TPF141
Full-HD Composite Video Filter Driver
Features
Description
Single FHD Video Filter Support HDCVI-1080p
/1080i/720p, VGA/SVGA/XGA
Optimized 6th-order Butterworth Video reconstruction
filter:
FHD Channel: -3dB ≥ 72MHz
Support Multiple Input Biasing:
- Provide 80-mV Level-Shift when DC-Coupled
- Transparent Input Clamping when AC-Coupled
- Support External DC Biasing when AC-Coupled
Very Low Quiescent Current: 11.5 mA(at 3.3V, Typical)
6dB Gain(2V/V), Rail TO Rail Output
AC- or DC-Coupled Output Driving Dual Video Loads
(75Ω)
Wide Power Supply: +3.0V to +5.5V Single Supply
Robust ESD Protection:
Robust 8kV – HBM and 2kV – CDM ESD Rating
Green Product, SOT23-6 Package
Applications
Video Signal Amplification
Set-Top Box Video Driver
PVR、DVD Player Video Buffer
Video Buffer for Portable or USB-Powered Video
Devices
HDTV
TPF141 is a specially designed for consumer applications,
high-performance, low-cost video reconstruction filter, it
combine excellent video performance and low power
consumption perfectly. It incorporates one Full high-definition
(FHD) filter channels. The filter feature sixth-order
Butterworth characteristics that are useful as digital-to-analog
converter (DAC) reconstruction filters or as analog-to-digital
converter (ADC) anti-aliasing filters. The FHD filters can be
bypassed to support filters. The FHD filters can be bypassed
to support 1080p60 video or up to quad extended graphics
array (QXGA) RGB video.
As part of the TP141 flexibility, the input can be configured
for ac- or dc-coupled inputs. The 84-mV output level shift
allows for a full sync dynamic range at the output with 0-V
input. The ac-coupled modes include a transparent sync-tip
clamp option for Y', and G'B'R' signals. AC- coupled biasing
for C'/P'B/P'R channels can easily be achieved by adding an
external resistor to VS+.
The TP141 rail-to-rail output stage with 6-dB gain allows for
both ac and dc line driving. The ability to drive two lines, or
75-Ω loads, allows for maximum flexibility as a video line
driver. The 11.5-mA total quiescent current at 3.3 V makes it
an excellent choice for power-sensitive video applications.
TPF141 is available in SOT23-6 package. Its operation
temperature range is from −40°C to +85°C.
Related Resources
AN-1201: Application notes of TPF1xx
Function Block
Figure 1.
Rev. A
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©2013 3PEAK INCORPORATED
TPF141
Full-HD Composite Video Filter Driver
Order Information
Operating
Order Number
Temperature
Package
Range
TPF141-TR
-40 to 85°C
SOT23-6
Marking
Transport Media,
Information
Quantity
F41
Tape and Reel, 3000
Pin configuration (Top View)
Pin Name
FHD IN
Pin Function
Full-HD video input, LPF = 72 MHz
+VS
Positive Power Supply
GND
Ground
FHD OUT
Full-HD video output, LPF = 72 MHz
NC
No Connection
Figure 2.
Absolute Maximum Ratings*
VIN
IO
TJ
TA
TSTG
TL
* Note:
Parameters
Power Supply, VDD to GND
Input Voltage
Output Current
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering 10 sec)
Value
Units
6.0
V
VDD + 0.3V to GND - 0.3V
65
IO
150
TJ
–45 to 85
TA
–65 to 150
TSTG
300
TL
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure
to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.
(1) This data was taken with the JEDEC low effective thermal conductivity test board.
(2) This data was taken with the JEDEC standard multilayer test boards.
