ANALOG DEVICES ADA4412-3 Service Manual

Integrated Triple Video Filter with Selectable

T

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FEATURES

Sixth-order adjustable video filters

36 MHz, 18 MHz, and 9 MHz
Many video standards supported: RGB, YPbPr, YUV, SD, Y/C
Ideal for 720p and 1080i resolutions

−1 dB bandwidth of 31.5 MHz for HD

Low quiescent power

Only 265 mW for 3 channels on 5 V supply

Disable feature cuts supply current to 10 μA
DC output offset adjust: ±0.5 V, input referred
Fixed throughput gain of ×2
Excellent video specifications
Wide supply range: +4.5 V to ±5 V
Rail-to-rail output

Output can swing 4.5 V p-p on single 5 V supply
Small packaging: 20-lead QSOP

APPLICATIONS

Set-top boxes
DVD players and recorders
Personal video recorders
HDTVs
Projectors

GENERAL DESCRIPTION

Cutoff Frequencies for RGB, HD/SD

ADA4412-3

FUNCTIONAL BLOCK DIAGRAM

Y/G IN

Pb/B IN

Pr/R IN

LEVEL1
LEVEL2

CUTOFF S E LECT

DISABLE

×1

×1

×1

DC
OFFSET

2

36MHz, 18MHz, 9MHz

36MHz, 18MHz, 9MHz

36MHz, 18MHz, 9MHz

ADA4412-3

Figure 1.

×2

×2

×2

Y/G OUT

Pb/B OU

Pr/R OUT

05528-001

The ADA4412-3 is a comprehensive filtering solution designed
to give designers the flexibility to easily filter and drive various
video signals, including high definition video. Cutoff frequen­cies of the sixth-order video filters range from 9 MHz to
36 MHz and can be selected by two logic pins to obtain four
filter combinations that are tuned for RGB, high definition, and
standard definition video signals. The ADA4412-3 has a rail-to­rail output that can swing 4.5 V p-p on a single 5 V supply.

The ADA4412-3 includes an output offset voltage adjustment
fe

ature. Output voltage offset is continuously adjustable over an
input-referred range of ±500 mV by applying a differential
voltage to an independent offset control input.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.

The ADA4412-3 can operate on a single +5 V supply as

ell as on ±5 V supplies. Single-supply operation is ideal in

w
applications where power consumption is critical. The disable
feature allows for further power conservation by reducing the
supply current to typically 10 µA when a particular device is not
in use.

Dual-supply operation is best for applications where the
ne

gative-going video signal excursions must swing at or below
ground while maintaining excellent video performance. The
output buffers have the ability to drive two 75 Ω doubly
terminated cables that are either dc-coupled or ac-coupled.

The ADA4412-3 is available in a 20-lead QSOP and is rated for

peration over the extended industrial temperature range of

o

−40°C to +85°C.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

ADA4412-3

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TABLE OF CONTENTS

Features .............................................................................................. 1

Applications..................................................................................... 10

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution.................................................................................. 5

Pin Configuration And Function Descriptions............................ 6

Typical Performance Characteristics ............................................. 7

Theory of Operation ........................................................................ 9

REVISION HISTORY

7/05—Revision 0: Initial Version

Overview ..................................................................................... 10

Disable ......................................................................................... 10

Cutoff Frequency Selection ....................................................... 10

Output DC Offset Control........................................................ 10

Input and Output Coupling ...................................................... 11

Printed Circuit Board Layout ................................................... 11

Video Encoder Reconstruction Filter...................................... 11

Outline Dimensions ....................................................................... 13

Ordering Guide .......................................................................... 13

Rev. 0 | Page 2 of 16

ADA4412-3

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SPECIFICATIONS

VS = 5 V, @ TA = 25°C, VO = 1.4 V p-p, RL = 150 Ω, unless otherwise noted.

Table 1.

Parameter Test Conditions/Comments Min Typ Max Unit

OVERALL PERFORMANCE

Offset Error Input referred, all channels 9 23 mV
Offset Adjust Range Input referred ±500 mV
Input Voltage Range, All Inputs VS− − 0.1 VS+ − 2.0 V
Output Voltage Swing, All Outputs Positive swing VS+ − 0.30 VS+ − 0.20 V
Negative swing VS− + 0.10 VS− + 0.15 V
Linear Output Current per Channel 30 mA
Integrated Voltage Noise, Referred to Input All channels 0.50 mV rms
Filter Input Bias Current All channels 6.6 μA
Total Harmonic Distortion at 1 MHz FC = 36 MHz, FC = 18 MHz/FC = 9 MHz 0.01/0.04 %
Gain Error Magnitude 0.09 0.49 dB

FILTER DYNAMIC PERFORMANCE

−1 dB Bandwidth Cutoff frequency select = 36 MHz 26.5 31.5 MHz
Cutoff frequency select = 18 MHz 13.5 15.5 MHz
Cutoff frequency select = 9 MHz 6.5 8.0 MHz

−3 dB Bandwidth Cutoff frequency select = 36 MHz 34 37 MHz
Cutoff frequency select = 18 MHz 16 19 MHz
Cutoff frequency select = 9 MHz 8 9 MHz
Out-of-Band Rejection f = 75 MHz −31 −43 dB
Crosstalk f = 5 MHz, FC = 36 MHz −62 dB
Propagation Delay f = 5 MHz, FC = 36 MHz 19 ns
Group Delay Variation Cutoff frequency select = 36 MHz 7 ns
Cutoff frequency select = 18 MHz 14 ns
Cutoff frequency select = 9 MHz 27 ns
Differential Gain NTSC, FC = 9 MHz 0.16 %
Differential Phase NTSC, FC = 9 MHz 0.05 Degrees

