TPF1441C [3PEAK]

72M HD Composite Video Filter Driver with Clamped input Comparator;


型号：	TPF1441C
厂家：	3PEAK
描述：	72M HD Composite Video Filter Driver with Clamped input Comparator
文件：	总13页 (文件大小：1168K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Feartures

Description



Wide Power Supply: +3.0V to +5.5V Single Supply

The TPF1441C is a low power, 72M HD composite video

filter and comparator on a single chip. Drawing less than 11.5mA

supply current over the full operating temperature range,

TP1441C operates from a single 3.0V to 5.5V power supply.

TPF1441C integrates high-performance low-cost 72MHz

composite video reconstruction filter, however it has very low

power consumption. The filter is 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 HD filters can actually support

720p/1080p CVI/TVI/AHD platform. Moreover the filter can be

bypassed to support wider bandwidth video application.

The TPF1441C’s on-board comparator incorporates

3PEAK’s proprietary and patented design techniques to achieve

the ultimate combination of high-speed (68ns propagation delay

under 3.0~5.5V wide supply range) and low power consumption ,

The internal input hysteresis eliminates output switching due to

internal input noise voltage, reducing current draw. The PUSH-

PULL output supports rail-to-rail output swing, and interfaces

with CMOS/TTL logic.



Robust ESD Protection:



Robust 8kV – HBM and 2kV – CDM ESD Rating

Green Product, MSOP8/SOP8 Package

Video Filter:



HDTV Video Filter Support Composite 1080p/60

Optimized 6th-order Butterworth Video reconstruction filter：

HD Channel: -3dB BW 72MHz

Support Multiple Input Biasing:







Transparent Clamping for DC restoration

Provide 80-mV Level-Shift when DC-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)

Comparator:



Fast Response Time: 68 ns Propagation Delay

Offset Voltage: ± 3.0 mV Maximum

Internal Hysteresis Ensures Clean Switching

Push-Pull, CMOS/TTL Compatible Output

Same DC clamping circuit as video input.

TPF1441C is available in SOP-8 package (TPF1441C-SR)

and MSOP-8 package (TP1441C-VR). Its operation

temperature range is from −40°C to +85°C.

Applications



Video Signal Amplification

Related Resources

Set-Top Box Video Driver

PV、DVD Player Video Buffer

Video Buffer for Portable or USB-Powered Video Devices

HDTV

AN-1201: Application notes of TPF1XX

Pin Configuration (Top View)

Pin Name

Pin Function

AIN

DOUT

VREF

HD IN

+V_S

Non-Inverting Input of the Comparator

Comparator Output

AIN

VREF

DOUT

GND

Inverting Input of Comparator

HD video input, LPF = 72 MHz

Positive Power Supply

Ground

TPF1441C

HD OUT

MSOP 8

+Vs

HD IN

GND

HD OUT

HD video output, LPF = 72 MHz

Not connect

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Function Block

TPF1441C

Sync-Tip Clamp

( DC Restore)

+Vs

80mV

Level

Shift

HD Input

6dB

LPF

+Vs

6 - order

FHD Filter

VREF

AIN

DOUT

80mV

Level

Shift

Clamp for DC

Restore

+Vs

GND

Order Information

Order Number

Operating Temperature Range

Package

Marking Information

Transport Media, Quantity

-40 to 85°C

8-Pin SOP

TPF1441C-SR

TPF1441C-VR

TPF1441C

Tape and Reel, 4000

Tape and Reel, 3000

8-Pin MSOP

Absolute Maximum Ratings*

Parameters

Value

Units

Power Supply, V_DDto GND

6.0

V_IN

I_O

Input Voltage

Output Current

V_DD+ 0.3V to GND - 0.3V

°C

T_J

Maximum Junction Temperature

Operating Temperature Range

Storage Temperature Range

Lead Temperature (Soldering 10 sec)

8-Lead SOP

150

–45 to 85

–65 to 150

300

T_A

°C

T_STG

θ_JA

°C

158

°C/W

* Note: 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

Minimum Level

Unit

Human Body Model ESD

MIL-STD-883H Method 3015.8

JEDEC-EIA/JESD22-C101E

HBM

CDM

Charged Device Model ESD

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Electrical Characteristics-Video Filter Part

All test condition is VDD = 3.3V, TA = +25°C, RL = 150Ω to GND, unless otherwise noted.

