Fairchild FMS6346 Six channel, 6th order sd/hd video filter driver Datasheet

FMS6346
Six Channel, 6th Order SD/HD Video Filter Driver
Features
Description
■
■
■
■
■
■
■
■
■
■
■
The FMS6346 Low Cost Video Filter (LCVF) is intended to
replace passive LC filters and drivers with a low-cost integrated
device. Six 6th order Butterworth filters provide improved image
quality compared to typical passive solutions. The combination
of low power Standard Definition (SD) and High Definition (HD)
filters greatly simplify DVD video output circuitry. Three channels
offer fixed SD filters while the other three are selectable
between SD and HD filters.
Three selectable sixth-order 8/32MHz (SD/HD) filters
Three fixed sixth-order 8MHz (SD) filters
Transparent input clamping
Single video load drive (2Vpp, 150Ω, AV = 6dB)
AC or DC-coupled inputs
AC or DC-coupled outputs
DC-coupled outputs eliminate AC-coupling capacitors
Low power
5V only
Robust (12kV HBM) output ESD protection
Lead (Pb) free packages - TSSOP-20
The FMS6346 offers a fixed gain of 6dB. A metal option is available
that provides a fixed gain of 9dB, offering even more flexibility.
The FMS6346 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).
Applications
■
■
■
■
■
The outputs can drive AC or DC-coupled single (150Ω) video
loads. DC-coupling the outputs removes the need for output
coupling capacitors. The input DC levels will be offset approximately +280mV at the output.
Cable and satellite set-top boxes
DVD players
HDTV
Personal Video Recorders (PVR)
Video On Demand (VOD)
Block Diagram
SD IN1
Transparent Clamp
6dB
SD OUT1
SD IN2
Transparent Clamp
6dB
SD OUT2
SD IN3
Transparent Clamp
6dB
SD OUT3
8MHz, 6th order
SD/HD IN1
Transparent Clamp
6dB
SD/HD OUT1
SD/HD IN2
Transparent Clamp
6dB
SD/HD OUT2
SD/HD IN3
Transparent Clamp
6dB
SD/HD OUT3
SD/HD
FMS6346 Rev. 1B
Selectable
8/32MHz
6th order
1
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
March 2006
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Pin Assignments
Pin Configuration
Pin
#
Pin
Type
1
SD IN1
Input
SD video input, channel 1
SD OUT3
2
SD IN2
Input
SD video input, channel 2
3
SD IN3
Input
SD video input, channel 3
SD IN1
1
20
SD OUT1
SD IN2
2
19
SD OUT2
SD IN3
3
18
FMS6346
20L TSSOP
N/C
4
17
GND
VCC
5
16
GND
FcSEL
6
15
N/C
SD/HD IN1
7
14
SD/HD OUT1
SD/HD IN2
8
13
SD/HD OUT2
SD/HD IN3
9
12
SD/HD OUT3
N/C
10
11
N/C
4
N/C
Input
No Connect
5
VCC
Input
+5V supply
6
FcSEL
Input
Selects filter corner frequency for pins 7, 8, and
9. “0” = SD, “1” = HD
7
SD/HD IN1
Input
Selectable SD or HD video input, channel 1
8
SD/HD IN2
Input
Selectable SD or HD video input, channel 2
9
SD/HD IN3
Input
Selectable SD or HD video input, channel 3
10
N/C
Input
No Connect
N/C
Input
No Connect
11
Factory Programming Options
Part
Name
FMS6346
Part
Number
FMS6346MTC20
FMS6346-9 FMS6346MTC209
Description
12
SD/HD OUT3 Output Filtered SD or HD video output, channel 3
13
SD/HD OUT2 Output Filtered SD or HD video output, channel 2
14
SD/HD OUT1 Output Filtered SD or HD video output, channel 1
15
N/C
Input
No Connect
16
GND
Input
Must be tied to Ground
Input
Must be tied to Ground
Gain
Option
17
GND
18
SD OUT3
Output Filtered SD video output, channel 3
6dB
19
SD OUT2
Output Filtered SD video output, channel 2
9dB
20
SD OUT1
Output Filtered SD video output, channel 1
Absolute Maximum Ratings
Min
Max
Unit
DC Supply Voltage
Parameter
-0.3
6
V
Analog and Digital I/O
-0.3
Vcc + 0.3
V
50
mA
Output Current, Any One Channel (Do Not Exceed)
Reliability Information
Parameter
Min
Typ
Junction Temperature
Storage Temperature Range
-65
Lead Temperature (Soldering, 10s)
Thermal Resistance (ThetaJA), JEDEC Standard Multi-Layer Test
Boards, Still Air
Max
Unit
150
˚C
150
˚C
300
˚C
74
˚C/W
Recommended Operating Conditions
Parameter
Min
Operating Temperature Range
Supply Voltage Range
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Typ
0
4.75
2
5.0
Max
Unit
70
˚C
5.25
V
FMS6346 Rev. 1B
Tc = 25˚C, Vcc = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into
150Ω loads, referenced to 400kHz; unless otherwise noted.
