FMS6363 — Low-Cost, Three-Channel, 6th-Order, High-Definition Video Filter Driver
March 2008
FMS6363 — Low-Cost, Three-Channel,
6th-Order, High-Definition, Video Filter Driver
Features
Three Sixth-order 30MHz (HD) Filters
Transparent Input Clamping
Single Video Drive Load (2V
pp
, 150Ω
= 6δβ)
AC or DC-coupled Inputs
AC or DC-coupled Outputs
DC-coupled Outputs Eliminate AC-coupling
Capacitors
5V Only
Robust 8kV ESD Protection
Package SOIC-8
Description
The FMS6363 low-cost video filter (LCVF) is intended to
replace passive LC filters and drivers with a low-cost
integrated device. Three sixth
-
order filters provide
improved image quality compared to typical lower-order
passive solutions.
The FMS6363 may be directly driven by a DC-coupled
DAC output or an AC-coupled signal. Internal diode
clamps and bias circuitry may be used if AC-coupled
inputs are required
(see Applications section for details).
The outputs can drive AC-or DC-coupled single (150Ω)
loads. DC-coupling the outputs removes the need for
output coupling capacitors. The input DC levels are offset
approximately +280mV at the output
(see Applications
section for details).
Applications
Cable and Satellite Set-top Boxes
DVD Players
HDTV
Personal Video Recorders (PVR)
Video On Demand (VOD)
Block Diagram
IN1
Transparent Clamp
6d
B
OUT1
IN2
Transparent Clamp
6d
B
OUT2
IN3
Transparent Clamp
6d
B
OUT3
30MHz, 6
th
order
Figure 1. Block Diagram
Ordering Information
Part Number
FMS6363CS
FMS6363CSX
Operating
Temperature Range
0 to 70°C
0 to 70°C
Package
8-Lead, Small Outline Integrated Circuit (SOIC)
8-Lead, Small Outline Integrated Circuit (SOIC)
Packing
Method
Rail
Reel
Quantity
95
2500
All packages are lead free per JEDEC: J-STD-020B standard.
© 2005 Fairchild Semiconductor Corporation
FMS6363 • Rev. 1.0.3
www.fairchildsemi.com
FMS6363 — Low-Cost, Three-Channel,6th-Order, High-Definition, Video Filter Driver
Pin Configuration
IN1
IN2
IN3
Pin Definitions
Pin # Name
Type
Input
Input
Input
Input
Input
Output
Output
Output
Description
Video input, channel 1
Video input, channel 2
Video input, channel 3
+5V Supply
Ground
Filtered output, channel 3
Filtered output, channel 2
Filtered output, channel 1
1
2
3
4
8
7
6
5
OUT1
OUT2
1
2
3
4
5
6
7
8
IN1
IN2
IN3
V
CC
GND
OUT3
OUT2
OUT1
OUT3
GND
V
CC
Figure 2. 8-Pin SOIC
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
V
CC
V
IO
I
OUT
ESD
DC Supply Voltage
Analog Digital I/O
Parameter
Min.
-0.3
-0.3
Max.
6.0
V
CC
+ 0.3
50
8
Unit
V
V
mA
kV
Output Current, Any One Channel, Do Not Exceed
Human Body Model, JESD22-A114
Reliability Information
Symbol
T
J
T
STG
T
L
JA
Parameter
Junction Temperature
Storage Temperature Range
Lead Temperature, Soldering 10 Seconds
Thermal Resistance, JEDEC Standard, Multi-layer
Test Board, Still Air
Min.
-65
Typ.
Max.
+150
+150
+300
Unit
°C
°C
°C
°C/W
112.7
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
T
A
V
CC
R
SOURCE
Parameter
Operating Temperature Range
Supply Voltage Range
Input Source Resistance
Min.
0
4.75
Typ.
5.00
Max.
70
5.25
300
Unit
°C
V
Ω
www.fairchildsemi.com
© 2005 Fairchild Semiconductor Corporation
FMS6363 • Rev. 1.0.3
2
FMS6363 — Low-Cost, Three-Channel,6th-Order, High-Definition, Video Filter Driver
DC Electrical Characteristics
T
A
=25°C, V
CC
=5V, R
SOURCE
=37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into150Ω loads,
referenced to 400kHz; unless otherwise noted.
Symbol
I
CC
V
IN
Parameter
Supply Current
(1)
Video Input Voltage Range
No Load
Conditions
Referenced to GND, if DC-coupled
Min.
Typ.
22
1.4
Max.
30
Units
mA
V
PP
Note:
1. 100% tested at 25°C.
AC Electrical Characteristics
T
A
=25°C, V
IN
=1V
PP
, V
CC
=5V, R
SOURCE
=37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF
into150Ω loads, referenced to 400kHz; unless otherwise noted.
Symbol
AV
f
1dB
f
C
f
SB1
f
SB2
f
SB3
THD1
THD2
THD3
X
TALK
SNR1
SNR2
t
pd
Parameter
Channel Gain
(2)
-1dB Bandwidth
-3dB Bandwidth
Attenuation, Stopband Reject
(2)
Conditions
All Channels
All Channels
All Channels
All Channels at f=37.125MHz
All Channels at f=44.25MHz
All Channels at f=74.25MHz
(2)
V
OUT
=1.4V
PP
, 10MHz
Min.
5.8
23
30
Typ.
6.0
30
33
6.5
14.5
Max.
