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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
Features
Three selectable sixth-order 8/32MHz (SD/HD) filters Three fixed sixth-order 8MHz (SD) filters Transparent input clamping Single video load drive (2Vpp, 150, 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
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. 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). The outputs can drive AC or DC-coupled single (150) 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.
Applications
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
Selectable 8/32MHz 6th order
FMS6346 Rev. 1B
1
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Pin Configuration
SD IN1 SD IN2 SD IN3 N/C VCC FcSEL SD/HD IN1 SD/HD IN2 SD/HD IN3 N/C
Pin Assignments
20 19
SD OUT1 SD OUT2 SD OUT3 GND GND N/C SD/HD OUT1 SD/HD OUT2 SD/HD OUT3
1 2 3 4 5 6 7 8 9 10
Pin #
1 2 3 4 5
Pin
SD IN1 SD IN2 SD IN3 N/C VCC FcSEL SD/HD IN1 SD/HD IN2 SD/HD IN3 N/C N/C
Type
Input Input Input Input Input Input Input Input Input Input Input
Description
SD video input, channel 1 SD video input, channel 2 SD video input, channel 3 No Connect +5V supply Selects filter corner frequency for pins 7, 8, and 9. "0" = SD, "1" = HD Selectable SD or HD video input, channel 1 Selectable SD or HD video input, channel 2 Selectable SD or HD video input, channel 3 No Connect No Connect
FMS6346
20L TSSOP
18 17 16 15 14 13 12 11
6 7 8 9
N/C
10 11 12 13 14
SD/HD OUT3 Output Filtered SD or HD video output, channel 3 SD/HD OUT2 Output Filtered SD or HD video output, channel 2 SD/HD OUT1 Output Filtered SD or HD video output, channel 1 N/C GND GND SD OUT3 SD OUT2 SD OUT1 Input Input Input No Connect Must be tied to Ground Must be tied to Ground
Factory Programming Options
Part Name
FMS6346
15 16 17 18 19 20
Part Number
FMS6346MTC20
Gain Option
6dB 9dB
Output Filtered SD video output, channel 3 Output Filtered SD video output, channel 2 Output Filtered SD video output, channel 1
FMS6346-9 FMS6346MTC209
Absolute Maximum Ratings
Parameter
DC Supply Voltage Analog and Digital I/O Output Current, Any One Channel (Do Not Exceed)
Min
-0.3 -0.3
Max
6 Vcc + 0.3 50
Unit
V V mA
Reliability Information
Parameter
Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10s) Thermal Resistance (ThetaJA), JEDEC Standard Multi-Layer Test Boards, Still Air 74 -65
Min
Typ
Max
150 150 300
Unit
C C C C/W
Recommended Operating Conditions
Parameter
Operating Temperature Range Supply Voltage Range
Min
0 4.75
Typ
5.0
Max
70 5.25
Unit
C V
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2
FMS6346 Rev. 1B
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
DC Electrical Characteristics
Tc = 25C, Vcc = 5V, Rsource = 37.5, inputs AC coupled with 0.1F, all outputs AC coupled with 220F into 150 loads, referenced to 400kHz; unless otherwise noted. Symbol
ICC Vin Vil Vih Supply
Parameter
Current1 no load Video Input Voltage Range Digital Input Low1 Digital Input High1
Conditions
Referenced to GND, if DC-coupled FcSEL FcSEL
Min
Typ
60 1.4
Max
80
Units
mA Vpp
0 2.4
0.8
V V
Vcc
Standard Definition Electrical Characteristics
Tc = 25C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5, all inputs AC coupled with 0.1F, all outputs AC coupled with 220F into 150 loads, referenced to 400kHz; unless otherwise noted. Symbol
AVSD f1dBSD fcSD fSBSD DG DP THD XTALKSD SNR tpdSD -1dB
Parameter
Channel Gain1 Bandwidth1 reject)1 -3dB Bandwidth1 Attenuation(stopband Differential Gain Differential Phase Output Distortion Crosstalk (ch-to-ch) Signal-to-Noise Ratio2 Propagation Delay
Conditions
All SD Channels All SD Channels All SD Channels All SD Channels at f = 27MHz All SD Channels All SD Channels VOUT = 1.4Vpp, 3.58MHz at 1MHz NTC-7 weighting, 100kHz to 4.2MHz Delay from input to output, 4.5MHz
Min
5.6 5.2 6.5 43
Typ
6.0 7.15 8.0 50 0.7 1.0 0.35 -54 72 90
Max
6.4
Units
dB MHz MHz dB % % dB dB ns
High Definition Electrical Characteristics
Tc = 25C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5, FcSEL = 1, all inputs AC coupled with 0.1F, all outputs AC coupled with 220F into 150 loads, referenced to 400kHz; unless otherwise noted Symbol
AVHD f1dBHD fcHD fSBHD THD XTALKHD SNR tpdHD
