KDS TCXO Drives High-Performance Design of Satellite Positioning Module

Satellite positioning modules, as the core components for smart terminals to perceive spatiotemporal information, have been deeply integrated into fields such as vehicle navigation, intelligent logistics, precision agriculture, and industrial IoT. The optimization design of their hardware architecture directly determines the positioning accuracy and environmental adaptability. The current mainstream solution adopts a combination architecture of “RF chip + baseband processor + high-precision clock source”.

In the clock source selection, the TCXO has become a key link with its unique temperature compensation mechanism. Compared with ordinary crystal oscillators, it can control the frequency drift across the entire temperature range within the magnitude of ±5ppm to ±20ppm through built-in thermistors and compensation networks, meeting the stringent requirements of satellite signal decoding for a nanosecond-level clock reference. Especially in the wide temperature working scenario of -40℃ to 85℃, the TCXO can effectively suppress the interference of temperature gradients on the oscillation frequency, ensuring the stability of GNSS signal acquisition and tracking. This is crucial for scenarios such as vehicle terminals crossing complex climatic zones and drones carrying out cross-regional operations.

In the signal processing chain of satellite positioning modules, the TCXO undertakes the core function of the frequency reference. When satellite signals are transmitted to the receiving end, precise clocks are required to complete carrier stripping, pseudocode alignment, and phase measurement. Clock jitter will directly lead to the accumulation of pseudorange measurement errors. The low phase noise characteristic of the TCXO (typical value ≤ -150dBc/Hz@10kHz) can reduce the bit error rate in the baseband processing link. Especially in weak signal environments (such as urban canyons and indoor penetration scenarios), a stable clock reference can significantly improve the signal-to-noise ratio and extend the signal coherent integration time. In addition, modern TCXOs generally adopt SMD packaging (such as the specification of 3.2mm×2.5mm), which, combined with automated surface-mount technology, can meet the miniaturization design requirements of modules. The anti-vibration design (withstanding 50g impact) makes it suitable for dynamic working scenarios such as engineering machinery and smart wearables, ensuring the stability of the clock in motion.

The DSA211SDN series temperature-compensated crystal oscillators, as core products of Daizhenkong KDS, have built a unique performance advantage system for high precision positioning scenarios. The device adopts an all ceramic packaging process to achieve a frequency stability of ±2ppm across the full temperature range of -40°C to 85°C, exceeding the average level of similar products by more than 30%. The wide frequency range of 10MHz to 50MHz supports multi standard satellite signal processing. Combined with ultra low phase noise of -155dBc/Hz@10kHz, it can effectively reduce the clock deviation of multi system  compatible modules and achieve nanosecond-level time synchronization. In terms of electrical characteristics, the 3.3V/2.8V dual power supply compatible design adapts to different power consumption architectures, with a standby current as low as 3.5mA to meet the battery life requirements of portable devices. The ultra thin package of 3.2mm×2.5mm×1.0mm is suitable for high-density PCB layouts, and the reflow soldering process compatibility exceeds 99.5% to ensure the yield rate of mass production.

As the authorized agent of KDS, MANDU provides full-cycle technical support for the development of satellite positioning modules. In the solution selection stage, based on the clock demand model of the GNSS chipset, it provides compatibility analysis between the DSA211SDN and mainstream RF chips (such as u-blox ZED-F9P and AT6558 of Zhongke Micro). In the sample testing stage, it can assist in completing reliability verification such as temperature cycle testing and vibration characteristic analysis, and provide optimization suggestions for compensation curves. In the mass production stage, it realizes a 48-hour rapid response through an intelligent warehousing system, and cooperates with the on-site debugging service of the FAE team to ensure module performance compliance. R&D engineers can apply for DSA211SDN samples through the official channel of MANDU and obtain technical materials such as the “High-Precision Clock Design Guide” at the same time to shorten the development cycle.

For R&D teams pursuing positioning accuracy and environmental robustness, the KDS DSA211SDN TCXO is the preferred hardware design solution. Its comprehensive advantages in terms of frequency stability, anti-interference capability, and energy efficiency ratio can effectively solve the clock accuracy challenges in complex scenarios. Combined with MANDU's localized technical support and fast sample service, engineers can more efficiently realize the full-process optimization from principle design to product implementation, promoting the in-depth application of high-precision positioning technology in fields such as intelligent transportation and disaster monitoring. Choosing the KDS TCXO means building a reliable time reference for satellite positioning modules, helping to unlock more precise spatiotemporal perception and smarter scenario interaction experiences.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

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