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Triple-Channel HDTV Filters

-50dB Attenuation at 44.25MHz Filter for Complete HD Image Suppression without External Components

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet Triple-Channel HDTV Filters Jan 18, 2007

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Key Features

  • 30MHz Bandwidth at ±1.5dB
  • Extremely Sharp Rolloff, Lowpass Filters -50dB at 44.25MHz
  • DC-Coupled Inputs; AC- or DC-Coupled Outputs
  • ±5V Dual Supply (MAX9501)
  • 5V Single Supply (MAX9500)
  • Matched Group Delay and Gain
  • Drive Single/Double Back-Terminated Loads (150Ω/75Ω) Directly to Ground
  • Sink and Source Output Current
  • High Input Impedance to Interface to Low Output-Current DAC
  • 16-Pin QSOP Package

Applications/Uses

  • A/V Receivers
  • Cable and Satellite Set-Top Box Receivers
  • Digital Displays
  • DVD Players
  • HDTV Sets
  • Home Theater Systems
  • Video Projectors

Description

The MAX9500/MAX9501 are fully integrated solutions for filtering and buffering HDTV signals. The MAX9500 operates from a single +5V supply, while the MAX9501 operates from dual ±5V supplies. The MAX9500/MAX9501 triple-channel video reconstruction filters are both gain and delay matched and are ideal for use in set-top boxes, DVD players, and other equipment that generate analog HDTV outputs.

The MAX9500/MAX9501 interface between the current-output, digital-to-analog converters (DAC) of an Advanced Television Standard Committee (ATSC), Motion Picture Experts Group (MPEG) decoder and the external connections of a television, set-top box, or DVD player.

The MAX9500/MAX9501 feature a DC-coupled input with very low input capacitance and high resistance. The highly selective lowpass filters remove spectral replicas at the output of the DAC. The output amplifier has +6dB of gain to drive 75Ω back-terminated loads to unity gain. The DC-coupled input eliminates problems such as sync crush, droop, and field tilt. The output load can be DC- or AC-coupled, depending on the application.

All three channels in the MAX9500/MAX9501 have the same frequency response with matched group delay and gain. The MAX9500/MAX9501 filter response meets the requirements of the EIA-770.3/SMPTE 274M filter template achieving > 40dB attenuation at 44.25MHz. The MAX9500/MAX9501 can also be used as an antialiasing filter for HDTV component inputs.

The MAX9500/MAX9501 are available in compact 16-pin QSOP packages and are fully specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX9500, MAX9501: Typical Operating Circuit MAX9500, MAX9501: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Triple-Channel HDTV Filters Jan 18, 2007

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .