ml6429 Fairchild Semiconductor, ml6429 Datasheet

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ml6429

Manufacturer Part Number
ml6429
Description
Quad Video Cable Drivers Filters With Switchable Inputs
Manufacturer
Fairchild Semiconductor
Datasheet

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GENERAL DESCRIPTION
The ML6429 is a quad 4
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
ML6429, where they are DC restored. Outputs are AC
coupled, and drive 2V
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.
BLOCK DIAGRAM
P-P
input signals from DACs are AC coupled into the
23
24
10
11
12
2
3
4
7
8
9
1
CV INF /Y1*
SYNCIN
SYNCOUT
CV INU A/Y2*
CV INU B/Y3*
R IN A/Y4
R IN B/Y5
G IN A/Y6
G IN B/Y7
B IN A/C1
B IN B/C2
A/B MUX
REQUIRED
SYNC STRIP
P-P
MUX
MUX
MUX
MUX
th
into a 150Ω load. The ML6429
-order Butterworth lowpass
*CAN ALSO INPUT SYNC ON GREEN SIGNALS
75Ω Quad Video Cable Drivers and Filters
TIMER
SYNC
TRANSCONDUCTANCE
TRANSCONDUCTANCE
TRANSCONDUCTANCE
TRANSCONDUCTANCE
FILTERED CHANNEL
ERROR AMP
ERROR AMP
ERROR AMP
ERROR AMP
TIMER
SYNC
TRANSCONDUCTANCE
4th-ORDER
ERROR AMP
FILTER
+
+
+
+
0.5V
0.5V
0.5V
0.75V
+
FEATURES
I
I
I
I
I
I
I
I
I
V CCO RGB
Cable drivers for Peritel (SCART), Enhanced Video
Connector (EVC), and standard video connectors, 75Ω
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
41dB stopband attenuation at 27MHz, 0.5dB flatness
up to 4.5MHz
12ns group delay flatness up to 10MHz
0.4% differential gain, 0.4º differential phase on all
channels, 0.4% total harmonic distortion on all channels
Master-slave configuration allows up to 8 multiplexed,
filtered output signals
4th-ORDER
4th-ORDER
4th-ORDER
0.5V
2kV ESD guaranteed
17
FILTER
FILTER
FILTER
with Switchable Inputs
V CCO CV
th
-order reconstruction or dual anti-aliasing filter
22
V CC
GNDO
6
19
SWAP
MUX
SWAP CVF
GND
5
×2
×2
×2
×2
×2
14
CV OUT 1/Y OUT A
CV OUT 2/Y OUT B
G OUT /Y OUT D
R OUT /Y OUT C
13
B OUT /C OUT
SWAP CVU
ML6429
REV. 1.1 2/8/2001
21
20
18
16
15

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ml6429 Summary of contents

Page 1

... SCART and EVC cables are supported for composite, component, and RGB video. 1V input signals from DACs are AC coupled into the P-P ML6429, where they are DC restored. Outputs are AC coupled, and drive 2V into a 150Ω load. The ML6429 P-P can be used with DC coupled outputs for certain applications ...

Page 2

... B/Y3 inputs to provide INU necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at SYNCIN. For RGB applications, the green channel with sync can be used as an input to this pin. (see RGB Applications section) 2 ML6429 24-Pin SOIC (S24) A/B MUX INF / INU A/Y2 ...

Page 3

PIN DESCRIPTION PIN NAME FUNCTION Analog BLUE video output or chroma OUT OUT output from either Analog GREEN video output or luma OUT OUT output from either RGB ...

Page 4

ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied .................................................................................................. Junction Temperature ............................................. 150°C ESD ..................................................................... ...

Page 5

ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER PSRR PSRR (All Channels) t Group Delay (All Channels) pd ∆t Group Delay Deviation from Flatness pd (See Figures 3 and 14) (All Channels) V Input Voltage Logic High IH V Input Voltage Logic Low IL ...

Page 6

... FUNCTIONAL DESCRIPTION The ML6429 is a quad monolithic continuous time analog video filter designed for reconstructing signals from four video D/A sources. The ML6429 is intended for use in AC coupled input and output applications. th The filters approximate a 4 -order Butterworth characteristic with an optimization toward low overshoot and flat group delay ...

Page 7

FREQUENCY (MHz) Figure 1. Passband Flatness (Normalized) All outputs. Passband is ripple-free. Low frequency group delay is 62ns. At 3.58MHz group delay increases by only 4ns. At 4.43MHz group delay increases by ...

Page 8

... B channel can be used as a chroma input. Composite outputs and an H-sync output is also provided. There are several configurations available with the ML6429. Figure 4 includes a list of basic output options for composite, S-video, TV modulator, and RGB outputs. Note that each composite channel can drive a CV load or a channel modulator simultaneously ...

Page 9

... Option outputs + 1 TV modulator output, 1 S-video output Other: Figure 4. Basic Application for NTSC GNDO GND V CCO RGB V CCO CV CV OUT 1/Y OUT A CV OUT 2/Y OUT B ML6429 SYNCOUT A/B MUX SWAP CVU SWAP CVF VIDEO CABLES 220µF 75Ω 220µF 75Ω 220µF 75Ω ...

Page 10

... CV OUT 2/Y OUT B ML6429 SYNCOUT A/B MUX SWAP CVU SWAP CVF SYNC IN V CCO RGB V CCO CV CV OUT 1/Y OUT A CV OUT 2/Y OUT B ML6429SLAVE GND A/B MUX SWAP CVU SWAP CVF COMPOSITE VIDEO OUT 20 LUMA R OUT /Y OUT C OUT 18 G OUT /Y OUT D ...

Page 11

... REV. 1.1 2/8/2001 1kΩ 1kΩ GNDO GND V CCO RGB V CCO CV CV INF /Y1 CV INU A/Y2 CV INU B/ A/ B/Y5 ML6429 B/C2 SYNCIN SYNCOUT A/B MUX SWAP CVU SWAP CVF OUTPUTS OUT OUT Digital Player VCR ...

Page 12

... INPUTS Bank A: RGB, CV filtered path Bank B: RGB, CV filtered path Other: CV unfiltered path, Sync IN (slave mode) 12 UNFILTERED 80ns±10ns DELAY R OSD ML6429 G SCART/QUAD VIDEO FILTER AND DRIVER B FAST BLANKING INTERVAL D OR ALPHA-KEY SIGNAL 13.5MHz/ 27MHz DELAY AT 13.5MHz IS APPROXIMATELY 74ns 22 6 220µF ...

Page 13

Figure 10. NTSC/PAL Video Frequency Response With and Without Peaking Capacitor Figure 11. Stopband Rejection at 27MHz With and Without Peaking Capacitor Figure 12. Group Delay at 5.5MHz (PAL) With and Without Peaking Capacitor REV. 1.1 2/8/2001 ...

Page 14

GND C14 75Ω C15 75Ω C16 75Ω C17 C18 R4 75Ω C19 CIN 1 C20 R5 75Ω JP5 JP2 ...

Page 15

... ORDERING INFORMATION PART NUMBER ML6429CS-1 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; ...

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