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Topic: LVDS


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  LVDS Bus Interface Description
LVDS may be used with either a cable or board [PWB] interface [bus], and may be referenced by other specifications as their Electrical interfaces.
LVDS is designed with an output voltage swing of 350mV with speeds at better then 400Mbps into a 100 ohm load, across a distance of about 10 meters.
LVDS is a scalable bus; one uni-directional link or multiple links may be used.
www.interfacebus.com /Design_Connector_LVDS.html   (682 words)

  
 The secrets of successful communications using LVDS - 10/13/2005 - EDN
LVDS targets use in 100Ω environments and thus is unsuitable for loads greater than those that the TIA/EIA-644A standard specifies.
LVDS receivers accept an input of 0 to 2.4V, which means that the receiver can have a ground shift that can be approximately 1V.
LVDS is an appropriate technology for point-to-point- and multipoint-system technologies.
www.edn.com /article/CA6262544.html   (2174 words)

  
 Automotive ICs: Analog automotive products, LVDS technology, light-to-digital sensors, LED lighting, power management, ...
Intersil’s LVDS technology reduces cabling by serializing and deserializing (SERDES) parallel signals to one high-speed LVDS signal.
LVDS technology can be used anywhere there is a need for transporting high-speed digital data from multiple ports to a host for processing or display.
A cost-effective electrical link is a good alternative to optical links in most vehicles, and is used for routing video signals for navigation and entertainment.
www.intersil.com /auto   (672 words)

  
 LVDS Application Notes
LVDS provides higher noise immunity than single-ended techniques, allowing for higher transmission speeds, smaller signal swings, lower power consumption, and less electro-magnetic interference than single-ended signaling.
LVDS provides robust signaling for high-speed data transmission between chassis, boards, and peripherals using standard ribbon cables and IDC connectors with 100 mil header pins.
LVDS provides higher noise immunity than single-ended techniques, allowing for higher transmission speeds, smaller signal swings, lower power consumption, and less electromagnetic interference than single-ended signaling.
www.xilinx.com /xlnx/xweb/xil_publications_display.jsp?iLanguageID=1&category=-1209837&sGlobalNavPick=PROD&sSecondaryNavPick=   (1437 words)

  
 Pericom - Products - LVDS - Main Overview Page
The traditional way of using TTL signals between the image-scanning module and the image process unit board fails to provide the density data transmission at high speed to provide good signal integrity for printing.
LVDS transmission is the best way for the signal to link with high-speed, good signal integrity, and low EMI.
PI90LV017A acts as a LVDS driver supporting transmission data rates exceeding 400Mbps.
www.pericom.com /products/lvds/index.php   (137 words)

  
  Fairchild Semiconductor Interface Low Voltage Differential Signaling (LVDS) Products Technical Information
Low Voltage Differential Signaling (LVDS) is a low-power, low-noise differential technology for high speed transmission.
Optimized for point-to-point configurations in telecom, datacom, peripherals and displays, LVDS delivers the bandwidth necessary for driving large data rates over PCB and cable.
AN-5023 LVDS Compatibility with RS422 and RS485 Interface Standards
www.fairchildsemi.com /products/interface/lvds.html   (121 words)

  
 LVDS Splitter Simplifies High-Speed Signal Distribution - Maxim/Dallas
LVDS is seeing increased use in high-speed systems where signal integrity, low-jitter (jitter can be defined as the deviation in a signal's output transitions from their ideal positions in time) and good common-mode performance are required.
Many of the advantages of LVDS are due to its differential nature: it is immune to common-mode noise and, in theory, emits no noise itself (this assumes completely symmetrical differential signals - i.e., no skew between the positive and negative outputs).
Since LVDS is differential, the magnitude of current spikes drawn from its power supplies is lower and can be handled easier with suitably placed decoupling capacitors of reasonable value.
korea.maxim-ic.com /appnotes.cfm?an_pk=872   (1020 words)

