Fairchild FMS6363CSX Low cost three channel 6th order high definition video filter driver Datasheet

FMS6363
Low Cost Three Channel 6th Order High Definition Video
Filter Driver
Features
Description
■
■
■
■
■
■
■
The FMS6363 Low Cost Video Filter (LCVF) is intended to
replace passive LC filters and drivers with a low-cost integrated
device. Three 6th order filters provide improved image quality
compared to typical lower order passive solutions.
Three sixth-order 30MHz (HD) 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
5V only
The FMS6363 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).
■ Robust 8KV ESD protection
■ Lead (Pb) Free package- SOIC-8
The outputs can drive AC or DC-coupled single (150Ω) loads.
DC-coupling the outputs removes the need for output coupling
capacitors. The input DC levels will be offset approximately
+280mV at the output (see applications section for details).
Applications
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■
■
■
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Cable and Satellite set top boxes
DVD players
HDTV
Personal Video Recorders (PVR)
Video On Demand (VOD)
Block Diagram
IN1
Transparent Clamp
6dB
OUT1
IN2
Transparent Clamp
6dB
OUT2
IN3
Transparent Clamp
6dB
OUT3
30MHz, 6th order
FMS6363 Rev. 1B
1
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©2005 Fairchild Semiconductor Corporation
FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
December 2005
FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
Pin Configuration
IN1
IN2
IN3
Vcc
Pin Assignments
1
8
OUT1
2
FAIRCHILD
7
OUT2
3
FMS6363
SOIC-8
6
OUT3
4
5
GND
Pin#
Pin
Type
Description
1
IN1
Input
Video input, channel 1
2
IN2
Input
Video input, channel 2
3
IN3
Input
Video input, channel 3
4
VCC
Input
+5V supply
5
GND
Input
Ground
6
OUT3
Output
Filtered output, channel 3
7
OUT2
Output
Filtered output, channel 2
8
OUT1
Output
Filtered 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)
Max.
150
˚C
150
˚C
300
Thermal Resistance (ThetaJA), JEDEC Standard, Multi-Layer Test
Boards, Still Air
Unit
112.7
˚C
˚C/W
Recommended Operating Conditions
Parameter
Min.
Operating Temperature Range
Supply Voltage Range
4.75
Input Source Resistance (RSOURCE)
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Typ.
0
2
5.0
Max.
Unit
70
˚C
5.25
V
300
Ω
FMS6363 Rev. 1B
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.
Typ.
Max
Units
ICC
Symbol
Supply Current1
Parameter
no load
Conditions
Min.
22
30
mA
Vin
Video Input Voltage Range
Referenced to GND, if DC-coupled
1.4
Vpp
AC 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
AV
Parameter
Channel Gain1
Bandwidth1
f1dB
-1dB
fc
-3dB Bandwidth
fSB1
fSB2
Attenuation(stopband reject)
Min.
Typ.
Max
Units
All Channels
Conditions
5.4
6.0
6.6
dB
All Channels
23
30
MHz
All Channels
33
MHz
All Channels at f = 37.125MHz
6.5
dB
14.5
dB
36
dB
All Channels at f = 44.25MHz
All Channels at f = 74.25MHz1
fSB3
32
Output Distortion3
(all channels)
VOUT = 1.4Vpp, 10MHz
0.2
%
VOUT = 1.4Vpp, 15MHz
0.4
%
VOUT = 1.4Vpp, 22MHz
1.2
%
XTALK
Crosstalk (ch-to-ch)
at 1MHz
-60
dB
SNR1
SNR2
Signal-to-Noise Ratio2
(all channels)
unweighted; 30MHz lowpass, 100kHz to
30MHz
65
dB
tpd
Propagation Delay
Delay from input to output
20
ns
THD1
THD2
THD3
Notes:
1. 100% tested at 25˚C
2. SNR = 20 * log (714mV/rms noise)
3. 1.4Vpp active video
FMS6363 Rev. 1B
3
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FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
DC Electrical Characteristics
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.
