Micro-Coax can replace LVDS? The core differences engineers must understand

In modern electronic devices, especially in the design of high-speed, high-frequency signal transmission, "micro-coaxial cable" and "LVDS line" are often mentioned together. Many engineers may wonder: What is the relationship between these two types of wires? Where are the differences and connections between them? The following analysis will be conducted from three perspectives: structural definition, application logic, and performance.

The difference in structure and definition. The ultra-fine coaxial cable assembly is a miniaturized coaxial cable structure, internally consisting of a central conductor, insulating medium, metal shielding layer, and outer sheath. Each signal line has an independent shielding layer, which makes it excellent in anti-interference and signal integrity, and is often used in high-precision scenarios such as camera modules, high-definition displays, and medical equipment. In contrast, LVDS is not a cable type but a signal transmission method. It transmits voltage difference through a pair of complementary conductors to cancel out external noise interference, with a typical impedance of 100Ω, and has the advantages of high-speed and low power consumption, widely used in notebook screens, industrial image systems, and camera interfaces. Simply put, micro-coax is a cable structure, while LVDS is a signal transmission method. The two are not opposed to each other but exist in a complementary relationship.

Why is the extremely fine coaxial cable suitable for carrying LVDS signals? From an electrical characteristics perspective, the independent shielding structure of the micro-coax can effectively reduce crosstalk and EMI interference, especially with significant advantages in complex electromagnetic environments; secondly, it has strict impedance consistency control, which can ensure that LVDS differential signals are phase-matched accurately and waveforms are complete during transmission; at the same time, its extremely fine wire diameter and flexible wiring can achieve high-density layout in thin and light equipment or narrow spaces. These characteristics make micro-coax an ideal physical carrier for LVDS signal transmission, and it is widely used in applications such as 4K/8K image transmission, drone image links, and medical probes.

Part 3: Performance Comparison and Design Significance:

In fact, there is no comparison between the ultra-fine coaxial cable束 and LVDS lines in terms of "who is better", but rather a complementary relationship in terms of function. LVDS defines the way signals are transmitted, while micro-coax provides a high-reliability physical channel. The former focuses on differential anti-interference at the electrical level, and the latter specializes in shielding and impedance control at the structural level. When used together, they can achieve both low power consumption and high bandwidth, as well as ensure signal integrity and system stability, making them the golden partners in modern high-speed interconnect systems.

In summary, the differences between ultra-fine coaxial cables and LVDS lines lie in the "structure" and "signal" levels. Micro-coax, with its excellent shielding properties and precise impedance control, provides a reliable physical foundation for LVDS signals. It is the synergy between the two that allows for the simultaneous consideration of efficiency and stability in high-resolution image transmission and high-speed data links.
I am[Suzhou Hui Cheng Yuan]Long-term focus on the design and customization of high-speed cable harnesses and ultra-fine coaxial cables, committed to providing stable and reliable high-speed interconnection solutions. If you have any related needs or want to learn more, please contact us:Manager Zhang 18913228573 (WeChat same number)。