FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer

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FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer

October 2006

FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer
Features
7.1MHz fifth-order Y,C filters with composite summer 50dB stopband attenuation at 27MHz on Y, C, and CV

Description
The FMS6410B is a dual Y/C fifth-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. 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 75 impedance matching resistor connected to a terminated 75 line. This presents a total of 150 of loading to the part. A dual load is two of these in parallel, which presents a total of 75 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.

outputs Better than 0.1dB flatness to 4.5MHz on Y, C, and CV outputs 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 selection components or clocks 0.3% differential gain with 0.2 differential phase on Y, C, and CV channels Integrated DC restore circuitry with low tilt Lead-free SOIC-8 package

Applications
Cable and satellite set-top boxes DVD players Personal Video Recorders (PVR) Video On Demand (VOD)

Block Diagrams
VCC 7 Sync Strip Reference and Timing

YIN

1

6dB

8

YOUT

gM
250mV

6

CVOUT

gM
250mV

CIN

4

6dB

5

COUT

3 GND

Figure 1. Block Diagram

2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2

www.fairchildsemi.com

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FMS6410B DATASHEET