ML6426 High Bandwidth Triple Video Filters with Buffered Outputs for RGB or YUV
ML6426
High Bandwidth Triple Video Filters with Buffered
Outputs for RGB or YUV
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, 15MHz, 24MHz, 30MHz, 36MHz,
and 48MHz. Each channel contains a 4
th
-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 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
P-P
into a 150
load. All channels
have a gain of 2 (6dB) at 1V
P-P
input levels.
FEATURES
I
5V 10% operation
I
RGB/YUV filters for ATSC Digital Television VESA
Standard
I
2:1 Mux Inputs for multiple RGB/YUV inputs
I
Triple Reconstruction Filter options for 6.7, 12, 15, 24,
30, 36, and 48MHz to handle various line rates
I
Multiple ML6426 outputs can be paralleled to drive
RGB/YUV outputs at different frequencies for various
line rates by means of Disable/Enable pin.
I
6dB drivers and sync tip clamps for DC restore
I
DC restore with minimal tilt
I
0.4% differential gain on all channels
0.4 differential phase on all channels
0.8% total harmonic distortion on all channels
I
2kV ESD protection
BLOCK DIAGRAM
RINA/YINA
2
RINB/YINB
BINA/VINA
8
BINB/VINB
9
A/B MUX
GINA/UINA
6
GIN/UINB
7
ROUT/YOUT
13
GOUT/UOUT
11
BOUT/VOUT
10
4th-ORDER
FILTER A
4th-ORDER
FILTER B
4th-ORDER
FILTER C
MUX
MUX
MUX
2
2
2
TRANSCONDUCTANCE
ERROR AMP
TRANSCONDUCTANCE
ERROR AMP
TRANSCONDUCTANCE
ERROR AMP
1
SYNCIN
16
GNDO
14
DISABLE
15
VCCO
12
VCC
4
GND
3
5
+
+
+
0.5V
0.5V
0.5V
ML6426-1
ML6426-2
ML6426-3
ML6426-4
ML6426-5
ML6426-6
ML6426-15
Filter A
6.7MHz
12MHz
24MHz
30MHz
36MHz
48MHz
15MHz
Filter B
6.7MHz
12MHz
24MHz
30MHz
36MHz
48MHz
15MHz
Filter C
6.7MHz
12MHz
24MHz
30MHz
36MHz
48MHz
15MHz
REV. 1.1 2/8/2001
ML6426
2
REV. 1.1 2/8/2001
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.
2
R
IN
A/Y
IN
A
Unfiltered analog R- or Y-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
3
GND
Analog ground
4
V
CC
Analog 5V supply
5
R
IN
B/Y
IN
B
Unfiltered analog R- or Y-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
6
G
IN
A/U
IN
A Unfiltered analog G- or U-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
7
G
IN
B/U
IN
B Unfiltered analog G- or U-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
PIN
NAME
FUNCTION
8
B
IN
A/V
IN
A Unfiltered analog B- or V-channel
input for Bank <A>. Sync must be
provided at SYNC IN pin.
9
B
IN
B/V
IN
B
Unfiltered analog B- or V-channel
input for Bank <B>. Sync must be
provided at SYNC IN pin.
10
B
OUT
Analog B or V-channel output
11
G
OUT
Analog G or U-channel output
12
V
CCO
5V power supply for output buffers
13
R
OUT
Analog R or Y-channel output
14
GNDO
Analog ground
15
DISABLE
Disable/Enable pin. Turns the chip off
when logic high. Internally pulled low.
16
SYNC IN
Input for an external H-sync logic
signal for filter channels. CMOS
level input. Active High.
ML6426
16-Pin Narrow SOIC (S16N)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TOP VIEW
A/B MUX
RINA/YINA
GND
VCC
RINB/YINB
GINA/UINA
GINB/UINB
BINA/VINA
SYNC IN
DISABLE
GNDO
ROUT/YOUT
VCCO
GOUT/UOUT
BOUT/VOUT
BINB/VINB
ML6426
REV. 1.1 2/8/2001
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.
V
CC ................................................................................