Figure 2. Group Delay vs. Frequency
Figure 1. Frequency Response
12
15
Mkr Frequency
Ref 400kHz
1
0
Gain (dB)
-6
-12
Gain
6dB
1
10
1
2
28.847MHz -1dB BW
33.11MHz -3dB BW
3
74.25MHz
5
Delay (ns)
2
6
-32.11dB
fSBSD = Gain(ref) – Gain(3) = 38.11dB
-18
-24
-30
0
-5
-10
-36
3
-15
-42
1 = 32MHz (10.32ns)
-48
400kHz 20
40
60
80
100
120
-20
400kHz 10
140
20
Frequency (MHz)
30
40
50
60
70
80
90
Frequency (MHz)
Figure 3. PSRR vs. Freq. (No Bypass Caps)
Figure 4. PSRR vs. Freq. (Bypass Caps)
-20
-30
-30
-40
Using 0.1µF and 0.01µF
Bypass Capacitors as suggested
PSRR (dB)
-40
PSRR (dB)
-50
-60
-70
-50
-60
-70
-80
-80
-90
-90
0.1
10
1
30
0.1
Frequency (MHz)
1
10
30
Frequency (MHz)
Figure 5. SYNC Tip Compression vs. RSOURCE
2
SYNC Tip Compression (mV)
FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
Typical Performance Characteristics
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
25
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50
75 100 125 150 175 200 225 250 275 300
4
FMS6363 Rev. 1B
coupling capacitor. A conceptual illustration of the input clamp
circuit is shown below:
Functional Description
The FMS6363 Low Cost Video Filter (LCVF) provides 6dB gain
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
1.02V
Figure 7. Input Clamp Circuit
I/O Configurations
0.32V
0.02V
Vin
Driven by:
DC-Coupled DAC Outputs or
AC-Coupled and Clamped
Y, R, G, B, CV
2.28V
0.88V
0.28V
For DC-coupled DAC drive with DC-coupled outputs, use this
configuration:
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
75Ω
0.85V
0.5V
0.15V
Figure 8. DC-coupled inputs and outputs
1.98V
Driven by:
DC-Coupled DAC Outputs
AC-Coupled and Biased
U, V, Pb, Pr, C
1.28V
0.58V
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:
Vin
0V - 1.4V
DVD or
STB
SoC
DAC
Output
Vout
0.1u
LCVF
Clamp
Active
75Ω
Figure 6. Typical Voltage Levels
The FMS6363 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 FMS6363 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 9. AC-coupled inputs, DC-coupled outputs
When the FMS6363 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
75Ω
75Ω
Figure 10. SCART with DC-coupled outputs
FMS6363 Rev. 1B
5
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FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
Applications Information
FMS6363 Low Cost Three Channel 6th Order High Definition 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 pulldown can be added such that the DC input level is set to 500mV.
The FMS6363 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 FMS6363’s power
dissipation and internal temperature rise.
Tj = TA + Pd • ΘJA
External Video
source must
be AC-coupled.
75Ω
where Pd = PCH1 + PCH2 + PCH3
7.5MΩ
0.1u
LCVF
Bias
Input
75Ω
and PCHx = Vs • ICH - (VO2/RL)
where
500mV +/-350mV
VO = 2Vin + 0.280V
ICH = (ICC / 3) + (VO/RL)
Vin = RMS value of input signal
Figure 11. Biased SCART with
DC-coupled outputs
ICC = 24mA
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
The FMS6363 is specified to operate with output currents typically less than 50mA, more than sufficient for a single (150Ω)
video load. Internal amplifiers are current limited to a maximum
of 100mA and should withstand brief duration short circuit conditions, however this capability is not guaranteed.