Symbol
Parameter
ICC
Supply
Current1
Conditions
Min
Typ
Max
no load
60
80
Referenced to GND, if DC-coupled
1.4
Units
Vin
Video Input Voltage Range
Vil
Digital Input Low1
FcSEL
0
0.8
V
Vih
Digital Input High1
FcSEL
2.4
Vcc
V
mA
Vpp
Standard Definition Electrical Characteristics
Tc = 25˚C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, all inputs AC coupled with 0.1µF, all outputs AC coupled
with 220µF into 150Ω loads, referenced to 400kHz; unless otherwise noted.
Symbol
Min
Typ
Max
Units
All SD Channels
5.6
6.0
6.4
dB
f1dBSD
-1dB
Bandwidth1
All SD Channels
5.2
7.15
MHz
fcSD
-3dB Bandwidth1
All SD Channels
6.5
8.0
MHz
All SD Channels at f = 27MHz
43
50
dB
0.7
%
AVSD
Parameter
Conditions
Channel Gain1
reject)1
fSBSD
Attenuation(stopband
DG
Differential Gain
All SD Channels
DP
Differential Phase
All SD Channels
1.0
˚
THD
Output Distortion
VOUT = 1.4Vpp, 3.58MHz
0.35
%
XTALKSD
Crosstalk (ch-to-ch)
at 1MHz
-54
dB
SNR
Signal-to-Noise Ratio2
NTC-7 weighting, 100kHz to 4.2MHz
72
dB
tpdSD
Propagation Delay
Delay from input to output, 4.5MHz
90
ns
High Definition Electrical Characteristics
Tc = 25˚C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, FcSEL = 1, all inputs AC coupled with 0.1µF, all outputs AC
coupled with 220µF into 150Ω loads, referenced to 400kHz; unless otherwise noted
Symbol
Parameter
Gain1
Conditions
Min
Typ
Max
6.4
Units
AVHD
Channel
All HD Channels
5.6
6.0
f1dBHD
-1dB Bandwidth1
All HD Channels
28
31
MHz
dB
fcHD
-3dB Bandwidth1
All HD Channels
30
34
MHz
fSBHD
Attenuation(stopband reject)1 All HD Channels at f = 74.25MHz
30
41
dB
THD
Output Distortion (all HD
channels)
VOUT = 1.4Vpp, 22MHz
0.9
%
XTALKHD
Crosstalk (ch-to-ch)
at 1MHz
-54
dB
SNR
Signal-to-Noise Ratio2
unweighted, 100kHz to 30MHz
60
dB
tpdHD
Propagation Delay
Delay from input to output
25
ns
Notes:
1. 100% tested at 25˚C
2. SNR = 20 * log (714mV/rms noise)
FMS6346 Rev. 1B
3
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
DC Electrical Characteristics
Tc = 25˚C, Vin = 1Vpp, VCC = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with
220µF into 150Ω loads; unless otherwise noted.