ESD, Electrostatic Discharge Protection
Symbol
Parameter
Condition
HBM
Human Body Model ESD
CDM
Charged Device Model ESD JEDEC-EIA/JESD22-C101E
©2014 3PEAK INCORPORATED
MIL-STD-883H Method 3015.8
~ 2 ~
Minimum
Level
Unit
8
kV
2
kV
Rev. A
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TPF141
Full-HD Composite Video Filter Driver
Electrical Characteristics All test condition is VDD = 3.3V, TA = +25°C, RL = 150Ω to GND, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
Input Electrical Specifications
VDD
Supply Voltage Range
3.0
ICC
Quiescent current (IQ)
VOLS
Output Level Shift Voltage
VIN = 0V, no load, input referred
ICLAMP-DOWN
Clamp Discharge Current
ICLAMP-UP
VDD = 3.3V, VIN = 500mV, no load
11.5
14.27
mA
VDD = 5.0V, VIN = 500mV, no load
15
18.53
mA
53
80
124
mV
VIN=300mV, measure current
1.1
2.0
5.3
μA
Clamp Charge Current
VY = -0.2V
-1.5
-1.7
VCLAMP
Input Voltage Clamp
IY = -100μA
-40
0
+40
mV
AV
Voltage Gain
5.9
6.01
6.03
dB
PSRR
Power Supply Rejection Ratio
VOL
Output Voltage Low Swing
VIN = -0.3V, RL =75Ω
VOH
Output Voltage High Swing
VIN = 3V, RL =75Ω to GND (dual load)
3
ISC
Short-circuit current
VIN = 2V, 10Ω, output to GND
65
mA
VIN =0.1V, output short to VDD
65
mA
VIN=0.5V,1V or 2V
RL=150Ω to GND
ΔVDD = 3.3V to 3.6V
ΔVDD = 5.0V to 5.5V, 50Hz
mA
61
dB
67
dB
0.05
0.1
V
3.05
3.1
V
AC Electrical Specifications
f-1dB
-1dB Bandwidth
RL=150Ω
53.1
63.2
72.9
MHz
f-3dB
-3dB Bandwidth
RL=150Ω
63.7
71.5
80.1
MHz
Att148MHz
Stop Band Attenuation
f =148MHz
34
39
dB
SR
Slew Rate
2V output step, 80% to 20%
300
V/μs
dG
Differential Gain
Video input range 1V
0.1
1
%
dP
Differential Phase
Video input range 1V
0.3
0.6
°
THD
Total Harmonic Distortion
f=10MHz, VOUT=1.4VPP
0.15
%
f=22MHz, VOUT=1.4VPP
0.6
%
D/DT
Group Delay Variation
f = 100kHz to 27MHz
2.5
ns
6.0
ns
tPD
Propagation Delay
XTALK
Channel Crosstalk
f = 100kHz to 60MHz
Maximum delay from input to output: (100kHz to
60MHz)
f = 1MHz, VOUT=1.4VPP
SNR
Signal-to-Noise Ration
ROUT_AC
Output Impedance
Rev. A
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11.0
ns
-74
dB
f= 100kHz to 60MHz
64
dB
f = 10MHz
0.5
Ω
~3~
-68
18.0
©2014 3PEAK INCORPORATED
TPF141
Full-HD Composite Video Filter Driver
Typical Performance Characteristics All test condition is VDD = 3.3V, TA = +25°C, RL =
1
5
0.8
4
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
150Ω to GND, unless otherwise noted.
0.6
0.4
0.2
0
-0.2
-0.1dB@50MHz
-0.4
VDD =3.3V
RL =150Ω
CL =15pF
-0.6
-0.8
-1
100k
3
2
1
0
-1
-3dB@72MHz
-2
VDD =3.3V
RL =150Ω
CL =15pF
-3
-4
1M
10M
FREQUENCY (Hz)
-5
100k
100M
Figure3. Small-Scale Frequency Response
1M
10M
FREQUENCY (Hz)
100M
Figure4. Large-Scale Frequency Response
0
5
-100
3
2
CL =15pF
1
CL =5pF
PHASE (O)
NORMALIZED GAIN (dB)
4
0
-1
CL =20p
-2
-3
-4
-300
-400
VDD =3.3V
RL =150Ω
CL =15pF
-500
VDD =3.3V
RL =150Ω
-5
100k
-200
1M
10M
FREQUENCY (Hz)
-600
100k
100M
40.0
10
NORMALIZED GAIN (dB)
GROUP DELAY (ns)
35.0
30.0
25.0
20.0
15.0
10.0
0.0
-5.0
100M
Figure6. Gain Vs. Frequency
Figure5. Gain Vs. Frequency With CLOAD
5.0
1M
10M
FREQUENCY (Hz)
VDD =3.3V
RL =150Ω
CL =15pF
0
-10
-20
148MHz, -39dB
-30
-40
-50
VDD =3.3V
RL =150Ω
CL =15pF
-60
-10.0
1M
10M
100M
FREQUENCY (Hz)
1M
1G
Figure7. Group Delay vs Frequency
©2014 3PEAK INCORPORATED
10M
100M
FREQUENCY (Hz)
Figure8. Stop Band Attenuation
~ 4 ~
Rev. A
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1G
TPF141
Full-HD Composite Video Filter Driver
0
VDD =3.3V
-10
45
40
CURRENT (mA)
PSSR (dB)
-20
-30
-40
-50
-60
35
30
25
20
15
10
-70
5
0
3.0
-80
1k
10k
100k
1M
FREQUENCY (Hz)
10M
100M
Figure9. PSRR Vs. Frequency
4.0
4.5
5.0
SUPPLY VOLTAGE (V)
5.5
Figure10. Current Vs. Supply Voltage
0.9
2.0
0.8
1.5
AMPLITUDE (V)
AMPLITUDE (V)
3.5
VDD =+3.3V
RL =100Ω
VOUT=1VP-P
1.0
0.5
VDD =+3.3V
RL =100Ω
VOUT=200mVP-P
0.7
0.6
0.5
tRISE=7.75ns
tRISE=3.25ns
tFALL =7.41ns
0.0
tFALL =3.59ns
0.4
0
20
40
60
80
100
TIME (ns)
120
140
160
0
Figure11. Large-Signal Pulse Response Vs. Time
Rev. A
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20
40
60
80 100
TIME (ns)
120
140
160
Figure12. Small-Signal Pulse Response Vs. Time
~5~
©2014 3PEAK INCORPORATED
TPF141
Full-HD Composite Video Filter Driver
Application Information
The TPF141 is targeted for systems that require one full
high-definition (FHD) video outputs. Although it can be
used for numerous other applications, the needs and
requirements of the video signal are the most important
design parameters of the TPF141. The TPF141
incorporates many features not typically found in
integrated video parts while consuming very low power.