Parameter
Channel Gain1 -1dB Bandwidth1 -3dB Bandwidth1
Conditions
All HD Channels All HD Channels All HD Channels
Min
5.6 28 30 30
Typ
6.0 31 34 41 0.9 -54 60 25
Max
6.4
Units
dB MHz MHz dB % dB dB ns
Attenuation(stopband reject)1 All HD Channels at f = 74.25MHz Output Distortion (all HD channels) Crosstalk (ch-to-ch) Signal-to-Noise Ratio2 Propagation Delay VOUT = 1.4Vpp, 22MHz at 1MHz unweighted, 100kHz to 30MHz Delay from input to output
Notes: 1. 100% tested at 25C 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
Typical Performance Characteristics
Tc = 25C, Vin = 1Vpp, VCC = 5V, Rsource = 37.5, inputs AC coupled with 0.1F, all outputs AC coupled with 220F into 150 loads; unless otherwise noted. Figure 1. SD Gain vs. Frequency
5 0
Figure 2. SD Flatness vs. Frequency
0.35 0.30
Normalized Gain (dB)
-5 -10 -15 -20 -25 -30 -35 -40 -45 -50 400kHz 5 10 15 20 25 30
Normalized Gain (dB)
0.25 0.20 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 400kHz 1 2 3 4 5 6
Frequency (MHz)
Frequency (MHz)
Figure 3. HD Gain vs. Frequency
5 -20 0 -30 -5 -40 -10 -50 -15 -20 -60 -25 -70 -30 -80 -35 20 30 1 40 50 60 10 70 80 30
Figure 4. HD Flatness vs. Frequency
-30 1.0 0.9 -40 0.8 0.7 -50 0.6 0.5 -60 0.4 0.3 -70 0.2
Using 0.1F and 0.01F Bypass Capacitors as suggested
Normalized Gain (dB) PSRR (dB)
-90 -40 400kHz 10 0.1
Normalized (dB) (dB) PSRR Gain
0.1 -80 0 -90 -0.1 400kHz 0.1 5 10 1 15 20 10 25 3030
Frequency (MHz) Frequency (MHz)
Frequency (MHz) Frequency (MHz)
Figure 5. SD Group Delay vs. Frequency
70
Figure 6. HD Group Delay vs. Frequency
25
Normalized Group Delay (ns)
60 50 40 30 20 10 0 400kHz 1
Normalized Group Delay (ns)
2 3 4 5 6 7 8 9 10
20 15 10 5 0 400kHz 5 10 15 20 25 30 35 40 45
Frequency (MHz)
Frequency (MHz)
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4
FMS6346 Rev. 1B
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Typical Performance Characteristics
Tc = 25C, Vin = 1Vpp, VCC = 5V, Rsource = 37.5, inputs AC coupled with 0.1F, all outputs AC coupled with 220F into 150 loads; unless otherwise noted. Figure 7. SD Differential Gain
1.0
NTSC
Figure 8. HD Differential Phase
1.0
NTSC
0.5
Differential Phase (Deg)
Differential Gain (%)
0
0
Min = 0.05 Max = 0.59 ppmax = 0.63
-1.0
Min = 0.00 Max = 1.00 ppmax = 1.00
-1.0 1st 2nd 3rd 4th 5th 6th
-2.0 1st 2nd 3rd 4th 5th 6th
FMS6346 Rev. 1B
5
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Applications Information
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
YOUT
YIN
Driver
800k
1.0 -> 1.02V 0.65 -> 0.67V 0.3 -> 0.32V 0.0 -> 0.02V VIN
Figure 10. Input Clamp Circuit I/O Configurations
For DC-coupled DAC drive with DC-coupled outputs, use this configuration:
Driven by: DC-Coupled DAC Outputs AC-Coupled and Clamped Y, CV, R, G, B
2.28V 1.58V 0.88V 0.28V VOUT
0V - 1.4V
DVD or STB SoC DAC Output
LCVF Clamp Inactive
75
There will be a 280mV offset from the DC input level to the DC output level. VOUT = 2 * VIN + 280mV
0.85V 0.5V 0.15V VIN
Figure 11. DC-coupled Inputs and Outputs
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:
0V - 1.4V
1.98V 1.28V 0.58V VOUT
Driven by: AC-Coupled and Biased U, V, Pb, Pr, C
DVD or STB SoC DAC Output
0.1u
LCVF Clamp Active
75
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. 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:
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.
75
LCVF Clamp Active
75
Figure 13. SCART Configuration with DC-coupled Outputs
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6
FMS6346 Rev. 1B
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 800k 20% so the external resistance should be 7.5M to set the DC level to 500mV. If a pull-up resistance less than 7.5M is desired, an external pull-down can be added such that the DC input level is set to 500mV.
External Video source must 7.5M be AC-coupled. 0.1u
Power Dissipation
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 * JA where Pd = PCH1 + PCH2 + PCHx and PCHx = Vs * ICH - (VO2/RL) where VO = 2Vin + 0.280V ICH = (ICC / 6) + (VO/RL) Vin = RMS value of input signal ICC = 60mA
LCVF Bias Input
75
75
500mV +/-350mV
Figure 14. Biased SCART with DC-coupled Outputs
The same circuits can be used with AC-coupled outputs if desired.