Figure 2. SD Flatness vs. Frequency
Figure 1. SD Gain vs. Frequency
0.35
0.30
Normalized Gain (dB)
Normalized Gain (dB)
5
0
-5
-10
-15
-20
-25
-30
-35
-40
0.25
0.20
0.15
0.10
0.05
0
-0.05
-45
-0.10
-50
400kHz
-0.15
5
10
15
20
25
30
400kHz
1
2
Frequency (MHz)
1.0-30
0.9
0.8-40
6
5
Using 0.1µF and 0.01µF
Bypass Capacitors as suggested
Normalized
PSRR Gain
(dB) (dB)
Normalized
Gain (dB)
PSRR (dB)
0-30
-5
-40
-10
0.7
0.6-50
-15-50
0.5
-60
0.4
-20-60
0.3
-70
0.2
-25
-70
-30
-80
-35
0.1-80
0
-0.1-90
-40-90
400kHz
0.1 10
20
30 1 40
50
60
10
70
80 30
400kHz
0.1
5
10
Frequency
Frequency(MHz)
(MHz)
1 15
10
25
20
3030
Frequency
Frequency
(MHz)
(MHz)
Figure 5. SD Group Delay vs. Frequency
Figure 6. HD Group Delay vs. Frequency
25
Normalized Group Delay (ns)
70
60
50
40
30
20
10
20
15
10
5
0
2
3
4
5
6
7
8
9
10
400kHz 5
Frequency (MHz)
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4
Figure 4. HD Flatness vs. Frequency
5-20
0
400kHz 1
3
Frequency (MHz)
Figure 3. HD Gain vs. Frequency
Normalized Group Delay (ns)
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Typical Performance Characteristics
10
15
20
25
30
35
40
45
Frequency (MHz)
4
FMS6346 Rev. 1B
Tc = 25˚C, Vin = 1Vpp, VCC = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with
220µF into 150Ω loads; unless otherwise noted.
Figure 8. HD Differential Phase
Figure 7. SD Differential Gain
1.0
NTSC
Differential Phase (Deg)
Differential Gain (%)
1.0
0.5
0
Min = 0.05
Max = 0.59
ppmax = 0.63
0
-1.0
Min = 0.00
Max = 1.00
ppmax = 1.00
-2.0
-1.0
1st
FMS6346 Rev. 1B
NTSC
2nd
3rd
4th
5th
6th
1st
5
2nd
3rd
4th
5th
6th
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Typical Performance Characteristics
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Applications Information
Functional Description
0.65V
The FMS6346 Low Cost Video Filter (LCVF) provides 6dB gain
(9dB optional, contact factory for further information) from input
to output. In addition, the input will be 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 the diagram below.
YIN
Driver
YOUT
800kΩ
1.0 -> 1.02V
Figure 10. Input Clamp Circuit
0.65 -> 0.67V
I/O Configurations
0.3 -> 0.32V
0.0 -> 0.02V
2.28V
1.58V
0.88V
0.28V
For DC-coupled DAC drive with DC-coupled outputs, use this
configuration:
VIN
VOUT
Driven by:
DC-Coupled DAC Outputs
AC-Coupled and Clamped
Y, CV, R, G, B
0V - 1.4V
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Inactive
75Ω
There will be a 280mV offset from the DC input level to the
DC output level. VOUT = 2 * VIN + 280mV
Figure 11. DC-coupled Inputs and Outputs
0.85V
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 follows:
0.5V
0.15V
VIN
0V - 1.4V
1.98V
DVD or
STB
SoC
DAC
Output
Driven by:
AC-Coupled and Biased
U, V, Pb, Pr, C
1.28V
0.58V
VOUT
0.1u
LCVF
Clamp
Active
75Ω
Figure 9. Typical Voltage Levels
The FMS6346 provides an internal diode clamp to support ACcoupled input signals. If the input signal does not go below
ground, the input clamp will not operate. This allows DAC outputs to directly drive the FMS6346 without an AC coupling
capacitor. The worst-case sync tip compression due to the
clamp will not exceed 7mV. The input level set by the clamp
combined with the internal DC offset will keep the output within
its acceptable range. When the input is AC-coupled, the diode
clamp will set the sync tip (or lowest voltage) just below ground.
Figure 12. AC-coupled Inputs, DC-coupled Outputs
When the FMS6346 is driven by an unknown external source or
a SCART switch with its own clamping circuitry, the inputs
should be AC-coupled as follows:
0V - 1.4V
0.1u
External Video
source must
be AC-coupled.
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 below:
LCVF
Clamp
Active
75Ω
75Ω
Figure 13. SCART Configuration with DC-coupled
Outputs
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6
FMS6346 Rev. 1B
The FMS6346 output drive configuration must be considered
when calculating overall power dissipation. Care must be taken
not to exceed the maximum die junction temperature. The following example can be used to calculate the FMS6346’s power
dissipation and internal temperature rise.
