Integrated Triple Video Filter with Selectable Cutoff
Frequencies for GBR, HD/SD
Preliminary Technical Data
FEATURES
6
th
Order Adjustable Video Filters
36MHz, 18MHz, and 9MHz
Many video standards supported
GBR, YPbPr, YUV, SD, Y/C
DC Output Offset Adjust: ±0.5V, input referred
Fixed throughput gain of x2
Excellent Video Specifcations
Wide Supply Range
+4.5V to ±5V
Rail-to-Rail Output
Disable feature
Small Packaging: 20-lead QSOP
ADA4412-3
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS
Set Top Boxes
DVD Players and Recorder
Personal Video Recorders
HDTV
Projectors
Figure 1.
PRODUCT OVERVIEW
The ADA4412-3 is a comprehensive filtering solution that is
carefully designed to give designers the flexibility to easily filter
and drive various video signals, including high definition video.
Cutoff frequencies of the 6
th
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 includes an output offset voltage adjustment
feature. 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.
The ADA4412-3 can operate on a single +5V supply as well as
±5V supplies. Single supply operation is ideal in applications
where power consumption is critical. A disable feature allows
for further power conservation.
Dual supply operation is best for applications where the
negative-going video signal excursions must swing at or below
ground while maintaining excellent video performance. The
output buffers will have the ability to drive two 75 Ohm
terminated loads that are either DC or AC coupled.
The ADA4412-3 is available in the 20 pin QSOP, package and is
rated for operation over the commercial temperature range of -
40
º
to +85
º
C.
Rev. PrA
04/05/05
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other 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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
www.analog.com
Tel: 781.329.4700
Fax: 781.326.8703
© 2005 Analog Devices, Inc. All rights reserved.
ADA4412-3
TABLE OF CONTENTS
ADA4412-3—Specifications ........................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
Preliminary Technical Data
Pin Configurations And Functional Descriptions ........................6
Outline Dimensions ..........................................................................7
ESD Caution...................................................................................7
REVISION HISTORY
Revision History: Rev PrA Originated
04/05/2005
Rev. PrA | Page 2 of 7
Preliminary Technical Data
ADA4412-3—SPECIFICATIONS
V
S
= 5 V, @ T
A
= 25°C, V
O
= 1.4 V p-p, G = ×2, R
L
= 150 Ω, unless otherwise noted.
Table 1.
Parameter
OVERALL PERFORMANCE
Offset Error
Offset Adjust Range
Input Voltage Range, All Inputs
Output Voltage Range, All Outputs
Linear Output Current per Channel
Integrated Voltage Noise, Referred to Input
Filter Input Bias Current
Total Harmonic Distortion at 1 MHz
FILTER DYNAMIC PERFORMANCE
−1 dB Bandwidth
Test Conditions/Comments
Input referred, all channels
Input Referred
I
O
= 15 mA, positive swing
I
O
= 15 mA, negative swing
All channels
All channels
f
C
= 36 MHz, f
C
= 18 MHz/f
C
= 9 MHz
Cutoff frequency select = 36 MHz
Cutoff frequency select = 18 MHz
Cutoff frequency select = 9 MHz
Cutoff frequency select = 36 MHz
Cutoff frequency select = 18 MHz
Cutoff frequency select = 9 MHz
f = 75 MHz
f = 5 MHz, f
C
= 36 MHz
f = 16 MHz, f
C
= 36 MHz
Cutoff frequency select = 36 MHz
Cutoff frequency select = 18 MHz
Cutoff frequency select = 9 MHz
V
S−
− 0.1
V
S+
− 0.5
V
S−
+ 0.4
Min
Typ
10
±500
ADA4412-3
Max
Unit
mV
mV
V
V
V
mA
µV
rms
µA
%
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
ns
ns
ns
ns
V
S+
− 2.0
V
S+
− 0.25
V
S-
+ 0.12
30
500
6.6
0.01/0.07
30
15
8
36
18
9
−35
−68
20
8
15
26
0.8
−3 dB Bandwidth
Out-of-Band Rejection
Crosstalk
Propagation Delay
Group Delay Variation
CUTOFF CONTROL INPUT PERFORMANCE
Input Logic 0 Voltage
Input Logic 1 Voltage
Input Bias Current
DISABLE PERFORMANCE
DISABLE Assert Voltage
DISABLE Assert Time
DISABLE De-Assert Time
DISABLE Input Bias Current
Input-to-Output Isolation—Disabled
POWER SUPPLY
Operating Range
Quiescent Current
Quiescent Current—Disabled
PSRR, Positive Supply
PSRR, Negative Supply
2.0
7
V
S+
− 0.5
100
130
12
100
4.5
60
15
72
62
12
150
V
V
µA
V
ns
ns
µA
dB
V
mA
µA
dB
dB
All channels
All channels
Rev. PrA | Page 3 of 7
ADA4412-3
V
S
= ±5 V, @ T
A
= 25°C, V
O
= 1.4 V p-p, G = ×2, R
L
= 150 Ω, unless otherwise noted.
