Overview

The SinoGNSS K803 is a surface-mount RTK GNSS module for integration into customer-designed electronics. TOXU supplies it under model TX-K803 for OEM positioning projects.

Built on the Quantum III platform, K803 processes multi-frequency satellite observations for RTK positioning. Its signal coverage includes GPS L1/L2/L5, BeiDou B1/B2/B3, GLONASS G1/G2 and Galileo E1/E5.

The module package lets equipment designers choose their own power circuit, host connectors, antenna connection and mechanical layout. Applications include robotic navigation, surveying instruments and machine guidance hardware.

The K803 family also includes inertial-navigation configurations. For these configurations, integration includes sensor-axis alignment and initialization as well as the GNSS antenna and correction-data connection.

Key Features

Multi-Frequency RTK Processing

K803 uses satellite observations from multiple frequency bands to compute an RTK solution. Select an antenna that covers the signals enabled for the project.

Host Communication Options

Four UART interfaces give PCB designers flexibility when assigning connections for navigation output, configuration and correction data.

Timing and Event Capture

PPS provides a timing reference for compatible electronics. Event inputs allow the receiver to timestamp external triggers from measurement or acquisition hardware.

Direct PCB Integration

The LGA package supports a production design with project-specific power, RF and connector circuits. Follow the manufacturer's footprint and assembly instructions when developing the PCB.

Inertial Configuration Options

Projects using the GNSS/INS configuration can evaluate fused navigation data under their expected motion and reception conditions. Specify the required inertial functionality when selecting the module configuration.

Technical Specifications

RTK accuracy is a manufacturer specification under defined operating conditions. Installed performance depends on antenna characteristics, satellite visibility, multipath, correction quality and reference-station distance.

Dimensions and Hardware Structure

The module measures 30 × 30 × 3.2 mm and uses an 82-pin LGA package. Develop the carrier PCB from the manufacturer's mechanical drawing, land pattern and pin definition. For an inertial configuration, account for the marked sensor axes when setting the module orientation.

Applications

Robotic Navigation Hardware

Integrate the receiver into a custom controller PCB for outdoor positioning and navigation development.

Surveying and Mapping Instruments

Combine position output and event timing with instrument measurements or mapping records.

Agricultural Guidance Electronics

Develop a positioning subsystem with a matched antenna, host controller and correction-data link.

Custom UAV Navigation PCBs

Place GNSS reception and host communication on a project-specific navigation or payload board.

System Integration

Multi-band GNSS antenna → Carrier PCB RF circuit → K803 module → Host processor

Design the carrier PCB around the module's power, grounding and RF requirements. Route the antenna input with controlled impedance and provide the antenna supply circuit required by the selected active antenna.

Configure a compatible UART connection for the host and deliver correction data through the selected receiver interface. Verify message output, correction reception and solution status on the assembled hardware.

Complete RF / GNSS Hardware Solution Support

TOXU can help select GNSS antennas, RF cable assemblies and connectors for the carrier-board design. For early evaluation, the TX-K803-EK0407 adapter-board configuration is available as a related product.

Why Choose TOXU

Discuss the module configuration, antenna and interconnects together when planning an OEM design. TOXU can also review project requirements for customized PCBA and prototype assembly.

About TOXU

TOXU Tech supplies GNSS positioning hardware, GNSS and communication antennas, RF connectors and cable assemblies to equipment manufacturers and system integrators.

TOXU also provides PCBA manufacturing and OEM / ODM hardware integration services for RF and GNSS projects.

FAQ

Who manufactures the K803 module?

K803 is a SinoGNSS module from ComNav Technology. TOXU supplies the module under product model TX-K803.

What is the difference between TX-K803 and TX-K803-EK0407?

TX-K803 is the surface-mount module for a customer-designed PCB. TX-K803-EK0407 combines a K803 module with an adapter PCB for board-level integration.

What is required for RTK positioning?

Use a compatible correction stream, a suitable multi-band antenna and an installation with sufficient satellite reception to obtain a fixed RTK solution.

Is inertial navigation available?

The K803 family offers inertial-navigation configurations. Specify the required IMU and fusion functions when selecting the order configuration.

How does the module connect to the host?

The module provides UART interfaces for compatible host communication. PPS and event signals can be connected where timing synchronization is required.

What information is needed for an OEM quotation?

Provide the quantity, required signal coverage, firmware functions, inertial configuration and any antenna or PCBA assembly requirements.