Optimization Scheme for Cable in Sony IMX623 High-Speed Interface Application

In the application of high-resolution image sensor, the continuous increase in data transmission rate has put forward higher requirements for signal integrity. As an image sensor that supports the high-speed interface SLVS-EC (Scalable Low Voltage Signaling with Embedded Clock), Sony IMX623 can achieve high-speed data output at multiple Gbps levels. However, at such high speeds, signal integrity issues have become a key factor affecting system stability and image quality. Choosing the appropriate transmission medium and optimizing the cable design have become important links to ensure high-performance image output.


 

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High-speed transmission characteristics of the SLVS-EC interface

SLVS-EC is an embedded clock differential signal standard developed by Sony for high-speed image transmission, characterized by low power consumption and high bandwidth. Its maximum transmission rate can reach several Gbps, and it has extremely high efficiency in the data link between image sensors and main control chips. However, under this high-speed condition, any slight signal interference, impedance mismatch, or crosstalk may cause bit inversion, jitter, or synchronization loss, leading to noise or frame errors in the image signal. Therefore, in order to maintain the high transmission quality of the SLVS-EC interface, impedance control of the signal path, shielding design, and selection of the transmission medium are particularly critical.

 

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The role of ultra-fine coaxial cable束 in signal integrity

Compared with traditional FPC ribbon cables, micro coaxial cable has a natural advantage in high-speed signal transmission.

The internal structure consists of a central conductor, an insulating layer, a shielding layer, and an outer sheath, and possesses excellent anti-interference performance and stable characteristic impedance control ability.

Strong anti-interference performance
Coaxial shielding layer effectively suppresses external electromagnetic interference, ensuring that the signal transmission process is not polluted by noise.

High-speed signal with high fidelity

A stable impedance matching structure ensures that extremely thin coaxial cables can still maintain good eye diagram opening and minimal signal distortion at data transmission rates of several Gbps.

3. Advantages of high-density wiring

Small diameter, high flexibility, capable of achieving multi-channel high-speed transmission within a limited space, it is very suitable for high-speed connection between sensor modules and main control boards.
In the application scenarios of IMX623, using micro coaxial cable can effectively improve the system signal integrity, ensuring stable transmission of high-speed image data over long distances or complex paths.


 

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Three, key techniques for harness layout

In order to fully utilize the performance of the ultra-fine coaxial cable bundle, the following key points should be noted when designing the SLVS-EC transmission path:

Length equal match
The SLVS-EC interface is a multi-channel synchronous transmission structure, and the signals of each channel need to maintain consistent delay. When wiring, it should control the length difference within a reasonable range.

2. Reasonable bending radius

Although the extremely thin coaxial cable has excellent flexibility, excessive bending can cause impedance突变, and sufficient bending radius should be maintained to prevent signal reflection.

3. Shielding ground treatment

A reasonable shielding and grounding design can effectively reduce crosstalk and common-mode interference, and improve the electromagnetic compatibility of the overall system.

4. Group wiring principles

The differential pairs should be kept closely spaced, with a safe distance from other signal lines, to avoid coupling interference between different groups.

Through the above optimization measures, the SLVS-EC interface can still maintain stability under high-frequency and high-speed working conditions, ensuring accurate and lossless transmission of image data.

Sony IMX623 uses the SLVS-EC high-speed interface, which has very high requirements for signal integrity. Choosing the appropriate micro coaxial cable, and combining design strategies such as equal-length matching, reasonable bending, shielding grounding, and grouping wiring, can not only significantly improve the quality of signal transmission but also effectively reduce error rate and EMI risk. In high-speed imaging systems, extremely fine coaxial cables are no longer just a simple connection medium, but a key component ensuring system performance and image quality.

I am[Suzhou Huichengyuan Electronic Technology]Long-term focus on the design and customization of high-speed signal cable harnesses and ultra-fine coaxial cable harnesses, committed to providing stable and reliable high-speed interconnection solutions. If you have any related needs or want to learn more, please contact:Manager Zhang 18913228573 (WeChat same number)。