FMS6143 — Low-Cost Three-Channel 4th-Order Standard Definition Video Filter Driver
March 2008
FMS6143
Low-Cost Three-Channel 4th-Order
Standard Definition Video Filter Driver
Features
■
Three 4th-order 8MHz (SD)
fi
lters
■
Drives single, AC- or DC-coupled, video loads (2V
pp
, 150Ω)
■
Drives dual, AC- or DC-coupled, video loads (2V
pp
, 75Ω)
■
Transparent input clamping
■
AC- or DC-coupled inputs
■
AC- or DC-coupled outputs
■
DC-coupled outputs eliminate AC-coupling capacitors
■
5V only
■
Robust 8kV ESD protection
■
Lead-free SOIC-8 package
Description
The FMS6143 Low-Cost Video Filter (LCVF) is intended
to replace passive LC
fi
lters and drivers with a low-cost
integrated device. Three 4th-order
fi
lters provide improved
image quality compared to typical 2nd or 3rd-order
passive solutions.
The FMS6143 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) or
dual (75Ω) loads. DC-coupling the outputs removes the
need for output coupling capacitors. The input DC-levels
are offset approximately +280mV at the output (see the
Applications
section for details).
Applications
■
Cable set-top boxes
■
Satellite set-top boxes
■
DVD players
■
HDTV
■
Personal Video Recorders (PVR)
■
Video On Demand (VOD)
Related Application Notes
AN-8002 — FMS6418B 4:2:2 Application Note
AN-6024 — FMS6xxx Product Series Understanding
Analog Video Signal Clamps, Bias, DC-
Restore, and AC or DC Coupling Methods
AN-6041 — PCB Layout Considerations for Video
Filter / Drivers
Functional Block Diagram
IN1
Transparent Clamp
6d
B
OUT1
IN2
Transparent Clamp
6d
B
OUT2
IN3
Transparent Clamp
6d
B
OUT3
8MHz, 4th-order
Figure 1. AC-Coupled Inputs and Outputs
Ordering Information
Part Number
FMS6143CS
FMS6143CSX
Package
SOIC-8
SOIC-8
Pb-Free
Yes
Yes
Operating
Temperture Range
-40 to +85°C
-40 to +85°C
Packaging
Method
Tube
Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
www.fairchildsemi.com
FMS6143 — Low-Cost Three-Channel 4th-Order Standard Definition Video Filter Driver
Pin Configuration
IN1
IN2
IN3
1
2
3
4
8
OUT1
OUT2
OUT3
GND
FMS6143
8-pin
SOIC
7
6
5
V
CC
Figure 2. AC-Coupled Inputs and Outputs
Pin Assignments
Pin #
1
2
3
4
5
6
7
8
Name
IN1
IN2
IN3
V
CC
GND
OUT3
OUT2
OUT1
Type
Input
Input
Input
Input
Output
Output
Output
Output
Video input, Channel 1
Video input, Channel 2
Video input, Channel 3
+5V supply, do not
fl
oat
Description
Must be tied to ground, do not
fl
oat
Filtered output, Channel 3
Filtered output, Channel 2
Filtered output, Channel 1
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
www.fairchildsemi.com
2
FMS6143 — Low-Cost Three-Channel 4th-Order Standard Definition Video Filter Driver
Absolute Maximum Ratings
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The
device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are
not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions
for actual device operation.
Symbol
V
CC
DC Supply Voltage
Parameter
Analog and Digital I/O
Output Channel - Any One Channel (Do Not Exceed)
Min.
-0.3
-0.3
Max.
6.0
V
CC
+ 0.3
50
Unit
V
V
mA
Note:
1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if
operating conditions are not exceeded.
Reliability Information
Symbols
T
J
T
STG
T
L
θ
JA
Parameter
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10s)
Thermal Resistance, JEDEC Standard Multi-layer
Test Boards, Still Air
Min.
-65
Typ.
Max.
150
+150
+300
Unit
°C
°C
°C
°C/W
115
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended ope-
rating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recom-
mend exceeding them or designing to absolute maximum ratings.
