SNLS285H April   2008  – May 2016 LMH0303

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics - DC
    6. 6.6 Electrical Characteristics - AC
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Loss-of-Signal Detector
      2. 7.3.2 Input Interfacing
      3. 7.3.3 Output Interfacing
      4. 7.3.4 Output Slew Rate Control
      5. 7.3.5 Cable Fault Detection
      6. 7.3.6 SMBus Interface
        1. 7.3.6.1 Transfer of Data through the SMBus
        2. 7.3.6.2 SMBus Transactions
          1. 7.3.6.2.1 Writing a Register
          2. 7.3.6.2.2 Reading a Register
        3. 7.3.6.3 Communicating With Multiple LMH0303 Cable Drivers through the SMBus
    4. 7.4 Device Functional Modes
    5. 7.5 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 General Guidance for All Applications
      2. 8.1.2 Cable Fault Detection Operation
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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1 Features

  • Supports ST 424 (3G), 292 (HD), and 259 (SD)
  • Data Rates up to 2.97 Gbps
  • Supports DVB-ASI at 270 Mbps
  • Cable Detect on Output
  • Loss of Signal Detect at Input
  • Output Driver Power-Down Control
  • Typical Power Consumption: 130 mW in SD Mode and 155 mW in HD Mode
  • Typical Power Consumption of the Power-Save Mode: 4 mW
  • Single 3.3-V Supply Operation
  • 75-Ω Single-Ended Outputs
  • 100-Ω Differential Input
  • Selectable Slew Rate
  • Industrial Temperature Range: −40°C to 85°C
  • 16-Pin WQFN Package
  • Footprint Compatible With the LMH0302

2 Applications

  • ST 424, ST 292, ST 344, and ST 259 Serial Digital Interfaces
  • Digital Video Routers and Switches
  • Distribution Amplifiers

3 Description

The LMH0303 device is designed for use in ST 424, ST 292, ST 344, and ST 259 serial digital video applications. The LMH0303 drives 75-Ω transmission lines (Belden 1694A, Belden 8281, or equivalent) at data rates up to 2.97 Gbps.

The LMH0303 includes intelligent sensing capabilities to improve system diagnostics. The cable detect feature senses near-end termination to determine if a cable is correctly attached to the output BNC. Input loss of signal (LOS) detects the presence of a valid signal at the input of the cable driver. These sensing features may be used to alert the user of a system fault and activate a deep power-save mode, reducing the power consumption of the cable driver to 4 mW. These features are accessible through an SMBus interface.

The LMH0303 provides two selectable slew rates for ST 259 and ST 424 or 292. The output amplitude is adjustable ±10% in 5-mV steps through the SMBus.

The LMH0303 is powered from a single 3.3-V supply. Power consumption is typically 130 mW in SD mode and 155 mW in HD mode. The LMH0303 is available in a 16-pin WQFN package.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMH0303 WQFN (16) 4.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic

LMH0303 30043203.gif