SDI Interfaces

 As a pioneer in digital video, Semtech’s Gennum Products continue to lead the way in proven UHD-SDI/12G, 3G, HD and SD technologies. Semtech continues its leadership in SDI technology by being first to market with an array of advanced UHD-SDI solutions. In fact, there’s a good chance that any TV broadcast or professional video passed through several Semtech components.

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GS12281-INE3

12G low-power, multi-rate, re-timing cable driver

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Description

The GS12281 is a low-power, multi-rate, re-timing cable driver supporting rates up to 12G UHD-SDI. It is designed to receive 100Ohm differential input signals, automatically recover the embedded clock from the digital video signal and re-time the incoming data, and transmit the re-timed signal over 75Ohm coaxial cables. The 100Ohm trace input supports up to 17dB of insertion loss.The device supports SMPTE ST 2082-1 (12G UHD-SDI), ST 2081-1 (6G UHD-SDI), ST 424 (3G SDI), ST 292-1 (HD-SDI) and ST 259 (SD-SDI). In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s, MADI at 125Mb/s, and 10GbE. The two cable drivers have highly configurable pre-emphasis and swing controls to compensate for long trace and connector losses. Additionally, automatic and user selectable output slew rate control is provided for each cable driver output.

Features


  • Dual non-inverted 75Ω cable interface with on-chip termination
  • SMPTE ST 2082-1, ST 2081-1, ST 424, ST 292-1 and ST 259 compliant input/output
  • Multi-standard operation from 1Mb/s to 11.88Gb/s
  • In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s, and MADI at 125Mb/s.
  • 3D Input Signal Eye Monitor
  • PRBS generator and checker
  • Cable driver mode features:
    • Wide swing control
    • Pre-emphasis to compensate for significant insertion loss between device output and BNC
    • Automatic/manual output slew rate control
    • Manual or automatic re-timer bypass
    • Manual or automatic Mute or disable on LOS
  • Trace equalizer features:
    • Integrated 100Ω, differential input termination
    • Automatic power down on loss of signal
    • Adjustable carrier detect threshold
    • DC-coupling from 1.2V to 2.5V CML logic
    • Trace equalization to compensate for up to 20” FR4 at 11.88Gb/s
    • Automatic input offset compensation
  • CDR features:
    • Manual or automatic rate modes
    • Wide Loop bandwidth control
    • Re-timing at the following data rates: 125Mb/s, 270Mb/s, 1.485Gb/s, 2.97Gb/s, 5.94Gb/s, and 11.88Gb/s. This includes the f/1.001 rates.
  • Single 1.8V power supply for analog and digital core
  • 2.5V or 3.3V for cable driver output supply
  • GSPI serial control and monitoring interface
  • Four configurable GPIO pins for control or status monitoring
  • Wide operating temperature range: -40ºC to +85ºC
  • Small 6mm x 4mm 40-pin QFN
  • Pin compatible with the GS12181, GS12182, GS12081, and GS3281
  • Pb-free/Halogen-free/RoHS and WEEE compliant package

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