FMS6690 Six Channel, 6th Order SD/PS/HD Video Filter Driver
January 2006
FMS6690
Six Channel, 6th Order SD/PS/HD Video Filter Driver
Features
■
■
■
■
■
■
■
■
■
■
Three selectable sixth-order 15/32MHz (PS/HD) filters
Three fixed sixth-order 8MHz (SD) filters with muxed input
Transparent input clamping
Single video load drive (2Vpp, 150
Ω
, A
V
= 6dB)
AC or DC-coupled inputs
AC or DC-coupled outputs
DC-coupled outputs eliminate AC-coupling capacitors
Low power
5V only
Lead (Pb) free packages - TSSOP-20
Description
The FMS6690 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), Progressive Scan (PS),
and High Definition (HD) filters greatly simplify DVD video output
circuitry. Three channels offer fixed SD filters and feature an
additional muxed input, while the other three channels are
selectable between PS and HD filters. The FMS6690 offers a
fixed gain of 6dB.
The FMS6690 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
Ω
) video
loads. DC-coupling the outputs removes the need for output
coupling capacitors. The input DC levels will be offset approxi-
mately +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
6d
B
SD OUT1
SD IN2
SD IN3A
Transparent Clamp
6d
B
SD OUT2
Transparent Clamp
6d
B
SD OUT3
SD IN3B
MUXSEL A/B
PS/HD IN1
Transparent Clamp
8MHz, 6th order
6d
B
PS/HD OUT1
PS/HD IN2
Transparent Clamp
6d
B
PS/HD OUT2
PS/HD IN3
Transparent Clamp
6d
B
PS/HD OUT3
FcSEL PS/HD
Selectable
15/32MHz
6th order
FMS6690 Rev. 2B
1
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FMS6690 Six Channel, 6th Order SD/PS/HD Video Filter Driver
Pin Configuration
SD IN1
SD IN2
SD IN3A
SD IN3B
V
CC
F
cSEL
PS/HD IN1
PS/HD IN2
PS/HD IN3
N/C
Pin Assignments
20
19
SD OUT1
SD OUT2
SD OUT3
GND
GND
Mux
SEL
PS/HD OUT1
PS/HD OUT2
PS/HD OUT3
1
2
3
4
5
6
7
8
9
10
Pin
#
1
2
3
4
5
Pin
SD IN1
SD IN2
SD IN3A
SD IN3B
VCC
FcSEL
PS/HD IN1
PS/HD IN2
PS/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 3A
SD video input, channel 3B
+5V supply
Selects filter corner frequency for pins 7, 8, and
9. “0” = PS, “1” = HD
Selectable PS or HD video input, channel 1
Selectable PS or HD video input, channel 2
Selectable PS or HD video input, channel 3
No Connect
No Connect
FMS6690
20L TSSOP
18
17
16
15
14
13
12
11
6
7
8
9
N/C
10
11
12
13
14
15
16
17
18
19
20
PS/HD OUT3 Output Filtered PS or HD video output, channel 3
PS/HD OUT2 Output Filtered PS or HD video output, channel 2
PS/HD OUT1 Output Filtered PS or HD video output, channel 1
MUX
SEL
GND
GND
SD OUT3
SD OUT2
SD OUT1
Input
Input
Input
Mux selects between channel 3A and 3B inputs.
“0” = A, “1” = B
Must be tied to Ground
Must be tied to Ground
Output Filtered SD video output, channel 3
Output Filtered SD video output, channel 2
Output Filtered SD video output, channel 1
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
V
cc
+ 0.3
50
Unit
V
V
mA
Reliability Information
Parameter
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10s)
Thermal Resistance (Theta
JA
), 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
FMS6690 Rev. 2B
FMS6690 Six Channel, 6th Order SD/PS/HD Video Filter Driver
DC Electrical Characteristics
T
c
= 25˚C, V
cc
= 5V, R
source
= 37.5
Ω
, inputs AC coupled with 0.1
µ
F, all outputs AC coupled with 220
µ
F into
150
Ω
loads, referenced to 400kHz; unless otherwise noted.
Symbol
I
CC
V
in
V
il
V
ih
Parameter
Supply Current
1
Video Input Voltage Range
Digital Input Low
1
Digital Input
High
1
no load
Conditions
Referenced to GND, if DC-coupled
F
cSEL
F
cSEL
Min
Typ
60
1.4
Max
80
Units
mA
Vpp
0
2.4
0.8
V
V
V
cc
Standard Definition Electrical Characteristics
T
c
= 25˚C, V
in
= 1V
pp
, V
cc
= 5V, R
source
= 37.5
Ω
, all inputs AC coupled with 0.1
µ
F, all outputs AC coupled
with 220
µ
F into 150
Ω
loads, referenced to 400kHz; unless otherwise noted.