Internal Sync Clamp
The typical embedded video DAC operates from a
ground referenced single supply. This becomes an
issue because the lower level of the sync pulse output
may be at a 0V reference level to some positive level.
The problem is presenting a 0V input to most single
supply driven amplifiers will saturate the output stage
of the amplifier resulting in a clipped sync tip and
degrading the video image. A larger positive reference
may offset the input above its positive range.
The TPF141 features an internal sync clamp and
offset function to level shift the entire video signal to
the best level before it reaches the input of the
amplifier stage. These features are also helpful to
avoid saturation of the output stage of the amplifier by
setting the signal closer to the best voltage range.
The simplified block diagram of the TPF141 in
Figure-1. The AC coupled video sync signal is pulled
negative by a current source at the input of the
comparator amplifier. When the sync tip goes below
the comparator threshold the output comparator is
driven negative, The PMOS device turns on clamping
sync tip to near ground level. The network triggers on
the sync tip of video signal.
Droop Voltage and DC
Restoration
Selection of the input AC-coupling capacitance is
based on the system requirements. A typical sync tip
width of a 64μs NTSC line is 4μs during which clamp
circuit restores its DC level. In the remaining 60μs
period, the voltage droops because of a small
constant 2.0μA sinking current. If the AC-coupling
capacitance is 0.1μF, the maximum droop voltage is
©2014 3PEAK INCORPORATED
about 1mV which is restored by the clamp circuit. The
maximum pull-up current of the clamp circuit is 1.7mA.
For a 4μs sync tip width and 0.1μF capacitor, the
maximum restoration voltage is about 80mV.
The line droop voltage will increase if a smaller
AC-coupling capacitance is used. For the same
reason, if larger capacitance is used the line droop
voltage will decrease. Table 1 is droop voltage and
maximum restoration voltage of the clamp for typical
capacitance.
Table 1.
Maximum restoration voltage and droop voltage
of Y signals for different capacitance
CAP VALUE
(nF)
100
1,000
DROOP IN 60μs
(mV)
1.2
0.12
CHARGE IN 4μs
(mV)
68
6.8
Low Pass Filter--Sallen Key
The Sallen Key is a classic low pass configuration.
This provides a very stable low pass function, and in
the case of the TPF141, the six-pole roll-off at around
72MHz. The six-pole function is accomplished with an
RC low pass network placed in series with and before
the Sallen Key.
Output Couple
TPF141 output could support both “AC Couple” and
“DC Couple”, if use “AC Couple”, this capacitor is
typically between 220-μF and 1000-μF, although
470-μF is common. This value of this capacitor must
be this large to minimize the line tilt (droop) and/or
field tilt associated with ac-coupling as described
previously in this document.
The TPF141 internal sync clamp makes it possible to
DC couple the output to a video load, eliminating the
need for any AC coupling capacitors, thereby saving
board space and additional expense for capacitors.
This makes the TPF141 extremely attractive for
portable video applications. Additionally, this solution
completely eliminates the issue of field tilt in the lower
frequency. The trade off is greater demand of supply
current. Typical load current for AC coupled is around
1mA, compared to typical 6.6mA used when DC
~ 6 ~
Rev. A
www.3peakic.com
TPF141
Full-HD Composite Video Filter Driver
coupling.
