On April 17, 2025, Da Da Da Lian Holdings, an international leading semiconductor component distributor dedicated to the Asia Pacific market, announced that its subsidiary Youshang has launched a high-precision positioning system application solution based on STMicroelectronics' (ST) STA8135 GNSS chip and Tianhe Intelligent Control TH1100 module.

In recent years, with the booming development of various fields such as drones, surveying and mapping, autonomous driving of agricultural machinery, driving tests and training, and intelligent lawn mowers, the demand for GNSS (Global Navigation Satellite System) in the market has been continuously increasing. In this context, Da Da Da Da You Shang has launched a high-precision positioning system application solution based on the ST STA8135 chip and the Tianhe Intelligent Control TH1100 module, aiming to meet the growing demand for high-precision positioning and help various industries achieve intelligent upgrades.

STA8135 is ST's new generation of three frequency high-precision positioning chip, which supports multi constellation and multi frequency signal reception and has centimeter level positioning capability. Combined with Tianhe Intelligent Control's RTK (Real Time Kinematic) algorithm, it can better meet the high-precision positioning needs of various application markets.

Tianhe Intelligent Control focuses on the research and production of key components for intelligent connected vehicles, and has accumulated rich technical and engineering experience in the field of high-precision navigation and positioning. The company has launched a series of high-precision positioning products through independently developed system architecture, core algorithms, and hardware design, including high-precision positioning modules, integrated navigation modules, positioning terminals (VPNS), high-performance inertial components (MEMS-IMU), and vehicle mounted navigation antennas. The TH1100 module used in this scheme is based on the STA8135 chip and supports the simultaneous reception of tri frequency signals (L1+L2+L5) from multiple constellations including GPS, GLONASS, Galileo, BDS, and QZSS. It achieves centimeter level positioning accuracy through an external RTK algorithm. In addition, the TH1110 module is equipped with an inertial measurement unit (IMU), which has the ability to calculate trajectories. Even in weak satellite signals or signal free environments, it can continuously provide accurate positioning information by integrating IMU data, GNSS measurements, vehicle speed information, and dynamic models.

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Figure 3- Block diagram of the high-precision positioning system application solution based on ST and Tianhe Intelligent Control products by Da Da Da You Shang

The technological advantages of Tianhe Intelligent Control make up for the shortcomings of the ST STA8135 GNSS chip in RTK algorithm, enabling this solution to be widely applied in fields such as drones, agricultural machinery, and intelligent devices, providing high-precision positioning support and maintaining excellent positioning performance in complex environments, thereby significantly improving operational efficiency.

Core technological advantages:

You can switch frequency bands by configuring firmware: L1+L2/L1+L5/L1+L2+L5；

Support two intelligent driving application scenarios: "heavy perception/light map" and "high-precision map RTK";

Support RTK and PPP-RTK;

Tianhe can provide external dual frequency RTK, tri frequency RTK algorithms, and inertial navigation algorithms;

Support PVT/Raw Data output;

Tianhe provides customized GNSS antenna and module adaptation solutions;

Support E6 frequency band and HAS services;

Support national standards.

Scheme specifications:

Dimensions: 17.0mm × 22.0mm × 3.1mm;

Working temperature:- 40℃~105℃；

Storage temperature:- 40℃~105℃；

Packaging: 54 pin LGA;

Receiving frequency band:

GPS（L1 C/A、L2C、L5）；

GLONASS（L1OF、L2OF）；

BeiDou（B1C、B1I、B2a、B2I）；

GALILEO（E1、E5a、E5b、E6）；

QZSS（L1 C/A、L2C、L5）；

NAVIC - former IRNSS（L5）。

Function: Tri frequency GNSS navigation and positioning module;

Default constellation: GPS＋Galileo＋BDS＋GLONASS；

Horizontal positioning accuracy:< 1.2m；

RTK algorithm SDK (external): can be supported in conjunction with external SOC;

Speed accuracy: Without assistance<0.1m/s;

1PPS accuracy: 20ns;

TTFF (AGNSS off):

Cold start: 35s;

Warm start: 30s;

Hot start: 1.5 seconds.

Sensitivity:

Capture:- 147dBm；

Tracking:- 160dBm；

Re capture:- 153dBm.

Interface: UARTx1， Default 460800bps;

Time pulse signal frequency: 1Hz;

agreement: NMEA0183，RTCM；

Antenna type: active antenna;

Voltage range: 1.7V~3.6V, typical value 3.3V;

Backup voltage: 1.7V~3.6V, typical value 3.3V;

power waste: 260mA@3.3V ；

Quality and reliability: Produced according to IATF 16949:2016 standard.

Regarding Dahua University Holdings:

Da Da Da Da Da Holdings is an internationally leading semiconductor component distributor dedicated to the Asia Pacific market. It was founded in 2005 and celebrates its 20th anniversary this year. Headquartered in Taipei, it has subsidiaries such as Shiping, Pinjia, Quanding, and Youshang, with approximately 5000 employees and over 250 authorized product suppliers. It has 69 service centers worldwide and achieved a revenue of NT $8805.5 billion in 2024. Dahua University has established an industrial holding platform, focusing on international operational scale and localized flexibility, and has long been deeply rooted in the Asia Pacific market. With the vision of "industry first choice - channel benchmark", it fully implements the core values of "team, integrity, professionalism, and efficiency", and has won the "Global Distributor Excellence Performance Award" for 24 consecutive years. At the same time, it continues to strengthen ESG sustainable development and has won international recognition for 3 consecutive years, with an MSCI ESG rating of A-level. Faced with the trend of new manufacturing, Dalian University is committed to transforming into a data-driven enterprise, establishing an online digital platform - "DaDaWang", and advocating the intelligent logistics service (LaaS, Logistics as a Service) model to assist customers in facing the challenges of intelligent manufacturing together. Starting from benevolence, building trust through technology, and adhering to the corporate purpose of "co creating partner value and achieving the future", Da Da Da Da Da hopes to build a highly competitive ecosystem with the industry "La Bang Jie Pai".