0.3V to 7V
Junction Temperature .............................................. 150C
ESD ..................................................................... >2000V
Analog and Digital I/O........... GND 0.3V to V
CC
+ 0.3V
Storage Temperature Range ..................... 65C to 150C
Lead Temperature (Soldering, 10 sec) ..................... 260C
Thermal Resistance (
JA
) .................................... 100C/W
OPERATING CONDITIONS
Temperature Range ....................................... 0C to 70C
V
CC
Range ...................................................4.5V to 5.5V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
CC
= 5V10%, T
A
= Operating Temperature Range (Note 1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL
I
CC
Supply Current
No Load (V
CC
=5.5V)
52
80
mA
A
V
Low Frequency Gain (R, G, B)
V
IN
= 100mV
P-P
at 100KHz
5.34
6.0
6.65
dB
V
OUT
Output Level during Sync (R, G, B,)
DURING SYNC
0.7
0.9
1.1
V
Output Capability
RL = 150W, AC-coupled@1MHz
2
VP-P
t
CLAMP
Clamp Response Time
Settled to Within 10mV, C
IN
= 0.1F
10
ms
V
I
Input Signal Dynamic Range (R, G, B,)
AC Coupled
1.4
V
P-P
OS
Peak Overshoot (R, G, B,)
2V
P-P
Output Pulse
4.3
%
C
L
Output Load Capacitance (R, G, B,)
All Outputs
35
pF
Output Load Drive Capability, per Pin
One Load is 150
2
loads
(YUV or RGB Outputs)
dG
Differential Gain (R, G, B,)
All Outputs at f
C
/2
0.4
%
d
Differential Phase (R, G, B,)
All Outputs at f
C
/2
0.4
T
HD
Output Distortion (R, G, B,)
V
OUT
= 2V
P-P
at 1 MHz
0.8
%
PSRR
PSRR (R, G, B,)
0.5V
P-P
(100kHz) at V
CC
35
dB
I
SC
Output Short Circuit Current (R, G, B,)
Note 2
120
mA
V
IH
Input Voltage Logic High
DISABLE, SYNC IN
2.5
V
V
IL
Input Voltage Logic Low
DISABLE, SYNC IN
1.0
V
T
MUX
Input Mux
A/B Mux
2
s
Data Valid
Pin Valid
Time
High or Low
6.7MHz FILTER: ML6426-1
f
1dB
1dB Bandwidth Flatness (R, G, B,)
25C
4.0
4.8
MHz
f
c
3dB Bandwidth Flatness (R, G, B,)
25C
6.0
6.7
7.3
MHz
f
0.8fc
0.8 x f
C
Attenuation
1.5
dB
f
SB
StopBand Rejection (All Channels
4 f
C
)
f
IN
4 f
C
, Note 3
38
42
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mV
RMS
X
TALK
Crosstalk
Input of 0.5V
P-P
at 1 MHz
55
dB
Between any two Channels
X
TALK
A/B MUX Crosstalk
Input of 0.5V
P-P
at 3.58/4.43MHz
54
dB
ML6426
4
REV. 1.1 2/8/2001
ELECTRICAL CHARACTERISTICS
(Continued)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
6.7MHZ FILTER: ML6426-1 (continued)
T
PD
Group Delay (R, G, B,)
100kHz
70
ns
T
PD
Group Delay Deviation from Flatness
to 3.58MHz
4.0
ns
(R, G, B,)
to 4.43MHz
8.0
ns
to 10MHz
9
ns
2MHz FILTER: ML6426-2
f
1dB
1dB Bandwidth Flatness (R, G, B,)
25C
7.8
9.2
MHz
f
c
3dB Bandwidth Flatness (R, G, B,)
25C
10.8
12
13.2
MHz
f
0.8fc
0.8 x f
C
Attenuation
1.2
dB
f
SB
StopBand Rejection (All Channels
4 f
C
)
f
IN
4 f
C
, Note 3
40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1
mV
RMS
X
TALK
