FMS6146 — Low-Cost Six-Channel 4th-Order Standard Definition Video Filter Driver
February 2008
FMS6146
Low-Cost Six-Channel 4th-Order
Standard Definition Video Filter Driver
Features
■
Six 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 TSSOP-14 package
Description
The FMS6146 Low-Cost Video Filter (LCVF) is intended
to replace passive LC
fi
lters and drivers with a low-cost
integrated device. Six 4th-order
fi
lters provide improved
image quality compared to typical 2nd or 3rd-order
passive solutions.
The FMS6146 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
Applications
section for details).
Applications
■
Cable set-top boxes
■
Satellite set-top boxes
■
DVD players
■
HDTV
■
Personal Video Recorders (PVR)
■
Video On Demand (VOD)
Functional Block Diagram
IN1
Transparent Clamp
6d
B
OUT1
IN2
Transparent Clamp
6d
B
OUT2
IN3
Transparent Clamp
6d
B
OUT3
IN4
Transparent Clamp
6d
B
OUT4
IN5
Transparent Clamp
6d
B
OUT5
IN6
Transparent Clamp
6d
B
OUT6
8MHz, 4th order
Ordering Information
Part Number
FMS6146MTC14
FMS6146MTC14X
Package
TSSOP-14
TSSOP-14
Operating Temperture Range
-40°C to +85°C
-40°C to +85°C
Packaging Method
Tube
Tape and Reel
www.fairchildsemi.com
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Fairchild Semiconductor Corporation
FMS6146 Rev. 1.0.9
FMS6146 — Low-Cost Six-Channel 4th-Order Standard Definition Video Filter Driver
Pin Configuration
IN1
IN2
IN3
1
2
3
4
5
6
7
14
OUT1
OUT2
FMS6146
14-pin
TSSOP
13
12
11
10
9
8
OUT3
GND
V
CC
IN4
IN5
IN6
OUT4
OUT5
OUT6
Pin Assignments
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin Name
IN1
IN2
IN3
V
CC
IN4
IN5
IN6
OUT6
OUT5
OUT4
GND
OUT3
OUT2
OUT1
Type
Input
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
Output
Output
Video input, Channel 1
Video input, Channel 2
Video input, Channel 3
+5V supply, do not
fl
oat
Video input, Channel 4
Video input, Channel 5
Video input, Channel 6
Filtered video output, Channel 6
Filtered video output, Channel 5
Filtered video output, Channel 4
Description
Must be tied to ground, do not
fl
oat
Filtered video output, Channel 3
Filtered video output, Channel 2
Filtered video output, Channel 1
© 2006 Fairchild Semiconductor Corporation
FMS6146 Rev. 1.0.9
www.fairchildsemi.com
2
FMS6146 — Low-Cost Six-Channel 4th-Order Standard Definition Video Filter Driver
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.
Parameter
DC Supply Voltage
Analog and Digital I/O
Output Channel - Any One Channel (Do Not Exceed)
Min.
-0.3
-0.3
Max.
6
V
CC
+ 0.3
50
Unit
V
V
mA
Reliability Information
Symbol
T
J
T
STG
T
L
Θ
JA
Parameter
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 seconds)
Thermal Resistance, JEDEC Standard
Multi-layer Test Boards, Still Air
Min.
-65
Typ.
Max.
+150
+150
+300
Unit
°C
°C
°C
°C/W
90
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.
Parameter
Operating Temperature Range
V
CC
Range
Min.
-40
+4.75
Typ.
+5.0
Max.
+85
+5.25
Unit
°C
V
© 2006 Fairchild Semiconductor Corporation
FMS6146 Rev. 1.0.9
www.fairchildsemi.com
3
FMS6146 — Low-Cost Six-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
FMS6146 (No Load)
Referenced to GND if DC coupled
DC (All Channels)
Min. Typ. Max. Units
35
1.4
-50
55
mA
Vpp
dB
Note:
1. 100% tested at 25°C.
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
f
c
f
SB
dG
dφ
THD
X
TALK
SNR
tpd
Parameter
Channel Gain
(1)
-1dB Bandwidth
(1)
-3dB Bandwidth
Attenuation (Stopband Reject)
Differential Gain
Differential Phase
Conditions
All Channels
All Channels
All Channels
All Channels at f = 27MHz
All Channels
All Channels
Min. Typ. Max. Units
6.0
4.5
6.2
6.8
7.8
48
0.3
0.6
0.4
-60
75
59
6.4
dB
MHz
MHz
dB
%
°
%
dB
dB
ns
Output Distortion (All Channels) V
OUT
= 1.8Vpp, 1MHz
Crosstalk (Channel-to-Channel) at 1MHz
Signal-to-Noise Ratio
Propagation Delay
All Channels
NTC-7 Weighting: 100kHz to 4.2MHz
Delay from Input-to-Output, 4.5MHz
Note:
1. 100% tested at 25°C.
© 2006 Fairchild Semiconductor Corporation
FMS6146 Rev. 1.0.9
www.fairchildsemi.com
4
FMS6146 — Low-Cost Six-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
Mkr
-35
Ref
-40
1
-45
2
-50
3
-55
400kHz
2
1
40
30
20
1
Normalized Gain (dB)
Delay (ns)
10
0
-10
-20
-30
-40
Frequency
400kHz
6.83MHz
7.84MHz
27MHz
Gain
6dB
-1dB BW
-3dB BW
-47.57dB
3
1 = 8.2MHz (16.02ns)
5
10
15
20
25
30
-50
400kHz
5
10
15
20
25
30
Frequency (MHz)
Frequency (MHz)
Figure 1. Frequency Response
-60
-70
Figure 2. Group Delay vs. Frequency
0.2
0.1
NTSC
Differential Gain (%)
-80
0
-0.1
-0.2
-0.3
-0.4
-0.5
Min = -0.24
Max = 0.02
ppMax = 0.26
Noise (dB)
-90
-100
-110
-120
-130
400kHz
1
2
3
4
5
6
1st
2nd
3rd
4th
5th
6th
Frequency (MHz)
Figure 3. Noise vs. Frequency
1.0
Figure 4. Differential Gain
NTSC
Differential Phase (deg)
0.8
0.6
0.4
0.2
0
-0.2
-0.4
1st
2nd
3rd
4th
5th
6th
Min = 0.00
Max = 0.64
ppMax = 0.64
Figure 5. Differential Phase
© 2006 Fairchild Semiconductor Corporation
FMS6146 Rev. 1.0.9
www.fairchildsemi.com
5
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