Vs = 5V RL = channel load resistance Board layout can also affect thermal characteristics. Refer to the Layout Considerations Section for more information.
0V - 1.4V
DVD or STB SoC DAC Output
LCVF Clamp Inactive
75
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: * Include 10F and 0.1F ceramic bypass capacitors * Place the 10F capacitor within 0.75 inches of the power pin * Place the 0.1F capacitor within 0.1 inches of the power pin * For multi-layer boards, use a large ground plane to help dissipate heat
Figure 15. DC-coupled Inputs, AC-coupled Outputs
0V - 1.4V
DVD or STB SoC DAC Output
0.1u
LCVF Clamp Active
75
220
Figure 16. AC-coupled Inputs, AC-coupled Outputs
External video source must 7.5M be AC-coupled. 0.1
* For 2 layer boards, use a ground plane that extends beyond the device by at least 0.5" * Minimize all trace lengths to reduce series inductances
LCVF Clamp Active
75
220
75
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 220F 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
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
0.1 uF 10.0 uF
+5V
75
220uF
75 Video Cables 75
Y1OUT
1 SD IN1 2 SD OUT1
20
Y1
75
19 SD IN2 SD OUT2
220uF 75
C
COUT
3
75
220uF 75
CVOUT
18 SD IN3 SD OUT3
CV
4 N/C GND
16, 17
Video SoC
5 Vcc
FMS6346 20L TSSOP
75
220uF
75 Video Cables 75
G/Y2OUT
7 SD/HD IN1 SD/HD OUT1
14
Y2/G
75
220uF 75
B/PbOUT
8 SD/HD IN2 SD/HD OUT2
13
Pb/B
75
220uF 75
R/PrOUT
9 SD/HD IN3 N/C
SD/HD OUT3 12 FcSEL
Pr/R
15
6
DAC Load Resistors
AC-Coupling Caps are Optional
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 N 5
e
-B-
7
2X E/2 1.0 DIA 1.0
(b)
8
TSSOP-20
c1 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 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 MAX 1.10 0.15 0.95 0.75 - - 0.30 0.25 0.20 0.16 8
E1 E
c
b1 ddd C B A
2X N/2 TIPS 123 6
1.0
e /2 9
SECTION AA
ccc
7
-A-
D8 3
A2 A
aaa C
-C-
b NX bbb M C B A
A1
(02) (0.20) R1
-H-
R
GAGE PLANE 10
6.50 4.30
6.60 4.50
A A
0.25
(03)
L (L1)
01
NOTES:
1 All dimensions are in millimeters (angle in degrees).
2 3 4 5
Dimensioning and tolerancing per ASME Y14.5-1994. Dimensions "D" does not include mold flash, protusions or gate burrs. Mold flash protusions or gate burrs shall not exceed 0.15 per side . Dimension "E1" does not include interlead flash or protusion. Interlead flash or protusion shall not exceed 0.25 per side. 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. Terminal numbers are shown for reference only. Datums - A - and - B - to be determined at datum plane - H - . Dimensions "D" and "E1" to be determined at datum plane - H - . 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. Cross sections A - A to be determined at 0.10 to 0.25mm from the leadtip.
6 7 8 9 10
8 Lead
SYMBOL D E1 E e N MIN 2.90 4.30 NOM 3.0 4.40 6.4 BSC 0.65 BSC 8 MAX 3.10 4.50 SYMBOL D E1 E e N
14 Lead
MIN 4.90 4.30 NOM 5.00 4.40 6.4 BSC 0.65 BSC 14 MAX 5.10 4.50 SYMBOL D E1 E e N
16 Lead
MIN 4.90 4.30 NOM 5.00 4.40 6.4 BSC 0.65 BSC 16 MAX 5.10 4.50
20 Lead
SYMBOL D E1 E e N MIN 6.50 4.30 NOM 6.50 4.40 6.4 BSC 0.65 BSC 20 MAX 6.60 4.50 SYMBOL D E1 E e N
24 Lead
MIN 7.70 4.30 NOM 7.80 4.40 6.4 BSC 0.65 BSC 24 MAX 7.90 4.50 SYMBOL D E1 E e N
28 Lead
MIN 9.50 4.30 NOM 9.70 4.40 6.4 BSC 0.65 BSC 28 MAX 9.80 4.50
FMS6346 Rev. 1B
9
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FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
Ordering Information
Model Part Number Gain Option 6dB 6dB Lead Free Yes Yes Package TSSOP-20 TSSOP-20 Container Rail Reel Pack Qty 94 2500
FMS6346 FMS6346MTC20 FMS6346 FMS6346MTC20X
Temperature range for all parts: 0C to 70C. Contact Fairchild for additional gain options. Refer to the Factory Programming Options table for more information.
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FMS6346 Rev. 1B
FMS6346 Six Channel, 6th Order SD/HD Video Filter Driver
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.
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FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component is any component of a life 1. Life support devices or systems are devices or support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose 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 Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. 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. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.
Preliminary
First Production
No Identification Needed
Full Production
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. I18
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(c)2006 Fairchild Semiconductor Corporation

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