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FMS6410
Dual Channel Video Drivers with Integrated Filters and Composite Video Summer
Video Features
Dual integrated video low pass reconstruction filters on outputs Composite Video Summer Integrated output drivers provide low impedance outputs and deliver 2VP-P (6dB gain) video into 150. 7.1MHz 4th order video filters 7.1MHz Y and C filters, with CV out 42dB stopband attenuation at 27MHz on Y, C, and CV Better than 1dB flatness to 4.5 MHz on Y, C, and CV No external frequency select components or clocks 9ns group delay flatness on Y, C, and CV output AC coupled inputs and outputs 0.4% differential gain with 0.4 differential phase Integrated DC Restore / Clamp circuitry with low tilt

General Description
The FMS6410 Dual Channel Video Filter Driver Chip with CV Summer offers comprehensive video filtering for set top box or DVD applications. This part consists of two 4th order Butterworth 7.1MHz low pass filters for video signals. The filters are optimized for low overshoot and flat group delay. The device also contains a summing circuit to generate filtered composite video. Integrated video drivers are included to facilitate a direct drive to the outside world. In a typical application, the Y and C input signals from DACs are AC coupled into the filter. Both channels have DC restore circuitry to clamp the DC input levels during video sync. The Y and C channels use a separate feedback clamp. The clamp pulse is derived from the Y channel. The outputs are AC coupled. The Y, C and, CV outputs are buffered to drive 2VP-P into a 150 load (1VP-P into a doubly terminated 75 coax load) with up to 35pF of load capacitance at the output pin. The Y, C, and CV channels have a gain of approximately 2 (6dB) with 1VP-P in
put levels. There is an option for the video output to be DC coupled which limits the drive output to one output on each channel.

Applications
CCTV Cable and Satellite Set top boxes DVD players Televisions Personal Video Recorders (PVRs) Video On Demand (VOD) Distribution Amplifiers

Functional Block Diagram
SYNC STRIP, REF, AND TIMING 6dB

1

YIN

YOUT 8

gM

2

1V

DNC (Do Not Connect)

VCC VIDEO

7

FMS6410
3 GND VIDEO CVOUT 6

gM 1V

4

CIN

6dB

COUT 5

REV. 2a February 2004

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FMS6410 DATASHEET