SYMBOL

Input Electrical Specifications

V_DDSupply Voltage Range

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

3.0

5.5

14.27

18.53

4.8

V_DD= 3.3V, V_IN= 500mV, no load

V_DD= 5.0V, V_IN= 500mV, no load

V_IN=300mV, measure current

V_Y= -0.2V

11.5

2.0

-1.7

μA

I_DD

Quiescent current (I_Q) ⁽¹⁾

I_CLAMP-DOWN

I_CLAMP-UP

V_CLAMP

R_IN

Clamp Discharge Current

Clamp Charge Current

Input Voltage Clamp⁽²⁾

Input Impedance

0.6

-1.5

-40

0.5

MΩ

I_Y= -100μA

+40

0.5V < V_Y< 1V

V_IN=0.5V,1V or 2V

R_L=150Ω to GND

Voltage Gain

5.91

6.01

6.03

124

V_OLS

V_OL

Output Level Shift Voltage

Output Voltage Low Swing

Output Voltage High Swing

V_IN= 0V, no load, input referred

V_IN= -0.3V, R_L=75Ω

0.05

3.18

V_OH

V_IN= 3V, R_L=75Ω to GND (dual load)

ΔV_DD= 3.3V to 3.6V

PSRR

I_SC

Power Supply Rejection Ratio

Short-circuit current

ΔV_DD= 5.0V to 5.5V, 50Hz

V_IN= 2V, 10Ω, output to GND

V_IN=0.1V, output short to V_DD

V_IH

V_IL

t_ON

t_OFF

Disable Threshold

Enable Threshold

Enable Time

V_DD= 3.0V to 5.5V

1.6

V_DD= 3.0V to 5.5V

0.4

V_IN= 500mV, V_OUTto 1%

1000

Disable Time

AC Electrical Specifications

f_-1dB

f_-3dB

-1dB Bandwidth HD Channel

R_L=150Ω

MHz

53.1

63.7

63.2

71.5

0.4

72.9

80.1

HD Channel

-3dB Bandwidth

Differential Gain

Differential Phase

Video input range 1V

f=10MHz, V_OUT=1.4V_PP

f=22MHz, V_OUT= 1.4V_PP

f = 100kHz to 27MHz

0.7

0.15

Total Harmonic

Distortion

THD

HD Channel

0.6

2.2

Group

Delay

D/DT

Variation

f = 100kHz to 60MHz

f = 1MHz, V_OUT=1.4V_PP

6.0

-74

X_TALK

Channel Crosstalk

Signal-to-

-68

SNR

HD Channel

f= 100kHz to 60MHz

f = 10MHz

Noise Ration

R_{OUT_AC}

Output Impedance

0.5

*Note: (1). 100% tested at TA=25°C.

(2). Comparator Clamp has the same specification．

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Electrical Characteristics-Comparator Part

All test condition is VDD = 3.3V, TA = +25°C, VIN+ = VDD, VIN- = 1.2V, RPU=10kΩ, CL =15pF, unless otherwise noted.

SYMBOL

V_DD

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage

5.5

V_OS

Input Offset Voltage ^{Note 1}

V_CM= 1.2V

-3

±0.6

0.3

V_OSTC

V_HYST

Input Offset Voltage Drift ^{Note 1}

μV/°C

Input Hysteresis Voltage ^{Note 1}

Input Hysteresis Voltage Drift ^{Note 1}

V_HYSTTC

V_CM= 1.2V

μV/°C

I_B

Input Bias Current

Input Offset Current

Input Resistance

I_OS

R_IN

> 100

GΩ

Differential

C_IN

Input Capacitance

Common Mode

CMRR

V_CM

PSRR

V_OH

V_OL

Common Mode Rejection Ratio

Common-mode Input Voltage Range

Power Supply Rejection Ratio

High-Level Output Voltage

Low-Level Output Voltage

Output Short-Circuit Current

Quiescent Current per Comparator

Rising Time

V_CM= V_SSto V_DD

V_DD-0.2

V_SS+0.2

I_OUT=-1mA

I_OUT=1mA

V_DD-0.3

V_SS+0.3

I_SC

Sink or source current

μA

I_Q

t_R

Falling Time

t_F

Propagation Delay (Low-to-High)

