Fairchild FMS6346MTC20 Six channel, 6th order sd/hd video filter driver Datasheet

FMS6346
Six Channel, 6th Order SD/HD Video Filter Driver
Features
Description
■ Three selectable sixth-order 8/32MHz (SD/HD) filters
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 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
The FMS6346 offers a fixed gain of 6dB. A metal option is available that provides a fixed gain of 9dB, offering even more flexibility.
■ 5V only
■ Robust (12kV HBM) output ESD protection
■ Lead (Pb) Free packages - TSSOP-20
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
■ Cable and Satellite set top boxes
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.
■ 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 OUT
SD/HD IN2
Transparent Clamp
6dB
SD/HD OUT
SD/HD IN3
Transparent Clamp
6dB
SD/HD OUT
Selectable
8/32MHz
6th order
FcSEL SD / HD
©2004 Fairchild Semiconductor Corporation
FMS6346 Rev. 1A
1
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
July 2005
Pin Assignments
SD IN1
1
20
SD OUT1
SD IN2
2
19
SD OUT2
SD IN3
3
18
SD OUT3
N/C
4
17
Gnd
FAIRCHILD
Vcc
5
FcSEL
6
SD/HD IN1
7
SD/HD IN2
SD/HD IN3
N/C
8
Pin
Type
1
SD IN1
Input
SD video input, channel 1
2
SD IN2
Input
SD video input, channel 2
3
SD IN3
Input
SD video input, channel 3
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
Gnd
11
N/C
Input
15
N/C
12
SD/HD OUT3
Output
Filtered SD or HD video output, channel 3
14
SD/HD OUT1
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
13
SD/HD OUT2
9
12
SD/HD OUT3
10
11
N/C
No Connect
15
N/C
Input
No Connect
16
Gnd
Input
Must be tied to Ground
17
Gnd
Input
18
SD OUT3
Output
Filtered SD video output, channel 3
19
SD OUT2
Output
Filtered SD video output, channel 2
20
SD OUT1
Output
Filtered SD video output, channel 1
2
FMS6346 Rev. 1A
Description
16
FMS6346
20L TSSOP
Pin#
Must be tied to Ground
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Pin Configuration
Parameter
Min.
Max.
Unit
DC Supply Voltage
-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)
Max.
150
°C
150
°C
300
Thermal Resistance (ThetaJA), JEDEC Standard Multi-Layer Test
Boards, Still Air
Unit
74
°C
°C/W
Recommended Operating Conditions
Parameter
Min.
Operating Temperature Range
Typ.
Max.
Unit
70
°C
5.0
5.25
V
0
Supply Voltage Range
4.75
Factory Programming Options
Part Name
Part Number
Gain Option
FMS6346
FMS6346MTC20
6dB
FMS6346-9
FMS6346MTC209
9dB
3
FMS6346 Rev. 1A
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Absolute Maximum Ratings
Tc = 25°C, Vcc = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1uF, all outputs AC coupled with 220uF into
150Ω loads, referenced to 400kHz; unless otherwise noted.
Symbol
Parameter
Current1
Conditions
Min.
Typ.
Max
80
Units
ICC
Supply
no load
60
Vin
Video Input Voltage Range
Referenced to GND, if DC-coupled
1.4
mA
Vil
Digital Input Low1
FcSEL
0
0.8
V
Vih
Digital Input High1
FcSEL
2.4
Vcc
V
Vpp
Standard Definition Electrical Characteristics
Tc = 25°C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, all inputs AC coupled with 0.1uF, all outputs AC coupled
with 220uF into 150Ω loads, referenced to 400kHz; unless otherwise noted.
Symbol
AVSD
Parameter
Channel
Conditions
Gain1
Min.
Typ.
Max
Units
6.4
dB
All SD Channels
5.6
6.0
f1dBSD
-1dB Bandwidth
1
All SD Channels
5.2
7.15
MHz
fcSD
-3dB Bandwidth1
All SD Channels
6.5
8.0
MHz
fSBSD
Attenuation(stopband reject)1 All SD Channels at f = 27MHz
50
dB
DG
Differential Gain
All SD Channels
0.7
%
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
43
High Definition Electrical Characteristics
Tc = 25°C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, all inputs AC coupled with 0.1uF, all outputs AC coupled
with 220uF into 150Ω loads, referenced to 400kHz; unless otherwise noted
Symbol
Min.
Typ.
Max
Units
All HD Channels
5.6
6.0
6.4
dB
f1dBHD
-1dB Bandwidth
1
All HD Channels
28
31
MHz
fcHD
-3dB Bandwidth1
All HD Channels
30
34
MHz
All HD Channels at f = 74.25MHz
30
AVHD
Parameter
Conditions
Channel Gain1
1
fSBHD
Attenuation(stopband reject)
41
dB
THD
Output Distortion (all HD
channels)
VOUT = 1.4Vpp, 22MHz
0.9
%
XTALKHD
Crosstalk (ch-to-ch)
at 1MHz
-54
dB
unweighted, 100kHz to 30MHz
60
dB
Delay from input to output
25
ns
SNR
Signal-to-Noise Ratio
tpdHD
Propagation Delay
2
Notes:
1. 100% tested at 25°C
2. SNR = 20 * log (714mV / rms noise)
4
FMS6346 Rev. 1A
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
DC Electrical Characteristics
coupling capacitor. A conceptual illustration of the input clamp
circuit is shown below:
Functional Description
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.
