The **MV26T2CG-R** is a high-performance **GNSS (Global Navigation Satellite System) Positioning Module** developed by Quectel. It is specifically designed for automotive applications, featuring multi-constellation support and Dead Reckoning technology. --- ### 1. Key Technical Specifications Below are the core electronic characteristics of the MV26T2CG-R: | Feature | Specification | | :--- | :--- | | **GNSS Support** | GPS, GLONASS, Galileo, BeiDou, QZSS | | **Receiver Type** | 47-channel GNSS engine | | **Voltage Supply** | 3.0V ~ 3.6V (Typical: 3.3V) | | **Power Consumption** | ~32mA @ Tracking; ~38mA @ Acquisition | | **Interface** | UART (Up to 115200 bps), I2C | | **Update Rate** | Up to 10Hz | | **Operating Temp** | -40°C to +85°C | --- ### 2. Core Electronic Components & Functions #### A. The GNSS Chipset At the heart of the module is a high-sensitivity RF front-end and baseband processor. It is capable of tracking multiple constellations simultaneously, which improves positioning accuracy in "urban canyons" (areas with high-rise buildings). #### B. Inertial Measurement Unit (IMU) The "R" in the suffix often denotes **Dead Reckoning (DR)** capabilities. * **Integrated Sensors:** It contains a 3-axis gyroscope and a 3-axis accelerometer. * **Function:** When the satellite signal is lost (e.g., in a tunnel or underground parking), the module uses the IMU data to calculate the vehicle's position based on its last known coordinates, speed, and trajectory. #### C. LNA and SAW Filter * **LNA (Low Noise Amplifier):** Boosts weak signals received from the antenna. * **SAW Filter:** Acts as a band-pass filter to reject out-of-band interference (like cellular or Wi-Fi signals), ensuring signal integrity. #### D. RTC and Backup Battery Pin The module includes a **Real-Time Clock (RTC)** and a `V_BCKP` pin. Supplying power to this pin allows the module to retain satellite ephemeris data, enabling a **Hot Start** (position fix in < 1 second). --- ### 3. Application Circuit Considerations To integrate this module into a PCB, the following electronic considerations are vital: ```c // Typical Connection Logic 1. VCC: Main 3.3V supply (ensure low ripple < 50mV). 2. GND: Connect to a solid ground plane for thermal/RF stability. 3. RESET_N: Driven by an open-drain GPIO to reset the module. 4. RF_IN: 50-ohm impedance-controlled trace to the antenna. 5. UART: RX/TX lines for NMEA sentence output and configuration. ``` --- ### 4. Certifications This module is typically **AEC-Q100** qualified, meaning its electronic components are stress-tested for the rigorous environment of the automotive industry (vibrations, extreme temperatures, and electromagnetic interference).