6.2
Units
dB
MHz
MHz
dB
32
36
0.2
0.4
1.2
-60
65
20
dB
dB
ns
%
Output Distortion, All Channels
Crosstalk Channel-to-Channel
Signal-to-Noise Ratio,
All Channels
(4)
Propagation Delay
(3)
V
OUT
=1.4V
PP
, 15MHz
V
OUT
=1.4V
PP
, 22MHz
At 1MHz
Unweighed; 30MHz lowpass,
100KHz to 30HKz
Delay from input to output
Notes:
2. 100% tested at 25°C.
3. 1.4V
PP
active video.
4. SNR=20 • log (714mV/rms noise).
© 2005 Fairchild Semiconductor Corporation
FMS6363 • Rev. 1.0.3
www.fairchildsemi.com
3
FMS6363 — Low-Cost, Three-Channel,6th-Order, High-Definition, Video Filter Driver
Typical Performance Characteristics
T
A
=25°C, V
CC
=5V, R
SOURCE
=37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into150Ω loads,
referenced to 400kHz; unless otherwise noted.
12
6
0
-6
1
2
Mkr Frequency
Ref 400kHz
1
2
3
28.847MHz
33.11MHz
74.25MHz
Gain
6dB
-1dB BW
-3dB BW
-38.11dB
15
10
5
1
-12
-18
-24
-30
-36
-42
-48
400kH 20
40
60
Delay (ns)
Gain (dB)
0
-5
-10
3
-15
1 = 32MHz (10.32ns)
80
100
120
140
-20
400kH 10
20
30
40
50
60
70
80
90
Frequency (MHz)
Frequency (MHz)
Figure 3. Frequency Response
Figure 4. Group Delay vs. Frequency
-20
-30
-40
PSRR (dB)
-50
-60
-70
-80
-90
0.1
1
Frequency (MHz)
10
30
PSRR (dB)
-30
Using 0.1μF and 0.01μF •
Bypass Capacitors as suggested
-40
-50
-60
-70
-80
-90
0.1
1
Frequency (MHz)
10
30
Figure 5. PSRR vs. Frequency; No Bypass Caps
Figure 6. PSRR vs. Frequency; Bypass Caps
2
SYNC Tip Compression (mV)
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
25 50 75 100 125 150 175 200 225 250 275 300
Figure 7. SYNC Tip Compression vs. R
SOURCE
© 2005 Fairchild Semiconductor Corporation
FMS6363 • Rev. 1.0.3
www.fairchildsemi.com
4
FMS6363 — Low-Cost, Three-Channel,6th-Order, High-Definition, Video Filter Driver
Applications Information
Functional Description
The FMS6363 Low-Cost Video Filter (LCVF) provides
6dB gain from input to output. In addition, the input is
slightly offset to optimize the output driver performance.
The offset is held to the minimum required value to
decrease the standing DC current into the load. Typical
voltage levels are shown in Figure 8.
1.02V
0.65 V
YIN
Driver
YOUT
800kΩ
0.32V
0.02V
2.28V
V
IN
Driven by:
DC-Coupled DAC Outputs o r
AC-Coupled and Clamped
Y, R, G, B, CV
V
OUT
Figure 9. Input Clamp Circuit
I/O Configurations
For DC-coupled DAC drive with DC-coupled outputs,
use the configuration in Figure 10.
0.88V
0.28V
There will be a 280mV offset from the DC input level to
the DC output level.
Vout = 2 * Vin + 280mV
0V - 1.4V
0.85V
0.5V
0.15V
V
IN
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Inactive
75Ω
Figure 10. DC-coupled Inputs and Outputs
1.98V
1.28V
0.58V
V
OUT
Driven by:
DC-Coupled DAC Outputs
AC-Coupled and Biased
U, V, Pb, Pr, C
Alternatively, if the DAC’s average DC output level
causes the signal to exceed the range of 0V to 1.4V, it
can be AC-coupled, as shown in Figure 11.
0V - 1.4V
Figure 8. Typical Voltage Levels
The FMS6363 provides an internal diode clamp to
support AC coupled input signals. If the input signal
does not go below ground, the input clamp does not
operate. This allows DAC outputs to directly drive the
FMS6363 without an AC coupling capacitor. The worst-
case sync tip compression due to the clamp does not
exceed 7mV. The input level set by the clamp,
combined with the internal DC offset, keeps the output
within its acceptable range. When the input is AC-
coupled, the diode clamp sets the sync tip (or lowest
voltage) just below ground.
For symmetric signals like C, U, V, Cb, Cr, Pb and Pr;
the average DC bias is fairly constant and the inputs can
be AC-coupled with the addition of a pull-up resistor to
set the DC input voltage. DAC outputs can also drive
these same signals without the AC coupling capacitor. A
conceptual illustration of the input clamp circuit is shown
in Figure 9.
DVD or
STB
SoC
DAC
Output
0.1µ
LCVF
Clamp
Active
75Ω
Figure 11. AC-coupled Inputs, DC-coupled Outputs
When the FMS6363 is driven by an unknown external
source or a SCART with its own clamping circuitry the
inputs should be AC-coupled, shown in Figure 12.
0V - 1.4V
0.1µ
External Video
source must
be AC-coupled.
75Ω
LCVF
Clamp
Active
75Ω
Figure 12. SCART with DC-coupled Outputs
© 2005 Fairchild Semiconductor Corporation
FMS6363 • Rev. 1.0.3
www.fairchildsemi.com
5
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