TAU1308 GNSS RTK module

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TAU1308 Single-Band RTK

The TAU1308 is a high-performance, ultra-compact GNSS positioning module built upon the state-of-the-art CYNOSURE III SoC architecture. It provides an advanced multi-constellation navigation solution by simultaneously tracking GPS, BeiDou, GLONASS, Galileo, and QZSS constellations. Embedded with a sophisticated single-band RTK (Real-Time Kinematic) engine, the TAU1308 achieves centimeter-level positioning accuracy under optimal field conditions, making it an ideal core hardware choice for demanding industrial machinery, smart agriculture, autonomous robotics, and precision consumer tracking devices.

Key Features

Full Constellation Navigation: Concurrent tracking of GPS, BDS, GLONASS, Galileo, and QZSS.
Centimeter-Level Accuracy: Highly integrated internal RTK position engine handles precision carrier phase calculations.
Hardware Protection Circuit: Onboard active antenna short-circuit hardware protection safeguards system integrity.
Flexible Interfacing: Highly configurable peripheral I/O pins for customized industrial integration.
Ultra-Low Power Footprint: Advanced power management design minimizes current draw for battery-critical hardware.
Wide Input Range: Supports single-supply operation across a broad input voltage threshold.

Technical Specifications

GNSS Tracking Channels 40 Channels

Constellation Support GPS / QZSS: L1C/A
BDS: B1I
GLONASS: G1
Galileo: E1

Max Position Update Rate Up to 5 Hz

Positioning Accuracy [1] Autonomous (GNSS): 1m CEP
D-GNSS Grid: < 1m CEP
RTK Centimeter Fix:
Horizontal (H): 1.0 cm + 1 PPM
Vertical (V): 3.5 cm + 1 PPM

Velocity & Time Accuracy Velocity (GNSS): 0.1 m/s CEP
Velocity (D-GNSS): 0.05 m/s CEP
1PPS Timing Pulse: 20 ns

Time to First Fix (TTFF) Hot Start Initial: 1 sec
Cold Start Initial: 28 secs
RTK Convergence Time: < 60 secs

Receiver Sensitivity Cold Start: -147 dBm
Hot Start: -153 dBm
Reacquisition: -156 dBm
Tracking & Navigation: -160 dBm

Operating Voltages Main Vcc Input: 2.0V 〜 3.6V
Digital I/O Threshold: 1.8V 〜 3.6V
Backup Supply Input: 1.8V 〜 3.6V

Power Current Metrics Active (GNSS, L1): 32 mA @ 3.3V
Standby Mode Draw: 13 µA

Hardware Interfaces [2] 1 x UART / 1 x USB
1 x SPI (Master/Slave)
1 x I2C

Telemetry Protocols RTCM 3.0 / 3.2 / 2.3 / 2.4x [3]
NMEA 0183 Protocol Ver. 4.00 / 4.10
Cynosure Receiver Protocol

Dynamic Limits & Size Max Velocity / Altitude: 515 m/s / 18,000 m
Operating Temp Scope: -40°C 〜 +85°C
Physical Sizing: 12.2 × 16.0 × 2.4 mm

Compliance & Certifications RoHS, REACH, FCC, CE-RED

* [1] Demonstrated in open sky conditions, single band, with an optimal external LNA architecture.

* [2] Supported upon request via specialized custom engineering firmware modification loops.

* [3] RTCM 2.3/2.4 legacy standards are explicitly supported via customized firmware variants.

Technical Documentation

📄 Download TAU1308 Official Reference Datasheet (PDF) [T-5-2210-TAU1308 Datasheet-V1.6] ↗

Recommended Evaluation Hardware (EVK)

For expedited laboratory prototyping, electrical testing, and firmware evaluation, pairing this SMD module with the official Multi-Band RTK Evaluation Kit (EVK) is highly recommended.