ML6426CS-4 Micro Linear, ML6426CS-4 Datasheet

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ML6426CS-4

Manufacturer Part Number
ML6426CS-4
Description
High bandwidth triple video filter with buffered outputs for RGB or YUV
Manufacturer
Micro Linear
Datasheet
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, 36MHz, and
48MHz. Each channel contains a 4
lowpass reconstruction video filter. The filter is optimized
for minimum overshoot and flat group delay and
guaranteed differential gain and phase at the outputs 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
feedback 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
have a gain of 2 (6dB) at 1V
BLOCK DIAGRAM
Filter A
Filter B
Filter C
High Bandwidth Triple Video Filters with Buffered
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
P-P
ML6426-1
6.7MHz
6.7MHz
6.7MHz
into a 150
P-P
input levels.
MUX
MUX
MUX
th
load. All channels
-order Butterworth
ML6426-2
TRANSCONDUCTANCE
TRANSCONDUCTANCE
TRANSCONDUCTANCE
12MHz
12MHz
12MHz
ERROR AMP
ERROR AMP
ERROR AMP
DISABLE
15
ML6426-3
24MHz
24MHz
24MHz
+
+
+
V CCO
FEATURES
12
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 for 6.7, 12, 24, 30,
36, and 48MHz to handle various line rates
Multiple ML6426 outputs can be paralleled to drive
RGB/YUV outputs at different frequencies for various
line rates by means of Disable/Enable pin.
6dB drivers and sync tip clamps for DC restore
DC restore with minimal tilt
0.4% differential gain on all channels
0.4º differential phase on all channels
0.8% total harmonic distortion on all channels
2kV ESD protection
0.5V
0.5V
0.5V
Outputs for RGB or YUV
V CC
ML6426-4
4
30MHz
30MHz
30MHz
4th-ORDER
4th-ORDER
4th-ORDER
FILTER A
FILTER B
FILTER C
GNDO
14
ML6426-5
36MHz
36MHz
36MHz
GND
2
2
2
3
G OUT /U OUT
B OUT /V OUT
R OUT /Y OUT
ML6426
13
11
10
September 1999
ML6426-6
48MHz
48MHz
48MHz
PRELIMINARY
1

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ML6426CS-4 Summary of contents

Page 1

High Bandwidth Triple Video Filters with Buffered 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, 36MHz, ...

Page 2

ML6426 PIN CONFIGURATION PIN DESCRIPTION PIN NAME FUNCTION 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 IN ...

Page 3

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 4

ML6426 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER 6.7MHZ FILTER: ML6426-1 (continued) T Group Delay ( Group Delay Deviation from Flatness PD (R, G, B,) 2MHz FILTER: ML6426-2 f –1dB Bandwidth Flatness (R, G, B,) 1dB f –3dB Bandwidth ...

Page 5

ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER 30MHz FILTER: ML6426-4 (Continued) X Crosstalk TALK X A/B MUX Crosstalk TALK T Group Delay ( Group Delay Deviation from Flatness PD (R, G, B,) 36MHz FILTER: ML6426-5 f –1dB Bandwidth Flatness ...

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

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 displayed, and its refresh rate. The actual refresh rate of the ...

Page 8

... I/O or other logic to perform the proper reconstruction filtering for the resolution of choice. This configuration allows for a minimum of bill of materials and reduces cost. Micro Linears ML6426 EVAL Kit demonstrates multi-resolution designs. Furthermore, since the ML6426 pin-out is identical for all the options, the filters can be interchanged ...

Page 9

GENERAL SELECT DISABLE/ENABLE LINES PURPOSE I/O LOGIC 5V 0.1µ 0.1µ 0.1µ SYNC IN Figure 3. ATSC Digital Television Application November, 1999 220µ ...

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 10 GRAPHIC PROCESSOR HDTV DECODER D/A AND DISPLAY PROCESSOR ...

Page 11

GND GND 0.1µ B 0.1µ 0.1µ 0.1µ 0.1µ 0.1µ A ...

Page 12

... Figure 9. Passband Flatness all Outputs –10 –20 –30 –40 –50 –60 –70 Figure 11. Passband Flatness all Outputs (Normalized) 30 MHz, ML6426CS-4 10 –10 –20 –30 –40 –50 –60 –70 100M 1G Figure 13. Passband Flatness all Outputs (Normalized) 48MHz, ML6426CS-6 November, 1999 ...

Page 13

... FREQUENCY (MHz) ML6426CS –2 –4 –6 – FREQUENCY (MHz) All Outputs ML6426CS –2 –4 –6 – FREQUENCY (MHz) All Outputs ML6426CS-2 100 10 100 ...

Page 14

... FREQUENCY (MHz) ML6426CS –2 –4 –6 – FREQUENCY (MHz) All Outputs ML6426CS –2 –4 –6 – FREQUENCY (MHz) All Outputs ML6426CS-4 100 40 100 ...

Page 15

... FREQUENCY (MHz) ML6426CS –2 –4 –6 – FREQUENCY (MHz) All Outputs ML6426CS –2 –4 –6 – FREQUENCY (MHz) All Outputs ML6426CS-6 120 50 100 ...

Page 16

ML6426 PHYSICAL DIMENSIONS 16 1 0.017 - 0.027 (0.43 - 0.69) (4 PLACES) 0.012 - 0.020 0.055 - 0.061 (1.40 - 1.55) 16 Package: S16N 16-Pin Narrow SOIC 0.386 - 0.396 (9.80 - 10.06) 0.148 - 0.158 0.228 - 0.244 ...

Page 17

... ORDERING INFORMATION PART NUMBER ML6426CS-1 ML6426CS-2 ML6426CS-3 ML6426CS-4 ML6426CS-5 ML6426CS-6 ML6426CS-15 © Micro Linear 2000 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; ...

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