Propagation Delay (High-to-Low)

Propagation Delay Skew

T_PD+

T_PD-

T_PDSKEW

Overdrive=100mV, V_IN-=1.2V

-4

Note 1: The input offset voltage is the average of the input-referred trip points. The input hysteresis is the difference between the

input-referred trip points.

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Typical Performance Characteristics-Video Filter Part

All test condition is VDD = 3.3V, TA = +25°C, RL = 150Ω to GND, unless otherwise noted.

-1

-3dB@72MHz

-2

V_DD=3.3V

-3

R_L=150Ω

-4

C_L=15pF

-5

100k

10M

100M

FREQUENCY (Hz)

Figure3. Small-Scale Frequency Response

Figure4. Large-Scale Frequency Response

0.8

0.6

0.4

0.2

-100

-200

-300

-400

-0.2

-0.1dB@50MHz

-0.4

V_DD=3.3V

-0.6

R_L=150Ω

-500 R_L=150Ω

C_L=15pF

-600

-0.8

C_L=15pF

-1

100k

10M

100M

100k

10M

100M

FREQUENCY (Hz)

Figure5. Gain Vs. Frequency With CLOAD

Figure6. Gain Vs. Frequency

Figure7. Group Delay vs Frequency

Figure8. Stop Band Attenuation

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Figure9. PSRR Vs. Frequency

Figure10. Current Vs. Supply Voltage

Figure11. Large-Signal Pulse Response Vs. Time

Figure12. Small-Signal Pulse Response Vs. Time

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Typical Performance Characteristics-Comparator Part

Propagation Delay Skew V.S. Overdrive Voltage

Propagation Delay V.S. Capacitor Loading

Propagation Delay Skew V.S. Capacitor Loading

Rising/Falling Time V.S. Capacitor Loading

Input Hysteresis Voltage V.S. Common Mode Voltage

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Application Information

The TPF1441C is targeted for systems that require 1 channel high-definition (HD) 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

TPF1441C. The TPF1441C 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 TPF1441C 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 TPF1441C is on Page-2. 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.

Comparator Internal Clamp

TPF1441C integrates a comparator, which supports UTC function monolithically. Because of the distortion of the control signal

transmitted over a long cable, the rising/falling edges would become slower and the amplitude would be attenuated. Furthermore the

DC component may be shifted due to inconsistent DC ground level between sending and receiving devices. In a traditional design,

the reference of the comparator needs to be manually changed accordingly. In order to solve this application problem, TPF1441C

implements a new feature on the input of comparator which clamps the bottom level of the input signal to 40.0 mV. Therefore, there

is no need to consider the DC shift issue when choosing reference level, making the choice of reference level easier. Note that, to

use this feature, the input must be AC-coupled and the capacitor selection is based on the control signal bandwidth. Typically a 0.1uF

capacitor is used..

VCC

Input with AC couple

Reference = 40mV +

Threshold

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

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

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 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.

CAP VALUE

(nF)

DROOP IN 60μs

(mV)

CHARGE IN 4μs

(mV)

100

1.2

1,000

0.12

6.8

Table 1. Maximum restoration voltage and droop voltage of Y signals for different capacitance

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 TPF1441C,

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

TPF1441C 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 TPF1441C 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 TPF1441C extremely

attractive for portable video applications. Additionally, this solution completely eliminates the issue of field tilt in the lower frequency.

The trade-off is the supply current could be bigger. Typical load current for AC coupled is around 1mA, compared to typical 11.5mA

used when DC coupling.

