ML6426CS-4 Fairchild Semiconductor, ML6426CS-4 Datasheet

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ML6426CS-4

Manufacturer Part Number
ML6426CS-4
Description
Manufacturer
Fairchild Semiconductor
Datasheet
Features
• 5V ±10% operation
• RGB/YUV filters for ATSC Digital Television VESA
• 2:1 Mux Inputs for multiple RGB/YUV inputs
• Triple Reconstruction Filter options for 6.7, 12, 24, 30,
• Multiple ML6426 outputs can be paralleled to drive RGB/
• 6dB drivers and sync tip clamps for DC restore
• DC restore with minimal tilt
• 0.4% differential gain on all channels
• 2kV ESD protection
Block Diagram
ML6426
High Bandwidth Triple Video Filters with Buffered
Outputs for RGB or YUV
Standard
and 36MHz to handle various line rates
YUV outputs at different frequencies for various line rates
by means of Disable/Enable pin.
0.4º differential phase on all channels
0.8% total harmonic distortion on all channels
Filter A
Filter B
Filter C
16
2
5
6
7
8
9
1
R IN A/Y IN A
R IN B/Y IN B
G IN A/U IN A
G IN /U IN B
B IN A/V IN A
B IN B/V IN B
A/B MUX
SYNCIN
ML6426-1
6.7MHz
6.7MHz
6.7MHz
MUX
MUX
MUX
TRANSCONDUCTANCE
TRANSCONDUCTANCE
TRANSCONDUCTANCE
ML6426-2
12MHz
12MHz
12MHz
ERROR AMP
ERROR AMP
ERROR AMP
DISABLE
15
ML6426-3
24MHz
24MHz
24MHz
+
+
+
General Description
The ML6426 are a family of triple video filters with buffered
outputs. There are several versions of the ML6426, each with
different passband cut-off frequencies of 6.7MHz, 12MHz,
24MHz, 30MHz, and 36MHz. Each channel contains a 4
order Butterworth lowpass reconstruction video filter. The
filter is optimized for minimum overshoot and flat group
delay and guaranteed differential gain and phase at the out-
puts of the integrated cable drivers.
All input signals from DACs are AC coupled into the
ML6426. All channels have DC restore circuitry to clamp the
DC input levels during video H-sync, using an output feed-
back clamp. An external H-sync signal is required for this
purpose.
All outputs must be AC coupled into their loads. Each output
can drive 2V
2 (6dB) at 1V
V CCO
12
0.5V
0.5V
0.5V
ML6426-4
V CC
30MHz
30MHz
30MHz
P-P
4
P-P
4th-ORDER
4th-ORDER
4th-ORDER
FILTER C
FILTER A
FILTER B
into a 150 Ω load. All channels have a gain of
input levels.
GNDO
ML6426-5
14
www.fairchildsemi.com
36MHz
36MHz
36MHz
×2
×2
×2
GND
3
G OUT /U OUT
R OUT /Y OUT
B OUT /V OUT
REV. 3A August 2004
ML6426-15
15MHz
15MHz
15MHz
13
11
10
th
-

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ML6426CS-4 Summary of contents

Page 1

ML6426 High Bandwidth Triple Video Filters with Buffered Outputs for RGB or YUV Features • 5V ±10% operation • RGB/YUV filters for ATSC Digital Television VESA Standard • 2:1 Mux Inputs for multiple RGB/YUV inputs • Triple Reconstruction Filter options ...

Page 2

ML6426 Pin Configuration Pin Description PIN NAME 1 A/B MUX Logic input pin to select between Bank <A> and Bank <B> video inputs . This pin is internally pulled high A/Y A Unfiltered analog R- or Y-channel input ...

Page 3

DATA SHEET 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. Parameter V CC Junction Temperature ESD Analog ...

Page 4

ML6426 Electrical Characteristics Unless otherwise specified 5V±10 Symbol Parameter 6.7MHz Filter: ML6426-1 f –1dB Bandwidth Flatness (R, G, B,) 1dB f –3dB Bandwidth Flatness ( Attenuation 0.8fc C f ...