Crosstalk
Input of 0.5V
P-P
at 1 MHz
55
dB
Between any two Channels
X
TALK
A/B MUX Crosstalk
Input of 0.5V
P-P
at 3.58/4.43MHz
54
dB
T
PD
Group Delay (R, G, B,)
100kHz
40
ns
T
PD
Group Delay Deviation from Flatness
to 3.58MHz
1
ns
(R, G, B,)
to 4.43MHz
1
ns
to 10MHz
7
ns
24MHz FILTER: ML6426-3
f
1dB
1dB Bandwidth Flatness (R, G, B,)
25C
13.6
16
MHz
f
c
3dB Bandwidth Flatness (R, G, B,)
25C
21.6
24
26.4
MHz
f
0.8fc
0.8 x f
C
Attenuation
1.7
dB
f
SB
StopBand Rejection (All Channels
4 f
C
)
f
IN
4 f
C
, Note 3
40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mV
RMS
X
TALK
Crosstalk
Input of 0.5V
P-P
at 1 MHz
55
dB
Between any two Channels
X
TALK
A/B MUX Crosstalk
Input of 0.5V
P-P
at 3.58/4.43MHz
-54
dB
T
PD
Group Delay (R, G, B,)
100kHz
22
ns
T
PD
Group Delay Deviation from Flatness
to 3.58MHz
1
ns
(R, G, B,)
to 4.43MHz
1
ns
to 10MHz
2
ns
30MHz FILTER: ML6426-4
f
1dB
1dB Bandwidth Flatness (R, G, B,)
25C
15.3
18
MHz
f
c
3dB Bandwidth Flatness (R, G, B,)
25C
27
30
33
MHz
f
0.8fc
0.8 x f
C
Attenuation
1.7
dB
f
SB
StopBand Rejection (All Channels
4 f
C
)
f
IN
4 f
C
, Note 3
40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mV
RMS
ML6426
REV. 1.1 2/8/2001
5
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.
Note 3. 38dB is based on tester noise limits.
ELECTRICAL CHARACTERISTICS
(Continued)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
30MHz FILTER: ML6426-4 (Continued)
X
TALK
Crosstalk
Input of 0.5V
P-P
at 1 MHz
55
dB
Between any two Channels
X
TALK
A/B MUX Crosstalk
Input of 0.5V
P-P
at 3.58/4.43MHz
-54
dB
T
PD
Group Delay (R, G, B,)
100kHz
18
ns
T
PD
Group Delay Deviation from Flatness
to 10MHz
0.5
ns
(R, G, B,)
to 27MHz
2
ns
36MHz FILTER: ML6426-5
f
1dB
1dB Bandwidth Flatness (R, G, B,)
25C
17
20
MHz
f
c
3dB Bandwidth Flatness (R, G, B,)
25C
32.4
36
39.6
MHz
f
0.8fc
0.8 x f
C
Attenuation
2
dB
f
SB
StopBand Rejection (All Channels
4 f
C
)
f
IN
4 f
C
, Note 3
40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mV
RMS
X
TALK
Crosstalk
Input of 0.5V
P-P
at 1 MHz
55
dB
Between any two Channels
X
TALK
A/B MUX Crosstalk
Input of 0.5V
P-P
at 3.58/4.43MHz
54
dB
T
PD
Group Delay (R, G, B,)
100kHz
17
ns
T
PD
Group Delay Deviation from Flatness
to 10MHz
0.5
ns
(R, G, B,)
to 30MHz
4
ns
48MHz FILTER: ML6426-6
f
1dB
1dB Bandwidth Flatness (R, G, B,)
25C
25.5
30
MHz
f
c
3dB Bandwidth Flatness (R, G, B,)
25C
43.2
48
52.8
MHz
f
0.8fc
0.8 x f
C
Attenuation
1.2
dB
f
SB
StopBand Rejection (All Channels
4 f
C
)
f
IN
4 f
C
, Note 3
40
dB
NOISE
Output Noise (R, G, B,)
Fullband
1.0
mV
RMS
X
TALK
Crosstalk
Input of 0.5V
P-P
at 1 MHz
55
dB
Between any two Channels
X
TALK
A/B MUX Crosstalk
Input of 0.5V
P-P
at 3.58/4.43MHz
54
dB
T
PD
Group Delay (R, G, B,)
100kHz
16
ns
T
PD
Group Delay Deviation from Flatness
to 10MHz
0.5
ns
(R, G, B,)
to 40MHz
2
ns
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