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Texas Instruments LMH1219 12G-SDI Adaptive Cable Equalizer

Texas Instruments LMH1219 12G-SDI Adaptive Cable Equalizer is a low-power, dual-input and dual-output, adaptive equalizer with an integrated reclocker. It supports SMPTE video rates up to 11.88Gbps and 10GbE video over IP, enabling UHD video for 4K/8K applications. An extended reach adaptive cable equalizer at IN0 is designed to equalize data transmitted over 75Ω coaxial cable and operates over a wide range of data rates from 125Mbps to 11.88Gbps. An adaptive board trace equalizer at IN1 is SFF-8431 compatible and supports both SMPTE and 10GbE data rates. The integrated reclocker on the Texas Instruments LMH1219 attenuates high-frequency jitter and provides excellent signal integrity. High input jitter tolerance of the reclocker improves timing margin. The reclocker has a built-in loop filter and operates without the need for a precision input reference clock. A non-disruptive eye monitor allows real-time serial data measurement to simplify system debug and accelerate board bring-up.

Features

  • Supports ST-2082-1(12G), ST-2081-1(6G), ST-424(3G), ST-292(HD), and ST-259(SD)
  • Supports SFF8431 (SFP+) for SMPTE 2022-5/6
  • Compatible with DVB-ASI and AES10 (MADI)
  • Integrated reference-less reclocker locks to SMPTE and 10GbE rate (11.88Gbps, 5.94Gbps, 2.97Gbps, 1.485Gbps, or divide-by-1.001)
  • Sub-rates of 270Mbps and 10.3125Gbps
  • Adaptive cable equalizer at input 0 (IN0)
  • Cable reach (Belden 1694A)
    • 75m at 11.88Gbps (4Kp60 UHD)
    • 120m at 5.94Gbps (UHD)
    • 200m at 2.97Gbps (FHD)
    • 280m at 1.485Gbps (HD)
    • 600m at 270Mbps (SD)
  • Adaptive board trace equalizer at input 1 (IN1)
  • 250mW (typ.) low power 
  • 27mW power-saving mode 
  • Integrated input return loss network
  • 2:1 input Mux, 1:2 fanout output with de-emphasis

Applications

  • Supports signal splitter mode (–6dB launch amplitude)
  • On-chip loop filter capacitor and eye monitor
  • Powers from single 2.5V with on-chip 1.8V regulator
  • Configurable by control pins, SPI, or SMBus interface
  • 4mm×4-pin QFN package
  • –40°C to 85°C operating temperature range 

Simplified Block Diagram

Block Diagram - Texas Instruments LMH1219 12G-SDI Adaptive Cable Equalizer
Published: 2016-07-15 | Updated: 2022-03-11