LVDS Interface
LVDS, Low Voltage Diferential Signaling, is a low voltage differential signaling technology interface. It is a digital video signal transmission method developed by NS to overcome the shortcomings of high power consumption and EMI electromagnetic interference when transmitting broadband high bit rate data at TTL level.
The LVDS output interface utilizes a very low voltage swing (about 350mV) to transmit data through differential, i.e., low-voltage differential signaling on two PCB traces or a pair of balanced cables. The LVDS output interface enables signals to be transmitted at rates of several hundred Mbits over differential PCB traces or balanced cables, and low noise and power consumption are realized due to the low voltage and low current drive method.
LVDS stands for Low Voltage Differential Signaling and is a low noise, low power, low amplitude general purpose interface standard that solves bottleneck problems while serving a wide range of applications. LVDS copper-clad cables support the transmission of data at high speeds (Gigabits per second).
Low Voltage – LVDS technology does not rely on a specific power supply, such as +5V, meaning that a design can easily be plugged into a lower supply voltage, such as +3V or even lower, while continuing to maintain the same level signal and performance.
Differential Signaling – LVDS uses a two-wire system running 180 degrees from each other, with the normal data I/O ports at a high voltage of 5v (binary 1) and a low voltage of 0v (binary 0). When using a differential, a third party option (5v voltage) would need to be added to provide an additional level to encode the data. The receiver treats noise coupled to the interconnect as common-mode modulation, which can be easily filtered out. The receiver only feeds back the differential voltage, which is why the LVDS interface has better EMI immunity.
