UM621A is a GNSS dual-frequency + MEMS integrated navigation module developed by Unicore Communications for the automotive market. Based on the proprietary multi-system dual-frequency high-performance SoC-UC6580A, and equipped with a 6-axis MEMS device, the module supports multi-system dual-frequency joint positioning or single- system standalone positioning, and can directly output GNSS+MEMS integrated positioning results, which ensures the continuity of positioning even in tunnels or underground parking lots.
Ordering Information
Supply at multiples of 500 pieces
Automotive grade dual-frequency GNSS+MEMS integrated navigation and positioning module
Supports GPS L1 C/A, L5; BDS B1I, B1C*, B2a; GLONASS G1; Galileo E1, E5a; NavIC L5*; QZSS and SBAS
Supports multi-system dual-frequency positioning, multi-system single-frequency positioning or single-system standalone positioning
Built-in MEMS to output integrated positioning results with a single module
Supports odometer pulse input
Supports the output of integrated positioning results and GNSS-only positioning results through one serial port
100% continuous navigation even in tunnels or underground parking lots
GNSS chip qualified according to AEC-Q100; production process conforms to IATF16949
Channel | 96 channels, based on UFirebirdII |
Frequency | GPS L1C/A, L5 |
BDS B1I, B1C*, B2a | |
GLONASS G1 | |
Galileo E1, E5a | |
NavIC L5* | |
QZSS L1, L5 | |
SBAS L1C/A | |
Positioning Mode | Single-System Standalone Positioning |
Multi-System Joint Positioning | |
Time to First Fix (TTFF)1 | Cold Start: < 26 s |
Hot Start: < 2 s | |
Re-acquisition: < 2 s | |
Positioning Accuracy (CEP)2 | Horizontal:1.5 m (Dual-frequency quad-system, open sky) |
Positioning Error of INS only | < 2 % of the distance traveled without GNSS signals |
Velocity Accuracy(RMS)3 | 0.05 m/s (GNSS) |
1PPS | 20ns |
Sensitivity | GNSS |
Tracking -162 dBm | |
Cold Start -148 dBm | |
Hot Start -158 dBm | |
Reacquisition -160 dBm | |
GNSS Data Update Rate | 1Hz / 5 Hz* / 10 Hz* |
INS Data Update Rate | 50 / 100 Hz |
Data Format | NMEA 0183, Unicore |
Dimensions | 16.0 x 12.2 x 2.4 mm |
Package | 24 pin SMD |
Temperature | Operating -40 °C ~ +85 °C |
Storage -40 °C ~ +85 °C |
Voltage | 2.7V ~ 3.6 V DC |
LNA | 2.7V ~ 3.3 V, <100 mA |
Power Consumption3 | 330 mW |
2 × UART (LVTTL) | |
1 × I2C* | |
1 × SPI* | |
1 × SPEED | |
1 × FWD | |
1 × 1PPS (LVTTL) |
Passive Antenna, Active Antenna |
AGNSS* |
Note: Items marked with * are only supported by specific firmware.
1 Open sky
2 68% at 30 m/s for dynamic operation,open sky
3 Open sky, continuous tracking