Sensitivity (GNSS)BDS+GPS+GLONASS+Galile
Tracking: -162 dBm
Cold Start: -147 dBm
Hot Start：-157 dBm
Reacquisition: -158 dBm
Data Update Rate1 Hz / 5 Hz / 10 Hz
Correction
RTCM V3.X
Data FormatNMEA 0183, Unicore



Physical Specifications

Dimensions22.0 x 17.0 x 2.6 mm
Package54 pin, LGA
Operating Temperature-40°C ~ +85 °C / 105 °C
Storage Temperature-40°C ~ +85 °C /105 °C


Electrical Specifications

Voltage2.7 V ~ 3.6 V DC
LNA Feed Power2.7 V ~ 3.3 V, <100 mA
Power Consumption1240 mW


Interfaces

2 × UART(LVTTL)
1 × I2C*
1 × SPI*
1 × 1PPS(LVTTL)


Functional Characteristics

Passive Antenna, Active Antenna, AGNSS *

NOTE: * Supported by specific firmware

             1 Open sky, continuous tracking
             2 68% at 30 m/s for dynamic operation,open sky

Download

UM680A_Product_Brief_En
11/03/2025
VIEW
UM680A_User Manual_V1.0_EN_R2.0
24/06/2025
VIEW
UM680A_Hardware Reference Design_V1.0_EN_R1.0
03/12/2024
VIEW
UFirebirdII Series Protocol Specification_EN_R1.4
22/08/2025
VIEW
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