Output Drive Capability and Power Dissipation

With the high output drive capability of the TPF1441C, 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:

T_JMAXT_AMAX

PD_MAX

_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:

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

V_OUT

PD_MAX=V_s I_SMAX+（V_sV_OUT）

R_L

Where：

VS = Supply voltage

ISMAX = Maximum quiescent supply current

VOUT = Maximum output voltage of the application

RLOAD = Load resistance tied to ground

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.

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Video Filter Driver Selection Guide

P/N

Product Description

Channel

-3dB Bandwidth

Package

TPF110

Low power, enable function and SAG correction,

1 channel 6^thorder 9MHz

1-SD

9MHz

SC70-5，SOT23-6

/TPF110L

Low power 3 channel, 6th-order 9MHz SD video

filter

TPF113

TPF114

TPF116

TPF123

TPF133

TPF134

TPF136

TPF143

TPF144

TPF146

TPF153

3-SD

4-SD

9MHz

SO-8

MSOP-10,TSSOP-14

TSSOP-14

SO-8

Low power 4 channel, 6th-order 9MHz SD video

filter

Low power 4 channel, 6th-order 9MHz SD video

filter for CVBS, SVIDEO

6-SD

9MHz

3 channel 6th-order 13.5MHz, 960H/720H-CVBS

video filter or Y’Pb’Pr 480P/576P video filter

3-ED

13.5MHz

36MHz

Low power 3 channel, 6th-order 36MHz HD video

filter

3-HD

SO-8

Low power 3 channel, 6th-order 36MHz HD video

filter and 1 channel SD video filter

1-SD&,3-SD

3-SD&,3-HD

3-FHD

9MHz,36MHz

72MHz

MSOP-10,TSSOP-14

TSSOP-20

SO-8

Low power 3 channel, 6th-order 36MHz HD video

filter and 3 channel SD video filter

Low power 3 channel, 6th-order 72MHz Full HD

video filter

Low power 3 channel, 6th-order 72MHz Full HD

video filter and 1 channel SD video filter

1-SD&,3-FHD

3-SD&,3-FHD

3-CH

9MHz,72MHz

220MHz

MSOP-10,TSSOP-14

TSSOP-20

SO-8

Low power 3 channel, 6th-order 72MHz Full HD

video filter and3 channel SD video filter

Low power 3 channel, 6th-order 220MHz Full HD

video filter

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Package Outline Dimensions

SOIC-8

Dimensions

Dimensions In

Inches

In Millimeters

Symbol

Min

Max

Min

Max

1.350

0.100

1.350

0.330

0.190

4.780

3.800

5.800

1.750

0.250

1.550

0.510

0.250

5.000

4.000

6.300

0.053

0.004

0.053

0.013

0.007

0.188

0.150

0.228

0.069

0.010

0.061

0.020

0.010

0.197

0.157

0.248

1.270TYP

0.050TYP

0.400

0°

1.270

8°

0.016

0°

0.050

8°

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TPF1441C

72M HD Composite Video Filter Driver with Clamped input Comparator

Package Outline Dimensions

MSOP-8

Dimensions

Dimensions In Inches

In Millimeters

Symbol

Min

Max

1.200

0.200

0.970

Min

Max

0.047

0.008

0.038

0.800

0.000

0.760

0.031

0.000

0.030

0.30 TYP

0.15 TYP

3.100

0.65 TYP

3.100

0.012 TYP

0.006 TYP

0.114 0.122

2.900

0.026

2.900

4.700

0.410

0°

0.114

0.185

0.016

0°

0.122

0.201

0.026

6°

5.100

0.650

6°

3PEAK and the 3PEAK logo are registered trademarks of 3PEAK INCORPORATED. All

other trademarks are the property of their respective owners.

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TPF1441C [3PEAK]

相关型号：

TPF1441C-SR

TPF1441C-VR

TPF144U-TR

TPF2405D

TPF2405S

TPF2409D

TPF2409S

TPF2412D

TPF2412S

TPF2415D

TPF2415S

TPF45000-385