The LVDS Specification

Solution:

• The LVDS Specification

  LVDS : (L)ow (V)oltage (D)ifferential (S)ignaling
  
  LVDS is a low swing, differential signaling technology which allows single
  channel data transmission at
  hundreds of Megabits per second (Mbps) over 15 meters. Its low swing (about
  350mV) and current mode
  driver outputs create low noise and provide a very low power consumption across
  frequency.
  
  The differential data transmission method used in LVDS is less susceptible to
  common-mode noise than single
  -ended schemes. Differential transmission uses two wires with opposite
  current/voltage swings instead of the
  one wire used in single-ended methods to convey data information. The advantage
  of the differential approach
  is that noise is coupled onto the two wires as common mode (the noise appears
  on both lines equally) and is
  thus rejected by the receivers which looks at only the difference between the
  two signals. The differential
  signals also tend to radiate less noise than single-ended signals due to the
  canceling of magnetic fields. And,
  the current mode driver is not prone to ringing and switching spikes, further
  reducing noise. Because differential
  technologies such as LVDS reduce concerns about noise, they can use lower
  signal voltage swings. This
  advantage is crucial, because it is impossible to raise data rates and lower
  power consumption without using low
  voltage swings. The low swing nature of the driver means data can be switched
  very quickly. Since the driver is
  also current mode, very low ?almost flat ?power consumption across frequency
  is achieved since the power
  consumed by the load (3.5mA x 350mV, 1.2mW) stays almost constant.
  
  ECG adopts LVDS technology in the single board design to meet the high
  resolution graphic, long distance
  transmission requirement. These include PCM-5820, PCM-5864, POS-562 & PCN-6351
  (build-in LVDS transmisstor).
  Besides, stand-along PC/104 form factor PCM-3540T (LVDS transmittor) and
  PCM-3540R (LVDS receiver)