Table 2.
Parameter
OVERALL PERFORMANCE
Offset Error
Offset Adjust Range
Input Voltage Range, All Inputs
Output Voltage Range, All Outputs
Linear Output Current per Channel
Integrated Voltage Noise, Referred to Input
Filter Input Bias Current
Total Harmonic Distortion at 1 MHz
FILTER DYNAMIC PERFORMANCE
−1 dB Bandwidth
Test Conditions/Comments
Input referred, all channels
Input Referred
I
O
= 30 mA, positive swing
I
O
= 30 mA, negative swing
All channels
All channels
f
C
= 36 MHz, f
C
= 18 MHz/f
C
= 9 MHz
Cutoff frequency select = 36 MHz
Cutoff frequency select = 18 MHz
Cutoff frequency select = 9 MHz
Cutoff frequency select = 36 MHz
Cutoff frequency select = 18 MHz
Cutoff frequency select = 9 MHz
f = 75 MHz
f = 5 MHz, f
C
= 36 MHz
f = 5 MHz, f
C
= 36 MHz
Cutoff frequency select = 36 MHz
Cutoff frequency select = 18 MHz
Cutoff frequency select = 9 MHz
Preliminary Technical Data
Min
Typ
14
±500
Max
Unit
mV
mV
V
V
V
mA
µV
rms
µA
%
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
ns
ns
ns
ns
V
S−
− 0.1
V
S+
− 0.6
V
S−
+ 0.6
V
S+
− 2.0
V
S+
− 0.3
V
S−
+ 0.3
30
500
6.3
0.01/0.07
28
15
8
35.5
18
9.5
−32
−68
21
6
13
23
0.8
−3 dB Bandwidth
Out-of-Band Rejection
Crosstalk
Propagation Delay
Group Delay Variation
CUTOFF CONTROL INPUT PERFORMANCE
Input Logic 0 Voltage
Input Logic 1 Voltage
Input Bias Current
DISABLE PERFORMANCE
DISABLE Assert Voltage
DISABLE Assert Time
DISABLE De-Assert Time
DISABLE Input Bias Current
Input-to-Output Isolation—Disabled
POWER SUPPLY
Operating Range
Quiescent Current
Quiescent Current—Disabled
PSRR, Positive Supply
PSRR, Negative Supply
2.0
7
V
S+
− 0.5
75
125
35
100
4.5
63
15
72
62
12
150
V
V
µA
V
ns
ns
µA
dB
V
mA
µA
dB
dB
All channels
All channels
Rev. PrA | Page 4 of 7
Preliminary Technical Data
ABSOLUTE MAXIMUM RATINGS
Table 3. ADA4412-3 Absolute Maximum Ratings
Parameter
Supply Voltage
Power Dissipation
Storage Temperature
Operating Temperature Range
Lead Temperature Range
(Soldering 10 sec)
Junction Temperature
Rating
12V
See Figure 2
–65°C to +125°C
–40°C to +85°C
300°C
150°C
ADA4412-3
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other condition s 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.
The power dissipated in the package (P
D
) is the sum of the
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
S
) times the
quiescent current (I
S
). The power dissipated due to load drive
depends upon 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
JA
.
Also, more metal directly in contact with the package leads
from metal traces, through-holes, ground, and power planes
reduces the θ
JA
.
Figure 2 shows the maximum safe power dissipation in the
package vs. the ambient temperature for the 20-lead QSOP
(TBD°C/W) on a JEDEC standard 4-layer board. θ
JA
values are
approximations.
2.5
THERMAL RESISTANCE
θ
JA
is specified for the worst-case conditions, i.e.,
θ
JA
is specified
for device soldered in circuit board for surface mount packages.
Table 4. Thermal Resistance
Package Type
20 Lead QSOP
θ
JA
83
θ
JC
Unit
°C/W
2.3
2.1
1.9
Watts
Maximum Power Dissipation
The maximum safe power dissipation in the ADA4412-3
package is limited by the associated rise in junction temperature
(T
J
) on the die. At approximately 150°C, which is the glass
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 of time can result in changes in the silicon devices
potentially causing failure.
1.7
1.5
1.3
1.1
0.9
0.7
0.5
-40
-20
0
20
40
60
80
Ambient Temperature C
Figure 2. Maximum Power Dissipation vs. Temperature for a 4-layer board
Rev. PrA | Page 5 of 7
京公网安备 11010802033920号
EEWORLD