Page 5

DATA SHEET Electrical Characteristics Unless otherwise specified 5V±10 Symbol Parameter 30MHz Filter: ML6426-4 f –1dB Bandwidth Flatness (R, G, B,) 1dB f –3dB Bandwidth Flatness ( Attenuation 0.8fc C ...

Page 6

ML6426 Functional Description The ML6426 is a triple monolithic continuous time video filter designed for reconstructing video signals from an YUV/RGB video D/A source. The ML6426 is intended for use in AC coupled input and output applications. The filters approximate ...

Page 7

DATA SHEET Typical Applications Reconstruction filter selection for HDTV and VGA signal filtering The filtering requirements for HDTV and VGA standards vary depending on the resolution of the image to be dis- played, and its refresh rate. The actual refresh ...

Page 8

ML6426 Pixel clock rates for the output D/A converters can be roughly determined from the Table 1. Don’t forget that the deflection system of a CRT display needs retrace time for the vertical and horizontal. This retrace time can vary ...

Page 9

DATA SHEET GENERAL SELECT PURPOSE I/O LOGIC 5V 0.1µ 0.1µ 0.1µ SYNC IN REV. 3A August 2004 DISABLE/ENABLE LINES ML6426-1 7 ...

Page 10

ML6426 FROM SAT MPEG2 OR CABLE TRANSPORT AND DECODER Figure 4. Digital TV Receiver or HDTV Decoder Box FROM CAMERA CV VCR S-VIDEO ANALOG Figure 5. PC Graphics/Frame Grabber Editing Card Figure 6. PC MRI, XRAY, Ultrasound, CT Scan 10 ...

Page 11

DATA SHEET 5V GND GND 75Ω B 75Ω A 75Ω B 75Ω A 75Ω ...

Page 12

... Figure 9. Passband Flatness all Outputs –10 –20 –30 –40 –50 –60 –70 100M Figure 11. Passband Flatness all Outputs 100M 1G DATA SHEET 0 10k 100k 1M 10M 100M FREQUENCY (Hz) (Normalized) 12 MHz, ML6426CS 10M 100M FREQUENCY (MHz) (Normalized) 30 MHz, ML6426CS-4 REV. 3A August 2004 1G ...

Page 13

... Figure 16. Frequency Response All Outputs –2 –4 –6 – Figure 18. Group Delay Deviation All Band, ML6426 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0 FREQUENCY (MHz) All Outputs ML6426CS 100 FREQUENCY (MHz) ML6426CS 100 FREQUENCY (MHz) All Outputs ML6426CS-2 13 ...

Page 14

... All Outputs ML6426CS –2 –4 –6 –8 – FREQUENCY (MHz) Figure 23. Group Delay Deviation of Passband, All Outputs ML6426CS –2 –4 –6 –8 – 100 Figure 20. Group Delay Deviation of Passband, 0 –10 –20 – ...

Page 15

... FREQUENCY (MHz) Figure 27. Group Delay Deviation All band, All Outputs ML6426CS-5 REV. 3A August 2004 –2 –4 –6 – 100 Figure 26. Group Delay Deviation of Passband 100 FREQUENCY (MHz) All Outputs ML6426CS-5 ML6426 50 15 ...

Page 16

ML6426 Mechanical Dimensions 16 PIN 0.017 - 0.027 (0.43 - 0.69) (4 PLACE S ) 0.012 - 0.020 0.055 - 0.061 (0.30 - 0.51) (1.40 - 1.55) 16 Package: S16N 16-Pin Narrow SOIC 0.386 - 0.396 (9.80 ...

Page 17

... ML6426CS2 ML6426 ML6426CS2X ML6426 ML6426CS3 ML6426 ML6426CS3X ML6426 ML6426CS4 ML6426 ML6426CS4X ML6426 ML6426CS4X_NL ML6426 ML6426CS5 ML6426 ML6426CS5X ML6426 ML6426CS15 ML6426 ML6426CS15X Temperature range for all parts: 0°C to +70°C 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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