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Triple-Channel Video Reconstruction Filter and Buffer for Composite and Y/C Outputs

Low-Cost, Triple-Channel Video Reconstruction Filters and Buffers for S-Video and CVBS Video Signals

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Triple-Channel Filter and Buffer for CVBS and Y/C (S-Video)
  • Filter Response Ideal for NTSC, PAL, and Interlaced SDTV Signals
  • 41dB (typ) Stopband Attenuation at 27MHz
  • -0.3dB (typ) Passband Response
  • Low Blanking Level Voltage Allows DC-Coupled Output
  • Each Channel Drives Two 150Ω Video Loads
  • +5V Single-Supply Voltage
  • Tiny 8-Pin Thin QFN or 8-Pin SO Packages

Applications/Uses

  • Digital VCRs
  • Every Composite, S-Video Output for NTSC/PAL, SDTV
  • Game Consoles
  • Security Cameras/Digital Cameras
  • Set-Top Boxes/HDR/DVD

Description

The MAX7443/MAX7444 are low-cost, triple-channel video reconstruction filters for S-video and CVBS video signals. These devices are ideal for anti-aliasing and DAC smoothing video applications such as set-top boxes, DVD players, hard-disk recorders (HDRs), and personal video recorders. These filters operate from a single +5V supply. They are optimized for NTSC, PAL, and standard-definition digital TV (SDTV) video systems.

Each channel consists of a lowpass filter and an adjustable-gain output buffer capable of driving two standard 150Ω video loads. The output buffers can drive either an AC or a DC load such that the blanking level voltage after the backmatch resistor is less than 1V. The Y and C video inputs are summed to produce the composite video output. The MAX7444 offers high-frequency boost to improve picture sharpness. The MAX7443 has a maximum flat-frequency response.

The MAX7443/MAX7444 are available in a tiny 8-pin thin QFN and an 8-pin SO package with exposed pad, and are fully specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX7443, MAX7444: Functional Diagram MAX7443, MAX7444: Functional Diagram Zoom icon

Technical Docs

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 .