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AD8194:  Buffered 2:1 TMDS Switch with Equalization

Product Details

The AD8194 is a low cost quad 2:1 TMDS® switch for high speed HDMI™/DVI video applications. The AD8194 features equalized inputs, ideal for systems with long cable runs. Its primary function is to switch the high speed signals from one of two single-link (HDMI or DVI) sources to the single-link output. The AD8194 is a fully buffered switch solution with 50 Ω input and output terminations, providing full-swing output signal recovery and minimizing reflections for improved system signal integrity.

The AD8194 is provided in a space-saving, 32-lead, LFCSP, surface-mount, RoHS-compliant, plastic package and is specified to operate over the −40°C to +85°C temperature range.

Product Highlights

  1. Data supports rates up to 2.25 Gbps, enabling greater than 1080p deep color (12-bit color) HDMI formats and greater than UXGA (1600 × 2300) DVI resolutions.
  2. Fully buffered inputs and outputs.
  3. Input cable equalizer enables use of long cables at the input. For a typical 24 AWG cable, the AD8194 compen-sates for more than 20 m at data rates up to 2.25 Gbps.
  4. Matched 50 Ω on-chip input and output terminations improve system signal integrity.
  5. Single-pin source select bit.
  6. Low added jitter.


  • Advanced television (HDTV) sets
  • Multiple input displays
  • Projectors
  • A/V receivers
  • Set-top boxes

Data Sheet, Rev. 0, 11/07


  • 2 inputs, 1 output HDMI/DVI high speed signal switch
  • Pin-to-pin compatible with the AD8193
  • Enables HDMI 1.3-compliant receiver
  • 4 TMDS channels per input/output
    Supports 250 Mbps to 2.25 Gbps data rates
    Supports 25 MHz to 225 MHz pixel clocks
    Fully buffered unidirectional inputs/outputs
    Equalized inputs for operation with long HDMI cables (20 m at 2.25 Gbps)
  • Matched 50 Ω input and output on-chip terminations
    Low added jitter
    Single-supply operation (3.3 V)
  • Standards compliant: HDMI receiver, DVI
  • 32-lead, 5 mm × 5 mm, RoHS-compliant LFCSP

Functional Block Diagram for AD8194


AdvantivAdditional product choices for Advanced TV applications are available on the Advantiv® site.


Title Content Type File Type
AD8194: Buffered 2:1 TMDS Switch with Equalization Data Sheet (Rev 0, 11/2007) (pdf, 456 kB) Data Sheets PDF
Analysis of Common Failures of HDMI CT
By Brett Li and Lie Dou, ATV Product Line, Analog Devices
(Digital TV DesignLine, 4/2/2008)
Technical Articles HTML
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Product Reviews HTML
Analog Devices in Advanced TV Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD8194 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
AD8194-EVALZ Status: Production Evaluation Board $759.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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