0.65V
YIN
Driver
YOUT
800kΩ
1.0 -> 1.02V
Figure 2. Input Clamp Circuit
0.65 -> 0.67V
I/O Configurations
0.3 -> 0.32V
0.0 -> 0.02V
Vin
For DC-coupled DAC drive with DC-coupled outputs, use this
configuration:
Driven by:
DC-Coupled DAC Outputs or
AC-Coupled and Clamped
Y, R, G, B, CV
2.28V
1.58V
0.88V
0.28V
0V - 1.4V
DVD or
STB
SoC
DAC
Output
Vout
There will be a 280mV offset from the DC input level to
the DC output level.
Vout = 2 * Vin + 280mV
LCVF
Clamp
Inactive
75
0.85V
Figure 3. DC-coupled Inputs and Outputs
0.5V
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:
0.15V
Vin
0V - 1.4V
1.98V
Driven by:
DC-Coupled DAC Outputs
AC-Coupled and Biased
U, V, Pb, Pr, C
1.28V
0.58V
DVD or
STB
SoC
DAC
Output
Vout
0.1u
LCVF
Clamp
Active
75
Figure 1. 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 4. 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
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
0.1u
External Video
source must
be AC-coupled.
LCVF
Clamp
Active
75
75
Figure 5. SCART Configuration with DC-coupled
Outputs
5
FMS6346 Rev. 1A
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Applications Information
Power Dissipation
External Video
source must
be AC-coupled.
where Pd = PCH1 + PCH2 + PCHx
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
0.1u
7.5M
and PCHx = Vs • ICH - (VO2/RL)
75
LCVF
Bias
Input
where
VO = 2Vin + 0.280V
500mV +/-350mV
75
ICH = (ICC / 6) + (VO/RL)
Vin = RMS value of input signal
ICC = 60mA
Figure 6. Biased SCART with DC-coupled Outputs
Vs = 5V
The same circuits can be used with AC-coupled outputs if
desired.
0V - 1.4V
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Inactive
75
RL = channel load resistance
Board layout can also affect thermal characteristics. Refer to the
Layout Considerations Section for more information.
220u
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 7. DC-coupled Inputs, AC-coupled Outputs
0V - 1.4V
0.1u
DVD or
STB
SoC
DAC
Output
• Include 10µF and 0.1µF ceramic bypass capacitors
LCVF
Clamp
Active
75
220u
• 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 8. DC-coupled Inputs, AC-coupled Outputs
External video
source must
be AC-coupled.
0.1u
7.5M
LCVF
Clamp
Active
75
• Minimize all trace lengths to reduce series inductances
220u
500mV +/-350mV
75
Figure 9. 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 220uF in order to obtain satisfactory operation in some
applications.
6
FMS6346 Rev. 1A
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
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.
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
10
uF
75Ω
220uF
75Ω
220uF
75Ω
220uF
75Ω Video Cables
Y1
20
1
Y1OUT
SD IN1
SD OUT1
75Ω
2
C
19
COUT
SD IN2
SD OUT2
75Ω
CV
18
3
CVOUT
SD IN3
SD OUT3
75Ω
5
Video
SoC
Vcc
FAIRCHILD
FMS6346
20L TSSOP
16,17
GND
75Ω
220uF
75Ω
220uF
75Ω
220uF
75Ω Video Cables
Y2/G
14
7
G/Y2OUT
SD/PS IN1
SD/PS OUT1
75Ω
Pb/B
13
8
B/PbOUT
SD/PS IN2
SD/PS OUT2
75Ω
Pr/R
12
9
R/PrOUT
SD/PS IN3
SD/PS OUT3
FcSEL
6
DAC Load Resistors
75Ω
AC-Coupling Caps
are Optional.
Figure 10. Typical application diagram
7
FMS6346 Rev. 1A
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Typical Application Diagram
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
A2
D 8 3
7 –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
NOM
6.50
4.40
6.4 BSC
0.65 BSC
20
NOM
5.00
4.40
6.4 BSC
0.65 BSC
14
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
8
FMS6346 Rev. 1A
16 Lead
MAX
5.10
4.50
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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Gain
Option
Lead Free
Package
Container
Pack
Qty
FMS6346 FMS6346MTC20
6dB
Yes
TSSOP-20
Rail
TBD
FMS6346 FMS6346MTC20X
6dB
Yes
TSSOP-20
Reel
TBD
Model
Part Number
Temperature range for all parts: 0°C to 70°C.
Contact Fairchild for additional gain options. Refer to Factory Programming Options Table for more information.
9
FMS6346 Rev. 1A
www.fairchildsemi.com
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Ordering Information
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OPTOPLANAR™
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PowerTrench®
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QS™
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CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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support device or system, or to affect its safety or
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
effectiveness.
reasonably expected to result in significant injury to the
user.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or
In Design
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Obsolete
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Rev. I7
10
FMS6346 Rev. 1A
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
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