  
 Low voltage differential signaling - Wikipedia, the free encyclopedia
LVDS is a differential signaling system, which means that it transmits two different voltages which are compared at the receiver.
LVDS is often used for serial data transmission, which involves sending data bit-by-bit down a single wire (as opposed to parallel transmission, in which several bits, usually in multiples of eight, are sent down many wires at once).
The present form of LVDS was preceded by an earlier attempt, SCI-LVD, which was a subset of the Scalable Coherent Interconnect (SCI) specified in the IEEE 1596.3 standard.
en.wikipedia.org /wiki/LVDS   (925 words)

  
 CommsDesign - Secrets Revealed: Creating accurate LVDS IBIS models   (Site not responding. Last check: 2007-10-26)
LVDS (Low Voltage Differential Signaling) is emerging as the serial I/O technology of choice in communications systems because they offer the advantage of very high speed--up to 40 Gbit/s--with reduction in bus width and power.
For example, when the non-inverting output of a LVDS device has an output voltage of 1.5V, then through compensation by internal circuitry of the device the voltage at the inverting output will attempt to reach 1.0V such that the sum of voltages between the outputs is equal to 2V(OS).
In this case, data is being gained for the non-inverting output of the LVDS device, so a dependent voltage source should be put on the output of the inverting output such that a constant voltage equal to 2V(OS) can be maintained between the inverting and non-inverting outputs during the DC voltage sweep.
www.commsdesign.com /design_corner/showArticle.jhtml?articleID=12802090   (4804 words)

  
 LVDS (Low-Voltage Differential Signaling) (Linktionary term)
LVDS is an industry standard that defines a high-speed, low-power, data-signaling technique that is implemented in a variety of connection technologies.
LVDS is also used in digital camera interfaces and has even been used to drive LCD displays in laptop computers.
LVDS cuts down on noise and boosts data rates by using extremely low voltage levels (350 mV compares to 2.4 V), which translates to low radiation and less power consumption.
www.linktionary.com /l/lvds.html   (404 words)

  
 LVDS Enables High-Speed Signal Distribution in 3G Basestations - Maxim/Dallas   (Site not responding. Last check: 2007-10-26)
LVDS is a physical layer data interface standard defined by the TIA/EIA-644 and the IEEE 1596.3 standards.
Like other differential signaling standards, LVDS radiates less noise than single-ended signals due to the canceling of magnetic fields, and is more immune to noise because it is coupled onto the two wires as a common-mode signal (i.e., equal levels of noise appear on both lines).
An LVDS serializer, used in combination with a deserializer (not shown), eliminates the wide data buses and associated large, expensive backplanes required when standard TTL signaling is used.
www.maxim-ic.com.cn /appnotes.cfm?an_pk=1058   (1526 words)

  
 LVDS Solves EMI Problems in Ultra-Portable Applications:ECN Asia
To illustrate the differences between the LVDS and LVTTL, the spectral content was displayed at the fundamental frequency of 100 MHz (Figures 1a and 1b); at 95 to 305 MHz (Figures 2a and 2b); and at 100 MHz to 1 GHz (Figures 3a and 3b).
LVDS technology has come of age, offering a number of important benefits to designers of ultra-portable devices, including incremental improvements in product performance.
LVDS standards-based interface devices are designed and characterized to provide excellent signal integrity well into 500 MB/s data rates and beyond.
www.ecnasiamag.com /article.asp?id=5072   (1047 words)

  
 [No title]
The ultimate rate and distance of LVDS data transfer is dependent on the attenuation characteristics of the media and the noise coupling to the environment.
LVDS has a center at 1.2 V and the 250 mV differential signals provide the advantage of reducing noise impact such as crosstalk and EMI when transmitting very high data rates over wire.
This LVDS data and clock are presented at the deserializing receiver, which recovers the LVDS data and clock and performs a conversion back to TTL.
archive.chipcenter.com /analog/c024.htm   (1050 words)

  
 EETimes.com - LVDS, CML, ECL-differential interfaces with odd voltages
LVDS is standardized as an electrical layer standard by the TIA and is published as ANSI/TIA/EIA-644-A. An IEEE project at that time was working on a standard known as SCI, which originally specified an ECL interface.
LVDS is a high-speed and low-power differential interface for generic applications.
Figure 3: Multipoint LVDS bus terminated by two parallel terminations which are equal to 100 Ohms or the effective loaded impedance of the bus - typically in the 54 to 100 Ohm range.
www.eetimes.com /story/OEG20030121S0059   (3119 words)