CUTOFF CONTROL INPUT PERFORMANCE

Input Logic 0 Voltage 0.8 V
Input Logic 1 Voltage 2.0 V
Input Bias Current 10 15 μA

DISABLE PERFORMANCE

DISABLE Assert Voltage VS+ − 0.5 V
DISABLE Assert Time 100 ns
DISABLE Deassert Time 130 ns
DISABLE Input Bias Current 12 μA
Input-to-Output Isolation—Disabled f = 10 MHz 90 dB

POWER SUPPLY

Operating Range 4.5 12 V
Quiescent Current 53 56 mA
Quiescent Current—Disabled 10 150 μA
PSRR, Positive Supply All channels 64 70 dB
PSRR, Negative Supply All channels 58 60 dB

Rev. 0 | Page 3 of 16

ADA4412-3

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VS = ±5 V, @ TA = 25°C, VO = 1.4 V p-p, RL = 150 Ω, unless otherwise noted.

Table 2.

Parameter Test Conditions/Comments Min Typ Max Unit

OVERALL PERFORMANCE

Offset Error Input referred, all channels 10 25 mV

Offset Adjust Range Input referred ±500 mV

Input Voltage Range, All Inputs VS− − 0.1 VS+ − 2.0 V

Output Voltage Swing, All Outputs Positive swing VS+ − 0.33 VS+ − 0.24 V

Negative swing VS− + 0.24 VS− + 0.33 V

Linear Output Current per Channel 30 mA

Integrated Voltage Noise, Referred to Input All channels 0.50 mV rms

Filter Input Bias Current All channels 6.3 μA

Total Harmonic Distortion at 1 MHz FC = 36 MHz, FC = 18 MHz/FC = 9 MHz 0.01/0.03 %

Gain Error Magnitude 0.04 0.50 dB
FILTER DYNAMIC PERFORMANCE

−1 dB Bandwidth Cutoff frequency select = 36 MHz 30.0 MHz

Cutoff frequency select = 18 MHz 15.5 MHz

Cutoff frequency select = 9 MHz 8.0 MHz

−3 dB Bandwidth Cutoff frequency select = 36 MHz 34 36 MHz

Cutoff frequency select = 18 MHz 17 19 MHz

Cutoff frequency select = 9 MHz 8 9 MHz

Out-of-Band Rejection f = 75 MHz −31 −42 dB

Crosstalk f = 5 MHz, FC = 36 MHz −62 dB

Propagation Delay f = 5 MHz, FC = 36 MHz 19 ns

Group Delay Variation Cutoff frequency select = 36 MHz 7 ns

Cutoff frequency select = 18 MHz 12 ns

Cutoff frequency select = 9 MHz 24 ns

Differential Gain NTSC, FC = 9 MHz 0.04 %

Differential Phase NTSC, FC = 9 MHz 0.16 Degrees
CUTOFF CONTROL INPUT PERFORMANCE

Input Logic 0 Voltage 0.8 V

Input Logic 1 Voltage 2.0 V

Input Bias Current 10 15 μA
DISABLE PERFORMANCE

DISABLE Assert Voltage VS+ − 0.5 V

DISABLE Assert Time 75 ns

DISABLE Deassert Time 125 ns

DISABLE Input Bias Current 35 μA

Input-to-Output Isolation—Disabled f = 10 MHz 90 dB
POWER SUPPLY

Operating Range 4.5 12 V

Quiescent Current 57 60 mA

Quiescent Current—Disabled 10 150 μA

PSRR, Positive Supply All channels 66 74 dB

PSRR, Negative Supply All channels 59 62 dB

Rev. 0 | Page 4 of 16

ADA4412-3

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ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter Rating

Supply Voltage 12 V
Power Dissipation See Figure 2
Storage Temperature –65°C to +125°C
Operating Temperature Range –40°C to +85°C
Lead Temperature Range (Soldering 10 sec) 300°C
Junction Temperature 150°C

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, θJA is
specified for device soldered in circuit board for surface-mount
packages.

Table 4. Thermal Resistance

Package Type θ

20-Lead QSOP 83 °C/W

JA

Maximum Power Dissipation

The maximum safe power dissipation in the ADA4412-3
package is limited by the associated rise in junction temperature
(T

) on the die. At approximately 150°C, which is the glass

J

transition temperature, the plastic changes its properties.
Even temporarily exceeding this temperature limit may change
the stresses that the package exerts on the die, permanently
shifting the parametric performance of the ADA4412-3.
Exceeding a junction temperature of 150°C for an extended
period can result in changes in the silicon devices potentially
causing failure.

Unit

The power dissipated in the package (P
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (V
quiescent current (I
depends on the particular application. For each output, the
power due to load drive is calculated by multiplying the load
current by the associated voltage drop across the device. The
power dissipated due to all of the loads is equal to the sum of
the power dissipations due to each individual load. RMS
voltages and currents must be used in these calculations.

Airflow increases heat dissipation, effectively reducing θ
In addition, more metal directly in contact with the package
leads from metal traces, through-holes, ground, and power
planes reduces the θ

Figure 2 shows the maximum safe power dissipation in the

ackage vs. the ambient temperature for the 20-lead QSOP

p
(83°C/W) on a JEDEC standard 4-layer board. θ
approximations.

2.5

2.3

2.1

1.9

1.7

1.5

WATTS

1.3

1.1

0.9

0.7

0.5
–40 –20 0 20 40 60

Figure 2. Maximum Power Dissipation vs. Temperature for a 4-Layer Board

). The power dissipated due to load drive

S

.

JA

AMBIENT TEMP E R A TURE (°C)

) is the sum of the

D

) times the

S

values are

JA

.

JA

80

05528-002

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. 0 | Page 5 of 16