The **LRG-R5465** is a high-performance, ultra-compact GPS/GNSS receiver module. It is widely used in automotive navigation, personal tracking, and industrial telematics due to its low power consumption and high sensitivity. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Chipset** | MTK (MediaTek) High-Sensitivity Engine | | **Frequency** | L1, 1575.42 MHz | | **Channels** | 66 Search / 22 Tracking | | **Sensitivity** | -165 dBm (Tracking) / -148 dBm (Cold Start) | | **Supply Voltage** | 3.0V to 5.0V DC | | **Power Consumption** | ~40mA (Tracking) / ~45mA (Acquisition) | | **Interface** | UART (TTL Level) | | **Update Rate** | 1 Hz to 10 Hz | --- ### 2. Electronic Component Breakdown The LRG-R5465 is a System-in-Package (SiP) that integrates several critical electronic sub-components: #### A. The GNSS Engine (IC) The core logic is based on a MediaTek architecture. It handles the signal processing, calculates the **Position, Velocity, and Time (PVT)**, and converts satellite signals into NMEA data strings. #### B. Low Noise Amplifier (LNA) To maintain its -165 dBm sensitivity, the module includes an internal LNA. This component amplifies the weak signals from satellites while minimizing the introduction of electronic noise. #### C. SAW Filter (Surface Acoustic Wave) This component acts as a gatekeeper, filtering out out-of-band interference (such as signals from cellular or Wi-Fi networks) to ensure the GNSS receiver only processes the 1575.42 MHz frequency. #### D. TCXO (Temperature Compensated Crystal Oscillator) Because GPS timing requires extreme precision, a TCXO is used to provide a stable clock signal across a wide temperature range (-40°C to +85°C), ensuring fast "Time to First Fix" (TTFF). --- ### 3. Pinout and Integration The module typically features a multi-pin SMT (Surface Mount Technology) pad layout: * **VCC:** Power input (3.3V recommended). * **GND:** System ground. * **TX/RX:** UART communication lines for sending commands and receiving NMEA 0183 data. * **PPS:** (Pulse Per Second) output used for high-precision timing applications. * **RESET:** Used to manually restart the module logic. --- ### 4. Implementation Example (UART Data) The module outputs standard NMEA strings via the UART interface. A typical data packet looks like this: ```text $GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A ```