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LMH0318

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3G HD/SD SDI reclocker with integrated cable driver

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Data sheet

LMH0318

ACTIVE
Data sheet Order now

Product details

Function Cable driver, Reclocker, Reclocker with cable driver Power consumption (mW) 300 Data rate (Max) (Gbps) 2.97 Control interface SMBus, SPI Operating temperature range (C) -40 to 85
Function Cable driver, Reclocker, Reclocker with cable driver Power consumption (mW) 300 Data rate (Max) (Gbps) 2.97 Control interface SMBus, SPI Operating temperature range (C) -40 to 85
WQFN (RTW) 24 16 mm² 4 x 4
  • Supports ST 424(3G), 292(HD), 259(SD), MADI, and
    DVB-ASI
  • Locks to rates 2.97 Gbps, 1.485 Gbps, or Divided
    by 1.001 sub-rates, and DVB-ASI
  • Reference-free Operation with Fast Lock Time
    covering all Supported or Selected Data Rates
  • 75 Ω and 100 Ω Transmitter Outputs
  • Integrated 2:1 Mux Input, 1:2 Demux/Fanout
    Outputs
  • Automatic Slew Rate Based on Input Rate Detect
  • On-chip Eye Monitor
  • Low 300 mW Power Consumption With Automatic
    Power Down On Loss Of Input Signal
  • Programmable via SPI, Or SMBus Interface
  • Single 2.5 V Supply Operation
  • Small 4 mm × 4 mm 24-pin QFN Package
  • -40°C to +85°C Operating Temperature Range
  • Footprint compatible with LMH1218 for easy
    upgrade to 12G
  • Supports ST 424(3G), 292(HD), 259(SD), MADI, and
    DVB-ASI
  • Locks to rates 2.97 Gbps, 1.485 Gbps, or Divided
    by 1.001 sub-rates, and DVB-ASI
  • Reference-free Operation with Fast Lock Time
    covering all Supported or Selected Data Rates
  • 75 Ω and 100 Ω Transmitter Outputs
  • Integrated 2:1 Mux Input, 1:2 Demux/Fanout
    Outputs
  • Automatic Slew Rate Based on Input Rate Detect
  • On-chip Eye Monitor
  • Low 300 mW Power Consumption With Automatic
    Power Down On Loss Of Input Signal
  • Programmable via SPI, Or SMBus Interface
  • Single 2.5 V Supply Operation
  • Small 4 mm × 4 mm 24-pin QFN Package
  • -40°C to +85°C Operating Temperature Range
  • Footprint compatible with LMH1218 for easy
    upgrade to 12G

The LMH0318 is a 3 Gbps HD/SD SDI Reclocker with Integrated Cable Driver designed to drive serial video data compatible to SMPTE-SDI and DVB-ASI standards. The clock and data recovery circuit eliminates accumulated jitter and detects the incoming data rate without requiring an external reference clock. The integrated driver with 75 ohm and 50 ohm outputs enables multiple media options such as coax and FR4 PCB.

The integrated 2-to-1 MUX on the input of the LMH0318 enables selection between two video sources, while the programmable equalizer compensates for the PC board loss to extend signal reach. With a wide range clockand- data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to serial data from 270 Mbps to 2.97 Gbps without the need for an external reference clock and loop filter component, thereby simplifying board design and lowering system cost. The reclocked serial data can be routed to either the 75 Ω or 50 Ω transmitter output, or both simultaneously (1-to-2 fanout mode). The output voltage swing is compatible to ST 424, 344, 292, and 259 standards.

A non-disruptive eye monitor allows for real-time measurement of serial data to simplify system startup or field tuning. The LMH0318 is pin compatible with the LMH1218, 12 Gbps Cable Driver with Integrated Reclocker.

The LMH0318 is a 3 Gbps HD/SD SDI Reclocker with Integrated Cable Driver designed to drive serial video data compatible to SMPTE-SDI and DVB-ASI standards. The clock and data recovery circuit eliminates accumulated jitter and detects the incoming data rate without requiring an external reference clock. The integrated driver with 75 ohm and 50 ohm outputs enables multiple media options such as coax and FR4 PCB.

The integrated 2-to-1 MUX on the input of the LMH0318 enables selection between two video sources, while the programmable equalizer compensates for the PC board loss to extend signal reach. With a wide range clockand- data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to serial data from 270 Mbps to 2.97 Gbps without the need for an external reference clock and loop filter component, thereby simplifying board design and lowering system cost. The reclocked serial data can be routed to either the 75 Ω or 50 Ω transmitter output, or both simultaneously (1-to-2 fanout mode). The output voltage swing is compatible to ST 424, 344, 292, and 259 standards.

A non-disruptive eye monitor allows for real-time measurement of serial data to simplify system startup or field tuning. The LMH0318 is pin compatible with the LMH1218, 12 Gbps Cable Driver with Integrated Reclocker.
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More Information

For more information on the LMH0318 programming guide and IBIS-AMI models.  Request Now

Technical documentation

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Type Title Date
* Data sheet LMH0318 3 Gbps HD/SD SDI Reclocker with Integrated Cable Driver datasheet PDF | HTML 10 Sep 2015
EVM User's guide LMH0324-18EVM User Guide (Rev. A) 11 Jun 2018
Technical article Three things to consider when upgrading to 4K Ultra HD 12G-SDI interfaces 13 Apr 2016
User guide LMH0318 Programming Guide 16 Sep 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMH1218EVM — LMH1218 Evaluation Module

The LMH1218EVM evaluation module provides a complete high bandwidth platform to evaluate the SDI/UHD and 10 GbE signal conditioning features of the Texas Instruments LMH1218 UHD Cable Driver with Integrated Reclocker. The LMH1218EVM can be used for standard compliance testing, performance (...)

User guide: PDF
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Simulation model

IBIS-AMI Model Request Form

SNLM143.PDF (25 KB) - IBIS Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Reference designs

TIDA-03028 — 3G-SDI Repeater With Reclocking Function Reference Design

This verified reference design is functionally an SDI repeater/signal conditioning solution for 3G SDI applications. This reference design is compatible with SMPTE ST-424, ST-292, and ST-259 electrical requirements.
Design guide: PDF
Schematic: PDF
Package Pins Download
WQFN (RTW) 24 View options

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