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Circuitos integrados de interfaz digital serie (SDI)

LMH1297

ACTIVO

E/S UHD-SDI bidireccional de 12 G con reclocker integrado

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LMH1297

ACTIVO
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Detalles del producto

Function Cable driver, Cable driver with reclocker, Config I/O, Equalizer, Equalizer with reclocker Power consumption (mW) 300 Data rate (max) (Mbps) 11880 Control interface Pin, SMBus, SPI Operating temperature range (°C) -40 to 85
Function Cable driver, Cable driver with reclocker, Config I/O, Equalizer, Equalizer with reclocker Power consumption (mW) 300 Data rate (max) (Mbps) 11880 Control interface Pin, SMBus, SPI Operating temperature range (°C) -40 to 85
WQFN (RTV) 32 25 mm² (5 mm × 5 mm)
  • User-configurable adaptive cable equalizer or cable driver with integrated reclocker
  • Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-424 (3G), ST-292 (HD), and ST-259 (SD)
  • Compatible with DVB-ASI and AES10 (MADI)
  • Integrated reclocker locks to SMPTE rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps, or divide-by-1.001 sub-rates and 270 Mbps
  • On-chip 75-Ω termination and return loss compensation network
  • EQ (equalizer) mode:
    • Adaptive cable equalizer with integrated reclocker
    • 100-Ω output driver with de-emphasis
    • Reclocked 75-Ω loop-through output
    • EQ mode cable reach (Belden 1694A, SDI_OUT disabled):
      • 75 m at 11.88 Gbps
      • 120 m at 5.94 Gbps
      • 200 m at 2.97 Gbps
      • 300 m at 1.485 Gbps
      • 600 m at 270 Mbps
  • Cable driver (CD) mode:
    • Dual differential output cable drivers with integrated reclocker
    • Adaptive PCB input equalizer
    • Reclocked 100-Ω loopback output
  • Automatic pre-emphasis and slew rate control on 75-Ω outputs
  • Polarity inversion on 75-Ω and 100-Ω outputs
  • Automatic power save in absence of input signal
    • Power dissipation: 25 mW (typical)
  • Power-down control through ENABLE pin
  • Single 2.5-V supply
    • EQ mode power dissipation: 275 mW (typical)
    • CD mode power dissipation: 305 mW (typical)
  • Programmable through pins, SPI, or SMBus interface
  • –40°C to +85°C operating temperature range
  • 5-mm × 5-mm, 32-Pin QFN package
  • User-configurable adaptive cable equalizer or cable driver with integrated reclocker
  • Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-424 (3G), ST-292 (HD), and ST-259 (SD)
  • Compatible with DVB-ASI and AES10 (MADI)
  • Integrated reclocker locks to SMPTE rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps, or divide-by-1.001 sub-rates and 270 Mbps
  • On-chip 75-Ω termination and return loss compensation network
  • EQ (equalizer) mode:
    • Adaptive cable equalizer with integrated reclocker
    • 100-Ω output driver with de-emphasis
    • Reclocked 75-Ω loop-through output
    • EQ mode cable reach (Belden 1694A, SDI_OUT disabled):
      • 75 m at 11.88 Gbps
      • 120 m at 5.94 Gbps
      • 200 m at 2.97 Gbps
      • 300 m at 1.485 Gbps
      • 600 m at 270 Mbps
  • Cable driver (CD) mode:
    • Dual differential output cable drivers with integrated reclocker
    • Adaptive PCB input equalizer
    • Reclocked 100-Ω loopback output
  • Automatic pre-emphasis and slew rate control on 75-Ω outputs
  • Polarity inversion on 75-Ω and 100-Ω outputs
  • Automatic power save in absence of input signal
    • Power dissipation: 25 mW (typical)
  • Power-down control through ENABLE pin
  • Single 2.5-V supply
    • EQ mode power dissipation: 275 mW (typical)
    • CD mode power dissipation: 305 mW (typical)
  • Programmable through pins, SPI, or SMBus interface
  • –40°C to +85°C operating temperature range
  • 5-mm × 5-mm, 32-Pin QFN package

The LMH1297 is a 12G UHD-SDI 75-Ω bidirectional I/O with integrated reclocker. This device can be configured either in input mode as an adaptive cable equalizer or in output mode as a dual cable driver, allowing system designers the flexibility to use a single BNC either as an input or output port, simplifying UHD video hardware designs. The integrated reclocker locks to all supported SMPTE data rates up to 11.88 Gbps in both modes. The bidirectional I/O has an on-chip 75-Ω termination and return loss compensation network that meets the stringent SMPTE return loss requirements.

An additional 75-Ω driver output allows the LMH1297 to support a variety of system functions. In EQ (Equalizer) mode, this second 75-Ω driver can be used as a loop-through output. In Cable Driver (CD) mode, this 75-Ω driver can be used as a second fan-out cable driver. The host-side 100-Ω driver can also be used as a loop-back output in CD mode for monitoring purposes.

The LMH1297 is a 12G UHD-SDI 75-Ω bidirectional I/O with integrated reclocker. This device can be configured either in input mode as an adaptive cable equalizer or in output mode as a dual cable driver, allowing system designers the flexibility to use a single BNC either as an input or output port, simplifying UHD video hardware designs. The integrated reclocker locks to all supported SMPTE data rates up to 11.88 Gbps in both modes. The bidirectional I/O has an on-chip 75-Ω termination and return loss compensation network that meets the stringent SMPTE return loss requirements.

An additional 75-Ω driver output allows the LMH1297 to support a variety of system functions. In EQ (Equalizer) mode, this second 75-Ω driver can be used as a loop-through output. In Cable Driver (CD) mode, this 75-Ω driver can be used as a second fan-out cable driver. The host-side 100-Ω driver can also be used as a loop-back output in CD mode for monitoring purposes.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LMH1297 12G UHD-SDI Bidirectional I/O With Integrated Reclocker datasheet (Rev. E) PDF | HTML 30/10/2020
Nota sobre la aplicación LMH121x 12G SDI PCB Layout Guidelines 19/02/2020
Nota sobre la aplicación LMH12xx MADI Compatibility Application Note PDF | HTML 30/08/2018
Nota sobre la aplicación Simplifying 4K SDI Video Design with a Bidrectional I/O 31/10/2017
Artículo técnico Three reasons why a bidirectional I/O will simplify your next 4K video design PDF | HTML 6/09/2017

Diseño y desarrollo

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Placa de evaluación

LMH1297EVM — Módulo de evaluación LMH1297 de E/S bidireccional de 12 G

El LMH1297EVM es un módulo de evaluación (EVM) diseñado para un rendimiento de alta velocidad y la evaluación funcional de la E/S bidireccional de ultra alta definición (UHD)-interfaz digital en serie (SDI) LMH1297 de 12 G de Texas Instruments con reclocker integrado. Con este kit, puede evaluar (...)
Guía del usuario: PDF
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