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Semtech GS12190 Relocking Cable Equalizers

Semtech GS12190 Relocking Cable Equalizers are low-power and configurable multi-rate relocking equalizers optimized for performance at 11.88Gbps. These equalizers support rates of up to 12G UHD-SDI and can be configured to equalize or drive signals over 75Ω coaxial cable. The GS12190 equalizers are capable of achieving extremely low output jitter even at extended cable/trace lengths. These equalizers include DC restoration to compensate for the DC content of SMPTE pathological test patterns. The GS12190 also supports reclocking of DVB-ASI at 270Mbps and MADI at 125Mbps. These equalizers also consist of automatic and user-selectable output slew rate control for cable driver output. Typical applications include cameras, switchers, distribution amplifiers, and routers.

Features

  • Single bidirectional 75Ω cable interface with on-chip termination
  • On-die connection between equalizer and cable
  • 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
  • Supports reclocking for DVB-ASI at 270Mb/s and MADI at 125Mb/s
  • 3D input signal eye monitor
  • PRBS generator and checker
  • Automatic cable equalization with typical equalized cable lengths of Belden 1694A cable:
    • 70m @ 11.88Gb/s
    • 80m @ 5.94Gb/s
    • 170m @ 2.97Gb/s
    • 240m @ 1.485Gb/s
    • 400m @ 270Mb/s
  • Cable equalizer mode:
    • Improved reach with stress patterns
    • Manual or automatic power-down on loss of signal
    • Programmable carrier detect with squelch threshold adjustment
    • Manual and automatic cable equalizer bypass
  • Cable driver mode:
    • Wide swing control
    • Pre-emphasis to compensate for significant insertion loss between device output and BNC
    • Manual or automatic power-down on loss of signal
    • Manual or automatic Mute or Disable on LOS
  • Trace Equalizer:
    • Integrated 100Ω differential input termination
    • Manual or 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
  • Trace driver:
    • Integrated 100Ω differential output termination
    • DC-coupling from 1.2V to 2.5V CML logic
    • Trace driver data output pre-emphasis to compensate for up to 20” FR4 at 11.88Gb/s
    • Manual or automatic mute or disable on LOS
  • Reclocker:
    • Manual or automatic rate modes
    • Manual or automatic reclocker bypass
    • Wide-range loop bandwidth control
    • Reclocking at 125Mb/s, 270Mb/s, 1.485Gb/s, 2.97Gb/s, 5.94Gb/s, and 11.88Gb/s

Applications

  • Cameras
  • Switchers
  • Distribution amplifiers
  • Routers

Specifications

  • Single 1.8V power supply for analogue and digital core
  • 2.5V for cable driver output supply
  • 1.2V, 1.8V, or 2.5V for trace driver output supply
  • GSPI serial control and monitoring interface
  • 4x GPIO pins for control or status monitoring
  • -40°C to 85°C wide operating temperature range
  • Small 6mm x 4mm 40-pin QFN
  • Pin-compatible with the GS12090 and GS3590
  • Pb-free/Halogen-free/RoHS & WEEE compliant

Block Diagram

Block Diagram - Semtech GS12190 Relocking Cable Equalizers

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Published: 2019-11-27 | Updated: 2023-06-14