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PDF ML6427 Data sheet ( Hoja de datos )
| Número de pieza | ML6427 | |
| Descripción | 75 Quad Video Cable Drivers and Filters with Switchable Inputs | |
| Fabricantes | Micro Linear | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ML6427 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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August 1999
PRELIMINARY
ML6427
75W Quad Video Cable Drivers and Filters
with Switchable Inputs
GENERAL DESCRIPTION
The ML6427 is a quad 4th-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.
1VP-P input signals from DACs are AC coupled into the
ML6427 where they are DC restored. Outputs are AC
coupled and drive 2VP-P into a 150W load. The ML6427
can provide 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 ML6427s can be arranged in a master-slave
configuration where an external sync can be used for CV
and RGB outputs.
BLOCK DIAGRAM
FEATURES
s Cable drivers for Peritel (SCART), Enhanced Video
Connector (EVC), and standard video connectors, 75W
cable drivers for CV, S-video, and RGB
s 7.1MHz CV, RGB, and S-video, NTSC or PAL filters
with mux inputs and output channel mux
s Quad reconstruction filter or dual anti-aliasing filter
s 43dB stopband attenuation at 27MHz
s 1dB flatness up to 4.8MHz
s 12ns group delay flatness up to 10MHz
s 0.4% differential gain, 0.4º differential phase on all
channels
s 0.4% total harmonic distortion on all channels
s Master-slave configuration allows up to 8 multiplexed,
filtered output signals
SYNCIN
2
SYNCIN
23
SYNCOUT
24
CVINFA/Y2*
3
CVINFB/Y3*
4
RINA/Y4
7
RINB/Y5
8
GINA/Y6
9
GINB/Y2
10
BINA/C1
11
BINB/C2
12
A/B MUX
1
17
VCCORGB
UNFILTERED CHANNEL
22
VCCOCV
6
VCC
SYNC
TIMER
TRANSCONDUCTANCE
ERROR AMP
+
–
MUX
REQUIRED
SYNC STRIP
SYNC
TIMER
TRANSCONDUCTANCE
ERROR AMP
MUX
TRANSCONDUCTANCE
ERROR AMP
MUX
TRANSCONDUCTANCE
ERROR AMP
MUX
TRANSCONDUCTANCE
ERROR AMP
4th-ORDER
FILTER
+
– 0.5V
4th-ORDER
FILTER
+
– 0.5V
4th-ORDER
FILTER
+
– 0.5V
4th-ORDER
FILTER
+
– 0.75V
*CAN ALSO INPUT SYNC ON GREEN SIGNALS
14
SWAP CVU
13
SWAP CVF
0.5V
SWAP
MUX
CVOUT1/YOUTA
×2 21
CVOUT/YOUTB
×2 20
ROUT/YOUTC
×2 18
GOUT/YOUTD
×2 16
BOUT/COUT
×2 15
GNDO
19
GND
5
1
1 page  
ELECTRICAL CHARACTERISTICS (Continued)
ML6427
SYMBOL
PARAMETER
PSRR PSRR (All Channels)
tpd Group Delay (All Channels)
Dtpd Group Delay Deviation from Flatness
(All Channels)
VIH Input Voltage Logic High
VIL Input Voltage Logic Low
CONDITIONS
MIN TYP MAX UNITS
0.5VP-P (100kHz) at VCC
at 100kHz
–39 dB
60 ns
to 3.58MHz (NTSC)
4 ns
to 4.43MHz (PAL)
7 ns
to 10MHz
12 ns
A/B MUX, SWAP CVU, SWAP CVF 2.5
V
A/B MUX, SWAP CVU, SWAP CVF
1V
Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.
Note 2: Sustained short circuit protection limited to 10 seconds.
5
5 Page 
ML6427
1kΩ
19
GNDO
CVINU/Y1
2
COMPOSITE CV0
VIDEO IN
CVINFA/Y2
3
CVINFB/Y3
4
RINA/Y4
7
1kΩ
RINB/Y5
8
LUMA IN
GINA/Y6
9
GINB/Y7
10
CHROMA IN
BINA/C1
11
BINB/C2
12
5
GND
17 22
VCCORGB VCCOCV
6
VCC
CVOUT1/YOUTA
21
ML6427
MASTER
CVOUT2/YOUTB
20
CVL
ROUT/YOUTC CV+
18 (80dB/DECADE ATTENUATION)
COMPOSITE
VIDEO OUT
GOUT/YOUTD
16
BOUT/COUT
15
LUMA OUT
CHROMA OUT
S-VIDEO
OUT
SYNCIN
23
SYNCOUT
24
A/B MUX
1
SWAP CVF SWAP CVU
13 14
H SYNC OUT
Figure 7a. Composite Loopback (Cascaded Filters) for Additional Attenuation
1kΩ
19
GNDO
COMPOSITE
VIDEO IN
Y0
LUMA IN
1kΩ
CHROMA IN
CVINU/Y1
2
CVINFA/Y2
3
CVINFB/Y3
4
RINA/Y4
7
RINB/Y5
8
GINA/Y6
9
GINB/Y7
10
BINA/C1
11
BINB/C2
12
5
GND
17 22
VCCORGB VCCOCV
6
VCC
CVOUT1/YOUTA
21
ML6427
MASTER
CVOUT2/YOUTB
20
COMPOSITE
VIDEO OUT
ROUT/YOUTC
18
YL
GOUT/YOUTD Y+
16 (80dB/DECADE ATTENUATION)
BOUT/COUT
15
CHROMA OUT
SYNCIN
23
SYNCOUT
24
A/B MUX
1
SWAP CVF SWAP CVU
13 14
S-VIDEO
OUT
H SYNC OUT
Figure 7b. Luma Loopback (Cascaded Filters) for Additional Attenuation
Figure 7. CCIR656 and CCIR601 Application: Composite and Luma Loopback, plus H-Sync out
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ML6427.PDF ] | |
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