August 1999
PRELIMINARY
ML6429
75W Quad Video Cable Drivers and Filters
with Switchable Inputs
GENERAL DESCRIPTION
The ML6429 is a quad 4
th
-order Butterworth lowpass
reconstruction filter plus quad video amplifier optimized
for minimum overshoot and flat group delay. Each filter
channel has a two-input multiplexer that switches between
two groups of quad video signals. Applications driving
SCART and EVC cables are supported for composite,
component, and RGB video.
1V
P-P
input signals from DACs are AC coupled into the
ML6429, where they are DC restored. Outputs are AC
coupled, and drive 2V
P-P
into a 150W load. The ML6429
can be used with DC coupled outputs for certain
applications.
A fifth unfiltered channel is provided to support an
additional analog composite video input. A swapping
multiplexer between the two composite channels allows
the distribution amplifiers to output from either input.
Several ML6429s can be arranged in a master-slave
configuration where an external sync can be used for CV
and RGB outputs.
FEATURES
s
Cable drivers for Peritel (SCART), Enhanced Video
Connector (EVC), and standard video connectors, 75W
cable drivers for CV, S-video, and RGB
7.1MHz cutoffs CV, RGB, and S-video, NTSC or PAL
filters with mux inputs and output channel mux
7.1MHz to 8.4MHz cutoffs achievable with peaking
capacitor
Quad 4
th
-order reconstruction or dual anti-aliasing filter
41dB stopband attenuation at 27MHz, 0.5dB flatness
up to 4.5MHz
12ns group delay flatness up to 10MHz
0.4% differential gain, 0.4潞 differential phase on all
channels, 0.4% total harmonic distortion on all channels
2kV ESD guaranteed
Master-slave configuration allows up to 8 multiplexed,
filtered output signals
s
s
s
s
s
s
s
s
BLOCK DIAGRAM
17
2
CVINF/Y1*
REQUIRED
SYNC STRIP
FILTERED CHANNEL
4th-ORDER
FILTER
VCCORGB
+
鈥?/div>
22
VCCOCV
6
VCC
SWAP CVF
14
13
SWAP CVU
SYNCIN
23
SYNCOUT
24
3
4
7
8
9
10
11
12
CVINUA/Y2*
CVINUB/Y3*
RINA/Y4
RINB/Y5
GINA/Y6
GINB/Y7
BINA/C1
BINB/C2
MUX
MUX
MUX
MUX
SYNC
TIMER
TRANSCONDUCTANCE
ERROR AMP
0.5V
SYNC
TIMER
SWAP
MUX
TRANSCONDUCTANCE
ERROR AMP
+
鈥?/div>
脳2
CVOUT1/YOUTA
21
脳2
CVOUT2/YOUTB
20
0.5V
4th-ORDER
FILTER
0.5V
4th-ORDER
FILTER
0.5V
4th-ORDER
FILTER
0.75V
GNDO
19
GND
5
脳2
脳2
脳2
ROUT/YOUTC
18
TRANSCONDUCTANCE
ERROR AMP
+
鈥?/div>
GOUT/YOUTD
16
TRANSCONDUCTANCE
ERROR AMP
+
鈥?/div>
BOUT/COUT
15
TRANSCONDUCTANCE
ERROR AMP
A/B MUX
+
鈥?/div>
1
*CAN ALSO INPUT SYNC ON GREEN SIGNALS
1
ML6429相關(guān)型號(hào)PDF文件下載
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型號(hào)
版本
描述
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