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Custom LVDS Cable

LVDS cables transmit data over a pair of differential PCB wires or balanced cables, which can reach transmission rates of hundreds or even thousands of megabits per second (Mbps). LVDS is a low-amplitude differential signalling analogue technology that engineers can use to design mixed-signal systems.

Romtronic is a manufacturer from China with extensive experience in LVDS cable assemblies, we can provide customized solutions based on customer specifications or equivalent parts to save time and cost.

Our customized LVDS cables
Our customized LVDS cables

Our customised LVDS cable assemblies

Advantages of our customized LVDS cables

  1. Customized high-end complex LVDS cable assemblies are available.
  2. Accept small-batch production orders with affordable prices.
  3. Fast delivery, all processes (e.g. soldering, over moulding, and performance testing) are done in-house, usually within 10-15 business days.
  4. We are UL, CE & USB4 TID certified and offer a variety of connector configurations, cable types, and jacket material colour options to meet any special customization requirements.

View our LVDS cable production video

You may want to know more about LVDS cables

The most basic LVDS devices are the LVDS driver and receiver. The LVDS driver consists of a current source driving a differential pair of wires at a current of typically 3.5 mA. The LVDS receiver has a high input impedance, so most of the current at the output of the driver flows through the 100 Ω matching resistor and produces a voltage of approximately 350 mV at the input of the receiver. (A current source with a constant-current characteristic and a termination resistance between 100 and 120 Ω gives a voltage swing of: 3.5mA x 100 = 350Mv; 3.5mA x 120 = 420mV.)

When the driver is flipped, it changes the direction of current flow through the resistor, thus creating valid logic “1” and logic “0” states. It takes time to change from the logic “0” level to the logic “1” level. Since the physical level of LVDS signals varies between 0.85 and 1.55V, the time it takes to change from logic “0” level to logic “1” level is much faster than that of TTL. The time from the logic “0” level to the logic “1” level is much faster than that of the TTL level, so LVDS is more suitable for transmitting signals with high-speed change. LVDS is more suitable for transmitting signals that change at high speeds because of its low voltage and low power consumption.

LVDS Cable
LVDS Cable

LVDS technology is defined in two standards: ANSI/TIA/EIA644 (November 1995 adoption) and IEEE P1596.3 (March 1996 adoption). Both standards focus on defining LVDS’s electrical.
The electrical characteristics of LVDS are defined in both standards, including.

  1. low voltage, low swing (~350 mV), high speed. the LVDS physical interface uses a 1.2V bias voltage as a reference, providing a swing of ~350mV (0.85-1.55V), and the low current drive mode means that high-speed transmissions can be achieved, with a maximum rate of 655 Mb/s and a theoretical limit rate of 1.923 Gb/s on a distortion-free channel as recommended by ANSI/TIA/EIA644. Theoretical limit rates on distortion-free channels.
  2. Low power consumption. The constant-current source current drive, which limits the output current to about 3.5 mA or so, minimizes spike disturbances during the hopping period and thus produces very low power consumption. This permits a further increase in IC density, i.e., improved PCB board effectiveness and reduced cost.
  3. Has a relatively slow edge rate (dV / dt about 0.300 V / 0.3 ns, that is, 1 V / ns), while the use of differential transmission form, so that its signal noise and EMI are greatly reduced, but also has a strong anti-jamming ability.

Therefore, LVDS has the excellent characteristics of high speed, ultra-low power consumption, low noise, and low cost.

LVDS cables are mainly used to connect laptop motherboards and panels to transmit power and signals.

Application of LVDS products in other fields

  1. Medical equipment connection cables are characterized by accurate signal transmission.
  2. Connecting cell phone motherboards and panels for signal transmission is characterized by high transmission efficiency, stable impedance, and high bending strength.
  3. It is also used in DV, digital machines, LCD, and car navigation systems.

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