Tj = TA + Pd • ΘJA
External Video
source must
7.5MΩ
be AC-coupled. 0.1u
75Ω
where Pd = PCH1 + PCH2 + PCHx
LCVF
Bias
Input
and PCHx = Vs • ICH - (VO2/RL)
75Ω
where
VO = 2Vin + 0.280V
500mV +/-350mV
ICH = (ICC / 6) + (VO/RL)
Vin = RMS value of input signal
ICC = 60mA
Figure 14. Biased SCART with DC-coupled Outputs
Vs = 5V
The same circuits can be used with AC-coupled outputs if
desired.
RL = channel load resistance
0V - 1.4V
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Inactive
Board layout can also affect thermal characteristics. Refer to the
Layout Considerations Section for more information.
220u
75Ω
Layout Considerations
General layout and supply bypassing play major roles in high
frequency performance and thermal characteristics. Fairchild
offers a demonstration board, FMS6346DEMO, to use as a
guide for layout and to aid in device testing and characterization. The FMS6346DEMO is a 4-layer board with a full power
and ground plane. Following this layout configuration will provide the optimum performance and thermal characteristics. For
optimum results, follow the steps below as a basis for high frequency layout:
Figure 15. DC-coupled Inputs, AC-coupled Outputs
0V - 1.4V
DVD or
STB
SoC
DAC
Output
0.1u
LCVF
Clamp
Active
75Ω
• Include 10µF and 0.1µF ceramic bypass capacitors
220μ
• Place the 10µF capacitor within 0.75 inches of the power pin
• Place the 0.1µF capacitor within 0.1 inches of the power pin
• For multi-layer boards, use a large ground plane to help dissipate heat
• For 2 layer boards, use a ground plane that extends beyond
the device by at least 0.5”
Figure 16. AC-coupled Inputs, AC-coupled Outputs
• Minimize all trace lengths to reduce series inductances
External video
source must
7.5MΩ
be AC-coupled. 0.1μ
75Ω
LCVF
Clamp
Active
75Ω
220μ
500mV +/-350mV
Figure 17. Biased SCART with AC-coupled Outputs
NOTE: The video tilt or line time distortion will be dominated by
the AC-coupling capacitor. The value may need to be increased
beyond 220µF in order to obtain satisfactory operation in some
applications.
FMS6346 Rev. 1B
7
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Power Dissipation
The same method can be used for biased signals with the addition of a pull-up resistor to make sure the clamp never operates.
The internal pull-down resistance is 800kΩ ±20% so the external resistance should be 7.5MΩ to set the DC level to 500mV. If
a pull-up resistance less than 7.5MΩ is desired, an external
pull-down can be added such that the DC input level is set to
500mV.
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Typical Application Diagram
The following circuit may be used for direct DC-coupled drive by DACs with an output voltage range of 0V to 1.4V. AC-coupled or DCcoupled outputs may be used with AC-coupled outputs offering slightly lower power dissipation.
DVD Player or STB
+5V
0.1
uF
Y1OUT
10.0
uF
1
75Ω
220uF
75Ω
220uF
75Ω Video Cables
Y1
75Ω
C
19
COUT
SD IN2
SD OUT2
75Ω
3
CV
18
SD OUT3
SD IN3
75Ω
4
16, 17
N/C
Video
SoC
220uF
SD OUT1
2
CVOUT
75Ω
20
SD IN1
GND
FMS6346
20L TSSOP
5
Vcc
75Ω
G/Y2OUT
7
220uF
75Ω Video Cables
Y2/G
14
SD/HD IN1
SD/HD OUT1
75Ω
75Ω
B/PbOUT
8
220uF
Pb/B
13
SD/HD IN2
SD/HD OUT2
75Ω
75Ω
R/PrOUT
9 SD/HD IN3
N/C
220uF
Pr/R
SD/HD OUT3 12
FcSEL
15
75Ω
6
AC-Coupling Caps
are Optional
DAC Load Resistors
Figure 18. Typical Application Diagram
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8
FMS6346 Rev. 1B
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Mechanical Dimensions
20-Lead Thin Shrink Outline Package (TSSOP)
6
e
–B–
7
N
5
(b)
2X E/2
TSSOP-20
8
1.0 DIA
E1 E
c
SYMBOL
A
A1
A2
L
R
R1
b
b1
c
c1
01
L1
aaa
bbb
ccc
ddd
e
02
03
D
E1
E
e
N
c1
1.0
b1
ddd C B A
1 2 3
6
2X
N/2 TIPS
SECTION AA
e /2 9
1.0
ccc
7
A2
D 8 3
–A–
aaa C
A
–C–
b NX
A1
(02)
(0.20)
bbb M C B A
R1
–H–
R
GAGE
PLANE
10
A
0.25
(03)
L
A
01
(L1)
MIN
–
0.05
0.85
0.50
0.09
0.09
0.19
0.19
0.09
0.09
0°
NOM
–
–
0.90
0.60
–
–
–
0.22
–
–
–
1.0 REF
0.10
0.10
0.05
0.20
0.65 BSC
12° REF
12° REF
6.50
4.40
6.4 BSC
0.65 BSC
20
6.50
4.30
MAX
1.10
0.15
0.95
0.75
–
–
0.30
0.25
0.20
0.16
8°
6.60
4.50
NOTES:
