4-Channel Video Amplifier with 1-SD and 3-HD 6th-order Filters




  • 1-SDTV Video Filter Support CVBS

  • 3-HDTV Video Filter Support Y'Pb'Pr'-1080i/720p,R'G'B' or VGA/SVGA/XGA

  • Optimized 6th-order Butterworth Video reconstruction filter:
    * CVBS Channel: -3dB at 9MHz
    * HD Channel: -3dB ≥ 36MHz

  • Support Multiple Input Biasing:
    * Provide 80-mV Level-Shift when DC-Coupled
    * Transparent Input Clamping when AC-Coupled
    * Support External DC Biasing when AC-Coupled

  • Very Low Quiescent Current: 31.5 mA(at 3.3V, Typical)

  • 6dB Gain(2V/V), Rail TO Rail Output

  • AC- or DC-Coupled Output Driving Dual Video Loads(75Ω)

  • Wide Power Supply: +3.0V to +5.5V Single Supply

  • Robust ESD Protection:
    * Robust 8kV-HBM and 2kV-CDM ESD Rating

  • Green Product, MSOP-10-EP , TSSOP-14 Package


  • Video Signal Amplification

  • Set-Top Box Video Driver

  • PVR、DVD Player Video Buffer

  • Video Buffer for Portable or USB-Powered Video Devices

  • HDTV


TPF134A is a specially designed for consumer applications,high-performance, low-cost video reconstruction filter, it combine excellent video performance and low power consumption perfectly. It incorporates one standard-definition (CVBS) and three high-definition (HD) filter channels. All filters feature sixth-order Butterworth characteristics that are useful as digital-to-analog converter (DAC) reconstruction filters or as analog-to-digital converter (ADC) anti-aliasing filters. The HD filters can be bypassed to support filters. The HD filters can be bypassed to support 1080p60 video or up to quad extended graphics array (QXGA) RGB video.

As part of the TP134A flexibility, the input can be configured for ac- or dc-coupled inputs. The 84-mV output level shift allows for a full sync dynamic range at the output with 0-V input. The ac-coupled modes include a transparent sync-tip clamp option for composite video (CVBS), Y', and G'B'R' signals. AC- coupled biasing for C'/P'B/P'R channels can easily be achieved by adding an external resistor to VS+.The TP134A rail-to-rail output stage with 6-dB gain allows for both ac and dc line driving. The ability to drive two lines, or 75-Ω loads, allows for maximum flexibility as a video line driver. The 31.5-mA total quiescent current at 3.3 V makes it an excellent choice for power-sensitive video applications.TPF134A is available in MSOP-10 package (TPF134A-VR) and TSSOP-14 package(TPF134A-TR).Its operation temperature range is from -40°C  to +85°C.


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