ML6428CS-2 datasheet(1/11 Pages) MICRO-LINEAR

Teilenummer	ML6428CS-2

Bauteilbeschribung	S-Video Filter and 75廓 Line Drivers with Summed Composite Output

PDF	11 Pages

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Hersteller	MICRO-LINEAR [Micro Linear Corporation]

Direct Link	http://www.microlinear.com

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ML6428

S-Video Filter and 75

W Line Drivers with

Summed Composite Output

1

GENERAL DESCRIPTION

The ML6428 is a dual Y/C 4th-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.

The Y and C input signals from DACs are AC coupled into

the ML6428. Both channels have DC restore circuitry to

clamp the DC input levels during video sync. The Y

channel uses a sync tip clamp. The CV and the C

channels share a feedback clamp.

All outputs must be AC coupled into their loads for the -1

and -3 versions. The -2 and -4 versions are DC coupled.

All inputs (-1, -2, -3 and -4 versions) are AC coupled. The

Y or C outputs can drive 2VP-P into a 150

W load, while

the CV output can drive 2VP-P into 75

W. Thus the CV

output is capable of driving two independent 150

W loads

to 2VP-P.

On the CV output, one of the 75

W loads can be shorted to

ground with no loss of drive to the remaining load. The Y,

C and CV channels have a gain of 2 (6dB) with 1VP-P

input levels.

BLOCK DIAGRAM

FEATURES

s

6.7MHz Y and C filters, with CV out for NTSC or PAL

s

75

W cable line driver for Y, C, CV, and TV modulator

s

43dB stopband attenuation at 27MHz

s

1dB flatness up to 4.8MHz

s

No external frequency select components or clocks

s

12ns group delay flatness up to 10MHz

s

5% overshoot on any input edge

s

AC coupled input and output (ML6428CS-1 and -3)

s

AC coupled input and DC coupled output

(ML6428CS-2 and -4)

s

0.4% differential gain on all channels, 0.4º differential

phase on all channels

s

0.7% total harmonic distortion on all channels

s

5V ±10% operation

s

DC restore with low tilt

BUFFER

TRANSCONDUCTANCE

ERROR AMP

BUFFER

SYNC TIP CLAMP

4th-ORDER

FILTER

4th-ORDER

FILTER

4

1

3

8

6

5

GND

CIN

YIN

YOUT

CVOUT

COUT

VCCO

VCC

7

2

Σ

+

DATASHEET

June, 2000

Ähnliche Beschreibung - ML6428CS-2

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