PDMAX =Vs I SMAX +(Vs VOUT)
Output Drive Capability and
Power Dissipation
Where:
VS = Supply voltage
ISMAX = Maximum quiescent supply current
VOUT = Maximum output voltage of the application
RLOAD = Load resistance tied to ground
With the high output drive capability of the TPF141, it
is possible to exceed the +125°C absolute maximum
junction temperature under certain load current
conditions. Therefore, it is important to calculate the
maximum junction temperature for an application to
determine if load conditions or package types need to
be modified to assure operation of the amplifier in a
safe operating area. The maximum power dissipation
allowed in a package is determined according to
Equation:
PDMAX =
VOUT
RL
By setting the two PDMAX equations equal to each
other, we can solve the output current and RLOAD to
avoid the device overheat.
Power Supply Bypassing Printed
Circuit Board Layout
As with any modern operational amplifier, a good
printed circuit board layout is necessary for optimum
performance. Lead lengths should be as short as
possible. The power supply pin must be well bypassed
to reduce the risk of oscillation. For normal single
supply operation, a single 4.7μF tantalum capacitor in
parallel with a 0.1μF ceramic capacitor from VS+ to
GND will suffice.
TJMAX TAMAX
JA
Where:
TJMAX = Maximum junction temperature
TAMAX = Maximum ambient temperature
ΘJA = Thermal resistance of the package
The maximum power dissipation actually produced by
an IC is the total quiescent supply current times the
total power supply voltage, plus the power in the IC
due to the load, or: for sourcing:
VIDEO FILTER DRIVER SELECTION GUIDE
P/N
Product Description
TPF110
/TPF110L
Low power, enable function and
Channel
-3dB Bandwidth
Package
1-SD
9MHz
SC70-5
SOT23-6
3-SD
9MHz
SO-8
4-SD
9MHz
MSOP-10
TSSOP-14
6-SD
9MHz
TSSOP-14
3-ED
13.5MHz
SO-8
3-HD
36MHz
SO-8
1-SD&
3-SD
9MHz
36MHz
MSOP-10
TSSOP-14
th
SAG correction, 1 channel 6 order
9MHz
TPF113
Low power 3 channel, 6th-order
9MHz SD video filter
TPF114
Low power 4 channel, 6th-order
9MHz SD video filter
TPF116
Low power 4 channel, 6th-order
9MHz SD video filter for CVBS,
SVIDEO
TPF123
3 channel 6th-order 13.5MHz,
960H/720H-CVBS video filter or
Y’Pb’Pr 480P/576P video filter
TPF133
Low power 3 channel, 6th-order
36MHz HD video filter
TPF134
Low power 3 channel, 6th-order
36MHz HD video filter and 1 channel
Rev. A
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~7~
©2014 3PEAK INCORPORATED
TPF141
Full-HD Composite Video Filter Driver
SD video filter
TPF136
Low power 3 channel, 6th-order
36MHz HD video filter and 3 channel
3-SD&
3-HD
9MHz
36MHz
TSSOP-20
3-FHD
72MHz
SO-8
1-SD&
3-FHD
9MHz
72MHz
MSOP-10
TSSOP-14
3-SD&
3-FHD
9MHz
72MHz
TSSOP-20
3-CH
220MHz
SO-8
SD video filter
TPF143
Low power 3 channel, 6th-order
72MHz Full HD video filter
TPF144
Low power 3 channel, 6th-order
72MHz Full HD video filter and 1
channel SD video filter
TPF146
Low power 3 channel, 6th-order
72MHz Full HD video filter and3
channel SD video filter
TPF153
Low power 3 channel, 6th-order
220MHz Full HD video filter
©2014 3PEAK INCORPORATED
~ 8 ~
Rev. A
www.3peakic.com
TPF141
Full-HD Composite Video Filter Driver
Package Outline Dimensions
SOT23-6
Symbol
Dimensions
Dimensions
In Millimeters
In Inches
Min
Max
Min
Max
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.400
0.012
0.016
D
2.820
3.020
0.111
0.119
E
1.500
1.700
0.059
0.067
E1
2.650
2.950
0.104
0.116
e
Rev. A
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~9~
0.950TYP
0.037TYP
e1
1.800
2.000
0.071
0.079
L1
0.300
0.460
0.012
0.024
θ
0°
8°
0°
8°
©2014 3PEAK INCORPORATED
TPF141
Full-HD Composite Video Filter Driver
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Contact information:
USA: 635 W. Alma School Road, Suite102
Chandler, USA.
AZ 85234
Shanghai-China: Room 401-407 No.1278 Keyuan Road,
Zhangjiang High-tech Park, Pudong New District,
Shanghai, China
Zip Code: 201203
Suzhou-China: Suite 304, Building B2, Creative Industrial Park,
No.328 Xinghu Street, Industrial Park,
Suzhou, Jiangsu Province, China
Zip Code: 215123
©2014 3PEAK INCORPORATED
~ 10 ~
Rev. A
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