SNLS233O April   2007  – July 2015 LMH0344

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configurations 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 DC Electrical Characteristics
    6. 6.6 AC Electrical Characteristics
    7. 6.7 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 Block Description
      2. 7.3.2 Mute Reference (MuteREF)
      3. 7.3.3 Carrier Detect (CD) and Mute
      4. 7.3.4 Input Interfacing
      5. 7.3.5 Output Interfacing
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Dos and Don'ts
  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 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Compliant With ST 424, ST 292, ST 344, and ST 259(8)
  • Supports DVB-ASI at 270 Mbps
  • Wide Range of Data Rates: 125 Mbps to 2.97 Gbps
  • Equalizes up to 120 Meters of Belden 1694A at 2.97 Gbps, up to 140 Meters of Belden 1694A at 1.485 Gbps, or up to 400 Meters of Belden 1694A at 270 Mbps
  • Equalizes up to 120m of Belden 1694A at 2.97 Gbps With 0.3 UI Maximum Output Jitter
  • Manual Bypass and Output Mute With a Programmable Threshold
  • Single-Ended or Differential Input
  • 50-Ω Differential Outputs (Internal 50-Ω Pullups)
  • Single 3.3-V Supply Operation
  • 280-mW Typical Power Consumption
  • 16-Pin WQFN or 25-Ball CS-BGA Package
  • Industrial Temperature Range: −40°C to +85°C
  • HBM ESD Rating: 8 kV
  • WQFN Version Footprint Compatible With the LMH0044, LMH0384, and LMH0074
  • Replaces the Semtech GS2974A or GS2974B

2 Applications

  • ST 424, ST 292, ST 344, and ST 259 Serial Digital Interfaces(8)
  • Serial Digital Data Equalization and Reception
  • Data Recovery Equalization

3 Description

The LMH0344 3-Gbps HD – SD SDI Adaptive Cable Equalizer is designed to equalize data transmitted over cable (or any media with similar dispersive loss characteristics). The equalizer operates over a wide range of data rates from 125 Mbps to 2.97 Gbps and supports ST 424, ST 292, ST 344, and ST 259.

The LMH0344 device implements DC restoration to correctly handle pathological data conditions. The equalizer may be driven in either a single-ended or differential configuration.

Additional features include separate carrier detect and output mute pins which may be tied together to mute the output when no signal is present. A programmable mute reference is provided to mute the output at a selectable level of signal degradation.

For applications using the 4:4:4:4 10 bits video format, the LMH0394 cable equalizer will provide better performance.

The device is available in two space–saving packages: a 4-mm × 4-mm 16-pin WQFN and even more space-efficient 3-mm × 3-mm 25-ball CS-BGA package.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMH0344 WQFN (16) 4.00 mm × 4.00 mm
CS-BGA (25) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Block Diagram

LMH0344 20199002.gif