The EL4543 is a high bandwidth triple differential amplifier with integrated encoding of video sync signals. The inputs are suitable for handling High-Speed video or other communications signals in either single-ended or differential form, and the common-mode input range extends all the way to the negative rail enabling ground-referenced signalling in single supply applications. The high bandwidth enables differential signalling onto standard twisted-pair or coax with very low harmonic distortion, while internal feedback ensures balanced gain and phase at the outputs reducing radiated EMI and harmonics. Embedded logic encodes standard video horizontal and vertical sync signals onto the common mode of the twisted pair(s), transmitting this additional information without the requirement for additional buffers or transmission lines. The EL4543 enables significant system cost savings when compared with discrete line driver alternatives. The EL4543 is available in both a 24 Ld QSOP package and a 20 Ld QFN package and is specified for operation over the -40°C to +85°C temperature range.


  • Fully differential inputs, outputs, and feedback
  • 350MHz -3dB bandwidth
  • 1200V/µs slew rate
  • -75dB distortion at 5MHz
  • Single 5V to 12V operation
  • 50mA minimum output current
  • Low power - 36mA total typical supply current
  • Pb-free available (RoHS compliant)


  • Twisted-pair drivers
  • Differential line drivers
  • VGA over twisted-pair
  • Transmission of analog signals in a noisy environment

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Last Time Buy QFN Tube 90
Last Time Buy QFN Reel 2500
Last Time Buy QFN Reel 1000
Active QSOP Tube 55
Active QSOP Reel 2500
Active QSOP Reel 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
EL4543 Datasheet Datasheet PDF 1.08 MB
Application Notes & White Papers
How to Bias Op-Amps Correctly Application Note PDF 263 KB
AN1993: Voltage Feedback versus Current Feedback Operational Amplifiers Application Note PDF 564 KB
AN1484: Extending the KVM Video Range to 1.5k Ft Application Note PDF 957 KB
AN1266: EL4543 CAT-5 CMV Offset Network Recovers Usable CMV Range at Receiver Application Note PDF 497 KB
AN1318: Transmitting SXGA Video Signal through 1kft (300m) CAT-5 Cable Application Note PDF 459 KB
AN1694: The Four Basic Building Blocks of an Op Amp Application Note PDF 357 KB
AN535: Design Considerations for a Data Acquisition System (DAS) Application Note PDF 843 KB
PCN12091 - QSOP and SC-70 from Unisem to CAM as alternate assembly site Product Change Notice PDF 529 KB
PCN12084 - Manufacturing Site Change for the Listed Intersil Products - Carsem (CAS) Ipoh Malaysia Product Change Notice PDF 135 KB
EL4543 Reference Design Design File PDF 191 KB
PLC20036 - 2H EOL 2020 Product Life Cycle Notice PDF 319 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB
TB514: Operational Amplifier Basics Other PDF 519 KB
PA14042 - Minimum Line Quantity Change Product Advisory PDF 363 KB
General-purpose operational amplifiers and comparators Pamphlet ( D18268EJ2V0PF00 ) Flyer PDF 1.11 MB