Symbol
AV
SD
f
1dBSD
f
cSD
f
SBSD
DG
DP
THD
X
TALKSD
SNR
t
pdSD
Parameter
Channel Gain
1
-1dB Bandwidth
1
-3dB Bandwidth
1
Conditions
All SD Channels
All SD Channels
All SD Channels
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
Attenuation(stopband reject)
1
All SD Channels at f = 27MHz
Differential Gain
Differential Phase
Output Distortion
Crosstalk (ch-to-ch)
Signal-to-Noise Ratio
2
Propagation Delay
All SD Channels
All SD Channels
V
OUT
= 1.4V
pp
, 3.58MHz
at 1MHz
NTC-7 weighting, 100kHz to 4.2MHz
Delay from input to output, 4.5MHz
Progressive Scan Electrical Characteristics
T
c
= 25˚C, V
in
= 1V
pp
, V
cc
= 5V, R
source
= 37.5
Ω
, F
cSEL
= 0, all inputs AC coupled with 0.1
µ
F, all outputs AC
coupled with 220
µ
F into 150
Ω
loads, referenced to 400kHz; unless otherwise noted.
Symbol
AV
PS
f
1dBSPS
f
cPS
f
SBPS
THD
X
TALKPS
SNR
t
pdPS
Parameter
Channel Gain
1
-1dB Bandwidth
1
-3dB Bandwidth
1
Conditions
All PS Channels
All PS Channels
All PS Channels
Min
5.6
12
13
37
Typ
6.0
14
16
45
0.35
-53
66
47
Max
6.4
Units
dB
MHz
MHz
dB
%
dB
dB
ns
Attenuation(stopband reject)
1
All PS Channels at f = 54MHz
Output Distortion (All PS
channels)
Crosstalk (ch-to-ch)
Signal-to-Noise Ratio
2
Propagation Delay
V
OUT
= 1.4V
pp
, 7MHz
at 1MHz
unweighted; 100kHz to 15MHz
Delay from input to output
Notes:
1. 100% tested at 25˚C
2. SNR = 20 * log (714mV/rms noise)
FMS6690 Rev. 2B
3
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FMS6690 Six Channel, 6th Order SD/PS/HD Video Filter Driver
High Definition Electrical Characteristics
T
c
= 25˚C, V
in
= 1V
pp
, V
cc
= 5V, R
source
= 37.5
Ω
, F
cSEL
= 1, all inputs AC coupled with 0.1
µ
F, all outputs AC
coupled with 220
µ
F into 150
Ω
loads, referenced to 400kHz; unless otherwise noted
Symbol
AV
HD
f
1dBHD
f
cHD
f
SBHD
THD
X
TALKHD
SNR
t
pdHD
Parameter
Channel Gain
1
-1dB Bandwidth
1
-3dB Bandwidth
1
Attenuation(stopband
reject)
1
Conditions
All HD Channels
All HD Channels
All HD Channels
All HD Channels at f = 74.25MHz
V
OUT
= 1.4V
pp
, 22MHz
at 1MHz
unweighted, 100kHz to 30MHz
Delay from input to output
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
Output Distortion (all HD
channels)
Crosstalk (ch-to-ch)
Signal-to-Noise
Ratio
2
Propagation Delay
Notes:
1. 100% tested at 25˚C
2. SNR = 20 * log (714mV/rms noise)
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4
FMS6690 Rev. 2B
FMS6690 Six Channel, 6th Order SD/PS/HD Video Filter Driver
Typical Performance Characteristics
T
c
= 25˚C, V
in
= 1V
pp
, V
CC
= 5V, R
source
= 37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with
220µF into 150Ω 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. PS Gain vs. Frequency
-20
5
0
-30
-5
-40
-10
-15
-50
-20
-60
-25
-30
-70
-35
-80
-40
-45
-90
400kHz
0.1
10
20
1 30
40
50
10
60
30
Figure 4. PS Flatness vs. Frequency
0.8
-30
0.7
-40
0.6
0.5
-50
0.4
0.3
-60
0.2
-70
0.1
Using 0.1µF and 0.01µF
Bypass Capacitors as suggested
Normalized Gain (dB)
PSRR (dB)
Normalized Gain (dB)
PSRR (dB)
0
-80
-0.1
-0.2
-90
400kHz
0.1
2
4
61
8
10
10
12
14
30
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
Figure 5. HD Gain vs. Frequency
5
0
Figure 6. HD Flatness vs. Frequency
1.0
0.9
Normalized Gain (dB)
Normalized Gain (dB)
20
30
40
50
60
70
80
-5
-10
-15
-20
-25
-30
-35
-40
400kHz 10
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
5
10
15
20
25
30
-0.1
400kHz
Frequency (MHz)
Frequency (MHz)
FMS6690 Rev. 2B
5
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