Symbols
T
A
V
CC
V
CC
Range
Parameter
Operating Temperature Range
Min.
-40
4.75
Typ.
5.00
Max.
+85
5.25
Unit
°C
V
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
www.fairchildsemi.com
3
FMS6143 — Low-Cost Three-Channel 4th-Order Standard Definition Video Filter Driver
DC Electrical Characteristics
T
A
= 25°C, V
CC
= 5V, R
SOURCE
= 37.5Ω; all inputs are AC-coupled with 0.1μF; all outputs are AC-coupled with 220μF into
150Ω loads; unless otherwise noted.
Symbol
I
CC
V
IN
PSRR
Parameter
Supply Current
(1)
Video Input Voltage Range
Power Supply Rejection
Conditions
FMS6143 (No Load)
Referenced to GND if DC-coupled
DC (All Channels)
Min. Typ. Max. Units
19
1.4
-50
27
mA
Vpp
dB
AC Electrical Characteristics
T
A
= 25°C, V
IN
= 1Vpp, V
CC
= 5V, R
SOURCE
= 37.5Ω; all inputs are AC-coupled with 0.1μF; all outputs are AC-coupled with
220μF into 150Ω loads; unless otherwise noted.
Symbol
AV
f
1dB
fc
f
SB
DG
DP
THD
X
TALK
SNR
t
pd
Parameter
Channel Gain
(1)
-1dB Bandwidth
(1)
-3dB Bandwidth
Attenuation (Stopband Reject)
Differential Gain
Differential Phase
Output Distortion (All Channels)
Crosstalk (Channel-to-Channel)
Signal-to-Noise Ratio
Propagation Delay
Conditions
All Channels
All Channels
All Channels
All Channels at f = 27MHz
All Channels
All Channels
V
OUT
= 1.8V
pp
, 1MHz
at 1MHz
All Channels, NTC-7 Weighting:
100kHz to 4.2MHz
Delay from Input-to-Output, 4.5MHz
Min. Typ. Max. Units
6.0
5.6
6.2
6.5
7.7
48
0.3
0.6
0.4
-60
75
59
6.4
dB
MHz
MHz
dB
%
°
%
dB
dB
ns
Note:
1. 100% tested at 25°C.
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
www.fairchildsemi.com
4
FMS6143 — Low-Cost Three-Channel 4th-Order Standard Definition Video Filter Driver
Typical Performance Characteristics
T
A
= 25°C, V
CC
= 5V, R
SOURCE
= 37.5Ω; all inputs AC-coupled with 0.1μF; all outputs are AC-coupled with 220μF into 150Ω
loads; unless otherwise noted.
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-60
2
1
30
20
10
1
Normalized Gain (dB)
Delay (ns)
0
-10
-20
-30
-40
-50
-60
Mkr Frequency
Ref
400kHz
1
2
3
6.53MHz
7.72MHz
27MHz
Gain
6dB
-1dB BW
-3dB BW
-47.13dB
3
1 = 8.2MHz (12.63ns)
400kHz
5
10
15
20
25
30
400kHz
5
10
15
20
25
30
Frequency (MHz)
Frequency (MHz)
Figure 3. Frequency Response
-60
-70
-80
Figure 4. Group Delay vs. Frequency
0.2
NTSC
Differential Gain (%)
0.1
0
-0.1
-0.2
-0.3
Noise (dB)
-90
-100
-110
-120
-130
400kHz
1
2
3
4
5
6
Min = -0.20
Max = 0.13
ppMax = 0.33
1st
2nd
3rd
4th
5th
6th
Frequency (MHz)
Figure 5. Noise vs. Frequency
Figure 6. Differential Gain
1.0
Differential Phase (deg)
0.8
0.6
0.4
0.2
0
-0.2
-0.4
NTSC
Min = 0.00
Max = 0.59
ppMax = 0.59
1st
2nd
3rd
4th
5th
6th
Figure 7. Differential Phase
© 2006 Fairchild Semiconductor Corporation
FMS6143 Rev. 4.0.7
www.fairchildsemi.com
5
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