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FMS6406
Precision S-Video Filter with Summed Composite Output, Sound Trap and Group Delay Compensation

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Contents

General Description
Features
Applications
Product Status/Pricing/Packaging
Order Samples
Application Notes
Qualification Support

General Description

The FMS6406 is a dual Y/C 5th-order Butterworth lowpass video filter optimized for minimum overshoot and flat group delay. The device also contains a summing circuit to generate filtered composite video, an audio trap and group delay compensation circuit. The audio trap removes video information in the spectral location of the subsequent RF audio carrier. The group delay circuit predistorts the signal to compensate for the inherent receiver IF filter’s group delay distortion.

In a typical application, the Y and C input signals from DACs are AC-coupled into the filters. Both channels have DC-restore circuitry to clamp the DC-input levels during video sync. The Y and C channels use separate feedback clamps. The clamp pulse is derived from the Y channel.

All outputs are capable of driving 2Vpp, AC or DC-coupled, into either a single or dual video load. A single video load consists of a series 75ohm impedance matching resistor connected to a terminated 75ohm line, this presents a total of 150ohm of loading to the part. A dual load would be two of these in parallel which would present a total of 75ohm to the part. The gain of the Y, C and CV signals is 6dB with 1Vpp input levels. All video channels are clamped during sync to establish the appropriate output voltage reference levels.

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Features

  • 7.6MHz 5th order Y, C filters with composite summer
  • 14dB notch at 4.425MHz to 4.6MHz for sound trap capable of handling stereo
  • 50dB stopband attenuation at 27MHz on Y, C and CV outputs
  • Better than 0.5dB flatness to 4.2MHz on Y, C and CV outputs
  • Equalizer and notch filter for driving RF modulator with group delay of -180ns
  • No external frequency selection components or clocks
  • < 5ns group delay on Y, C and CV outputs
  • AC coupled inputs
  • AC or DC coupled outputs
  • Capable of PAL frequency for Y, C, CV
  • Continuous Time Low Pass Filters
  • <1.4% differential gain with 0.7° differential phase on Y, C and CV channels
  • Integrated DC restore circuitry with low tilt

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Applications

  • Cable set-top boxes
  • Satellite set-top boxes
  • DVD players

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Product Status/Pricing/Packaging      buy now

ProductProduct statusEco StatusPricing*Package typeLeadsPacking methodPackage DrawingPackage Marking Convention**
FMS6406CSLifetime BuyRoHS CompliantN/ASOIC8RAIL PDFLine 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: 6406 Line 3: CS
FMS6406CSXFull ProductionRoHS Compliant$1.69SOIC8TAPE REEL PDFLine 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: 6406 Line 3: CS
* Fairchild 1,000 piece Budgetary Pricing
** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Package marking information for product FMS6406 is available. Click here for more information .

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Application Notes

AN-6024: AN-6024 FMS6xxx Product Series Understanding Analog Video Signal Clamps,Bias,DC-Restore, and AC or DC Coupling Methods (116 K) Nov 13, 2009
AN-6028: AN-6028 FMS6406 Evaluation Board Application Note (63 K) Nov 13, 2009
AN-6041: AN-6041 PCB Layout Considerations for Video Filter / Drivers (60 K) Nov 13, 2009
 

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Qualification Support

Click on a product for detailed qualification data

Product
FMS6406CS
FMS6406CSX

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