1 All dimensions are in millimeters (angle in degrees).
2
Dimensioning and tolerancing per ASME Y14.5–1994.
3
Dimensions "D" does not include mold flash, protusions or gate burrs. Mold flash protusions or gate burrs shall not exceed 0.15 per side .
4
Dimension "E1" does not include interlead flash or protusion. Interlead flash or protusion shall not exceed 0.25 per side.
5
Dimension "b" does not include dambar protusion. Allowable dambar protusion shall be 0.08mm total in excess of the "b" dimension at maximum
material condition. Dambar connot be located on the lower radius of the foot. Minimum space between protusion and adjacent lead is 0.07mm
for 0.5mm pitch packages.
6
Terminal numbers are shown for reference only.
7
Datums – A – and – B – to be determined at datum plane – H – .
8
Dimensions "D" and "E1" to be determined at datum plane – H – .
9
This dimensions applies only to variations with an even number of leads per side. For variation with an odd number of leads per side, the "center"
lead must be coincident with the package centerline, Datum A.
10
Cross sections A – A to be determined at 0.10 to 0.25mm from the leadtip.
8 Lead
SYMBOL
D
E1
E
e
N
MIN
2.90
4.30
SYMBOL
D
E1
E
e
N
MIN
6.50
4.30
NOM
3.0
4.40
6.4 BSC
0.65 BSC
8
14 Lead
MAX
3.10
4.50
SYMBOL
D
E1
E
e
N
MIN
4.90
4.30
MAX
6.60
4.50
SYMBOL
D
E1
E
e
N
MIN
7.70
4.30
20 Lead
FMS6346 Rev. 1B
NOM
6.50
4.40
6.4 BSC
0.65 BSC
20
NOM
5.00
4.40
6.4 BSC
0.65 BSC
14
16 Lead
MAX
5.10
4.50
SYMBOL
D
E1
E
e
N
MIN
4.90
4.30
MAX
7.90
4.50
SYMBOL
D
E1
E
e
N
MIN
9.50
4.30
24 Lead
NOM
7.80
4.40
6.4 BSC
0.65 BSC
24
9
NOM
5.00
4.40
6.4 BSC
0.65 BSC
16
MAX
5.10
4.50
28 Lead
NOM
9.70
4.40
6.4 BSC
0.65 BSC
28
MAX
9.80
4.50
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Ordering Information
Gain
Option
Lead Free
Package
Container
Pack
Qty
FMS6346 FMS6346MTC20
6dB
Yes
TSSOP-20
Rail
94
FMS6346 FMS6346MTC20X
6dB
Yes
TSSOP-20
Reel
2500
Model
Part Number
Temperature range for all parts: 0˚C to 70˚C.
Contact Fairchild for additional gain options. Refer to the Factory Programming Options table for more information.
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10
FMS6346 Rev. 1B
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As used herein:
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1. Life support devices or systems are devices or
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be reasonably expected to cause the failure of the life
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failure to perform when properly used in accordance
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effectiveness.
reasonably expected to result in significant injury to the
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Definition of Terms
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Advance Information
Formative or
In Design
This datasheet contains the design specifications for
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First Production
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
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The datasheet is printed for reference information only.
Rev. I18
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©2006 Fairchild Semiconductor Corporation
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
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