  
 STMicroelectronics | INTERFACING BETWEEN LVDS AND HIGH SPEED DIFFERENTIAL LOGIC FAMILIES
LVDS signals are differential signal technologies with a swing of 250 to 400mV and a DC offset of 1.2V.
LVDS technology is not dependent on a specific power supply, meaning that there is an easy migration path to lower supply voltages, such as 3.3V or even 2.5V, while still maintaining the same performance.
This is because the LVDS output common mode and differential voltage are not compatible with PECL input levels.
www.st.com /stonline/books/ascii/docs/7622.htm   (1287 words)

  
 LVDS Definition
LVDS sends data over data high and data low lines rather than data and ground.
LVDS is used in SCSI bus signaling to increase cable lengths to 40 feet compared to 20 feet for single-ended signals (data and ground).
In some desktop flat panels, LVDS is used between the image scaler and the panel.
www.pcmag.com /encyclopedia_term/0,2542,t=LVDS&i=46400,00.asp   (693 words)

  
 Embedded.com - M-LVDS: A New Standard for High-Speed Multipoint Data Buses
LVDS is seeing rapid acceptance throughout the electronics industry as a replacement for slower-speed, higher-power options such as TIA/EIA-422 or single-ended solutions.
LVDS likewise offers a low-power alternative to ECL logic parts when speed is a predominant concern.
LVDS specified a minimum transition time of 260 picoseconds out of the driver, while the smallest transition time allowed by M-LVDS is 1 nanosecond, resulting in the maximum signaling rate of 500 Mbps.
www.embedded.com /showArticle.jhtml?articleID=192200717   (2535 words)

  
 jnicolle.com - LVDS
LVDS is a way to transfer large amount of data between chips, while keeping power consumption and wire count low.
LVDS uses a differential mode of transmission, so every channel uses a pair of lines.
Because each LVDS pair can reach speeds up to 1Gbps, their line termination is of critical importance.
www.jnicolle.com /?page=LVDS   (208 words)

  
 Geforce2 LVDS? - MP3Car.com Forums
LVDS is somewhat of a generic technology used in many types of electronics to transmit signals over long distances.
DVI is a different than the "LVDS LCD standard", but it does use the same base Low-Voltage-Differential-Signal-ing / TMDS technology.
A soldering genius would have to attach their "experimental daughterboard" to the mobo for it to support lvds.
www.mp3car.com /vbulletin/showthread.php?p=93571   (289 words)

  
 What is LVDS? - A Word Definition From the Webopedia Computer Dictionary
LVDS differs from normal input/output (I/O) in a few ways:
LVDS uses a dual wire system, running 180 degrees of each other.
But with LVDS, data storage is distinguished only by positive and negative voltage values, not the voltage level.
www.webopedia.com /TERM/L/LVDS.html   (270 words)

  
 diyAudio Forums - Taking serial audio outside the box with LVDS
LVDS transceivers are fairly used in the Mark Levinson D/A-converters.
LVDS is used a lot for data transfer from one chassis to another in HDTV broadcast systems.
My plan with the CAT5 cable is to use a precision oscillator *at the receiving end*, transmit it over an LVDS pair to the disk player to replace the player's original clock source, and then have it reflected back by a transmitter back to the receiver along with the data.
www.diyaudio.com /forums/showthread.php?postid=63637   (1037 words)

  
 LVDS Comparison: APEX 20KE vs. Virtex-E Devices   (Site not responding. Last check: 2007-10-26)
Virtex-E devices have emulated the LVDS I/O interface using device resources such as configurable logic blocks (CLBs), block RAM, and on-board components such as external resistor packs.
LVDS emulation in Virtex-E devices leads to degraded performance and poor signal quality.
Using LVDS in APEX 20KE Devices White Paper, ver.
www.altera.com /products/devices/apex/features/apx-complvds.html   (300 words)