Layout Considerations
Figure 12. DC-coupled inputs,
AC-coupled Outputs
General layout and supply bypassing play major roles in high
frequency performance and thermal characteristics. Fairchild
offers a demonstration board, FMS6363DEMO, to use as a
guide for layout and to aid in device testing and characterization.
The FMS6363DEMO is a 4-layer board with a full power and
ground plane. For optimum results, follow the steps below as a
basis for high frequency layout:
0V - 1.4V
0.1u
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Active
75Ω
220u
• Include 10µF and 0.1µF ceramic bypass capacitors
• 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
• Connect all external ground pins as tightly as possible,
preferably with a large ground plane under the package
Figure 13. AC-coupled inputs and outputs
• Layout channel connections to reduce mutual trace inductance
External video
source must
be AC-coupled.
75Ω
• Minimize all trace lengths to reduce series inductances. If
routing across a board, place device such that longer traces
are at the inputs rather than the outputs.
7.5MΩ
0.1u
LCVF
Clamp
Active
75Ω
220u
If using multiple, low impedance DC coupled outputs, special
layout techniques may be employed to help dissipate heat.
500mV +/-350mV
If a multilayer board is used, a large ground plane directly
under the device will help reduce package case temperature.
Figure 14. Biased SCART with
AC-coupled outputs
For dual layer boards, an extended plane can be used.
Worse case additional die power due to DC loading can be
estimated at (VCC2/4Rload) per output channel. This assumes a
constant DC output voltage of VCC2. For 5V Vcc with a dual DC
video load, add 25/(4*75) = 83mW, per channel.
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.
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6
FMS6363 Rev. 1B
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
IN1
RSOURCE
Video
SoC
220uF
75Ω
220uF
OUT1
FMS6363
8L SOIC
2
G/Y
75Ω
IN2
R/Pr
75Ω
G/Y
7
OUT2
75Ω
RSOURCE
75Ω
220uF
B/Pb
6
3
B/Pb
75Ω Video Cables
8
1
R/Pr
IN3
OUT3
75Ω
RSOURCE
5
4
Vcc
GND
DAC Load Resistors
AC-Coupling Caps
are Optional
RSOURCE = DAC load resistor // video SoC output resistance
Figure 15. Typical application diagram
FMS6363 Rev. 1B
7
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FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
Typical Application Diagram
FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
Mechanical Dimensions
8-Lead Small Outline Package (SOIC)
SOIC-8
D
SYMBOL
A1
B
C
D
E
e
H
h
L
A
7
e
ZD
CL
CL
Pin No. 1
E
H
B
ZD
A2
DETAIL-A
L
NOTE:
h x 45
A
A1
A2
DETAIL-A
α
C
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MIN
MAX
0.10
0.25
0.36
0.46
0.19
0.25
4.80
4.98
3.81
3.99
1.27 BSC
5.80
6.20
0.25
0.50
0.41
1.27
1.52
1.72
8°
0°
0.53 ref
1.37
1.57
8
1. All dimensions are in millimeters.
2. Lead coplanarity should be 0 to 0.10mm (.004") max.
3. Package surface finishing:
(2.1) Top: matte (charmilles #18~30).
(2.2) All sides: matte (charmilles #18~30).
(2.3) Bottom: smooth or matte (charmilles #18~30).
4. All dimensions excluding mold flashes and end flash
from the package body shall not exceed 0.152mm (.006)
per side (D).
FMS6363 Rev. 1B
FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
Ordering Information
Model
Part Number
Container
Pack
Qty
Lead Free
Package
FMS6363 FMS6363CS
Yes
SOIC-8
Rail
95
FMS6363 FMS6363CSX
Yes
SOIC-8
Reel
2500
Temperature range for all parts: 0˚C to 70˚C.
FMS6363 Rev. 1B
9
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FMS6363 Rev. 1B
10
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FMS6363 Low Cost Three Channel 6th Order High Definition Video Filter Driver
75$'(0$5.6