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參數(shù)資料
| 型號： | FMS6400CSX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | Dual Channel Video Drivers with Integrated Filters and Composite Video Summer |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 79K |
| 代理商： | FMS6400CSX |
2004 Fairchild Semiconductor Corporation
FMS6400 Rev. 1A
1
www.fairchildsemi.com
September 2005
F
FMS6400
Dual Channel Video Drivers with Integrated Filters and
Composite Video Summer
Features
■
7.1 MHz 5th order Y,C filters with composite summer
■
Selectable for 0dB or 6dB gain
■
50dB stopband attenuation at 27MHz on Y, C and CV outputs
■
Better than 0.1 dB flatness to 4.5MHz on Y,C and CV outputs
■
No external frequency selection components or clocks
■
< 5ns group delay deviation on Y, C and CV outputs
■
AC-Coupled Inputs
■
AC or DC-Coupled Outputs
■
Capable of PAL frequency selection components or clocks
■
0.3% / 0.2° differential gain/phase on Y,C and CV channels
■
Integrated DC restore circuitry with low tilt
■
Lead (Pb) Free SOIC-8 Package
Applications
■
Cable and Satellite set top boxes
■
DVD players
■
Personal Video Recorders (PVR)
■
Video On Demand (VOD)
Description
The FMS6400 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
pp
, 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 ter-
minated 75
line. This presents a total of 150
of loading to the
part. A dual load would be two of these in parallel which would
present a total of 75
to the part. The gain of the Y, C and CV
signals can be selected for 0dB or 6dB with 1V
pp
input levels. All
video channels are clamped during sync to establish the appro-
priate output voltage reference levels.
The FMS6400 typical cutoff frequency is 7.1MHz. Option for a
lower cutoff frequency of 5MHz is available. Please refer to the
FMS6400-1 datasheet for further information.
Block Diagrams
S
gM
Sync Strip
Reference and
Timing
250mV
1
gM
+
+
250mV
4
8
6
5
2
7
VCC
YIN
CIN
ASEL
COUT
CVOUT
YOUT
0 or
6dB
3
GND
0 or
6dB
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