  
 LVDS support becomes critical for higher speeds - News - low-voltage differential signaling - Technical Electronic News ...   (Site not responding. Last check: 2007-10-26)
LVDS support becomes critical for higher speeds - News - low-voltage differential signaling - Technical
The collaborative effort is particularly notable because the two companies combined have a multibillion-dollar business invested in the interface ICs for the mature, mainstream 110 schemes, such as RS 45.
Xilinx, Altera and the rest of the band, with their powerful communications constituency, are pouring AEs into support for LVDS interfaces as fast as they can.
www.findarticles.com /p/articles/mi_m0EKF/is_4_48/ai_82571908   (811 words)

  
 LVDS ups A/D converter data rates
Basically, LVDS is a new differential logic family that requires two pins for each signal and is well-suited for high-speed digital transmission.
The LVDS output common-mode voltage specification is app roximately 1.2 V and is maintained by a common-mode control circuit that is not shown.
LVDS power dissipation is constant and does not scale linearly with clock rates as in CMOS; at low sample rates CMOS can dissipate less power than LVDS.
www.us.design-reuse.com /articles/article4057.html   (1017 words)

  
 High-Speed Signal Distribution Using Low-Voltage Differential Signaling (LVDS) - Maxim/Dallas
Low-voltage differential signaling (LVDS) is well-suited for a variety of applications, including clock distribution and point-to-multipoint signal distribution.
When signaling speeds break well into the tens and hundreds of MHz, LVDS devices are often a better choice for accomplishing that signaling than TTL.
Integrated circuits based on LVDS technology are useful in many applications, including the distribution of clock and serial data signals at speeds of up to 400Mbps and higher.
korea.maxim-ic.com /appnotes.cfm?an_pk=873   (1055 words)

  
 The Secrets of Successful Communications Using LVDS:Wireless Design & Development   (Site not responding. Last check: 2007-10-26)
LVDS drivers have a common mode output range of 1.125V to 1.375V.
LVDS receivers accept an input from 0V to 2.4V.
LVDS is the technology of choice for numerous applications.
www.wirelessdesignasia.com /article.asp?id=2718   (1215 words)

  
 reconfigurable user programmable logic PCI Altera RS485 LVDS TTL
Each of the RS-485 or LVDS channels is programmable for direction, termination and function.
The LVDS and most recently the PROM addition are examples.
The standard 485 are 5V parts and the LVDS is 3.3.
www.dyneng.com /pci_altera_485.html   (1699 words)

  
 Altera's APEX True-LVDS Solution   (Site not responding. Last check: 2007-10-26)
When analyzing LVDS I/O performance, it is important to consider various specifications including channel skew on the output pins and the maximum receiver input skew margin.
An "eye diagram" is a visual representation of the jitter and output driver quality of an LVDS output signal.
It is obtained by sending pseudo-random data over the LVDS channel and using a sampling oscilloscope to perform a persistence measurement.
www.altera.com /products/devices/apex/features/apx-true_lvds.html   (579 words)

  
 Interfacing to LVDS with the NI 655X Digital Waveform Generator/Analyzer- Developer Zone - National Instruments
The LVDS specification allows for an input voltage range from 0 to 2.4V, so a wide range of acceptable values are available.
For an example of what happens if the correct settings are not used, assume both ends of an LVDS signal were wired directly to two input terminals on the NI 655X, each with 50 Ω input impedance.
Depending on the LVDS device that you use, some current may be drawn through the negative leg of the signal, so the resulting voltage on channel 1 will be less than 1.2 V. The driver also inverts the signal, causing channel 0 to see the lower voltage (figure 8).
zone.ni.com /devzone/cda/tut/p/id/3528   (1861 words)

  
 Analog-to-Digital Converter features serial LVDS outputs., National Semiconductor C
The LVDS outputs reduce system noise while decreasing the number of input/output (I/O) pins and traces, enabling easier signal routing and flexible system partitioning.
National Semiconductor's LVDS technology is a low-power, low-noise method for high-speed data transmission over copper interconnects.
LVDS solves current and future high-performance data transmission challenges in bandwidth-hungry applications by delivering data at gigabits per second at milliwatts of power.
news.thomasnet.com /fullstory/494984   (1088 words)

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