FMS6400-1 Datasheet

IC型號：
FMS6400-1
PDF描述：
Dual Channel Video Drivers with Integrated Filters and Compo...
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FMS6400-1 Dual Channel Video Drivers with Integrated Filters and Composite Video Summer

June 2005

FMS6400-1

Dual Channel Video Drivers with Integrated Filters and

Composite Video Summer

Features

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5.0 MHz 5th order Y,C filters with composite summer

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Selectable for 0dB or 6dB gain

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50dB stopband attenuation at 27MHz on Y, C and CV outputs

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No external frequency selection components or clocks

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AC-Coupled Inputs

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AC or DC-Coupled Outputs

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Continuous time low pass filters

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0.4% / 0.4擄 differential gain/phase on Y,C and CV channels

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Integrated DC restore circuitry with low tilt

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Lead (Pb) Free SOIC-8 Package

Description

The FMS6400-1 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. 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 feed-

back clamps. The clamp pulse is derived from the Y channel.

All outputs are capable of driving 2V

, AC or DC coupled, into

either a single or dual video load. A single video load consists of

a series 75鈩?impedance matching resistor connected to a ter-

minated 75鈩?line. This presents a total of 150鈩?of loading to the

part. A dual load would be two of these in parallel which would

present a total of 75鈩?to the part. The gain of the Y, C and CV

signals can be selected for 0dB or 6dB with 1V

input levels. All

video channels are clamped during sync to establish the appro-

priate output voltage reference levels.

Applications

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Cable and Satellite set top boxes

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DVD players

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Personal Video Recorders (PVR)

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Video On Demand (VOD)

Block Diagrams

VCC

Sync Strip

Reference and

Timing

0 or

6dB

YIN

YOUT

250mV

CVOUT

250mV

CIN

0 or

6dB

COUT

GND

ASEL

漏2004 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FMS6400-1 Rev. 1A

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