ANALOG DEVICES ADA4430-1 Service Manual
Ultralow Power Video Filter
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FEATURES
6th-order performance, low-pass video filter
1 dB flatness out to 8 MHz
50 dB rejection at 27 MHz
Ultralow power-down current: 0.1 μA typ
Low quiescent current: 1.85 mA typ
Excellent video specification
Differential gain: 0.25%
Differential phase: 0.10°
SAG correction
Allows use of small capacitors in ac-coupled outputs
Low supply voltage: 2.5 V to 6 V
Rail-to-rail output
High input-to-output isolation in disabled state
92 dB @ 1 MHz
Low input bias current: 0.5 μA
Small packaging: SC70
Wide operating temperature range: −40°C to +125°C
APPLICATIONS
Portable media players
Portable gaming consoles
Cell phones
Digital still cameras
Portable DVD players
Portable video cameras
with Power-Down
ADA4430-1
PIN CONFIGURATION
ADA4430-1
V
IN
GND
SAG
6.5
6.0
5.5
5.0
4.5
GAIN (dB)
4.0
3.5
3.0
11
Figure 2. Frequency Response Fla
x1
1
2*R
2
R
2*R
3
2*R
Figure 1.
VS = 5V
FREQUENCY (MHz)
tness at Various Power Supplies
+
V
6
S
5
PD
4
V
OUT
05885-001
VS = 3V
05885-006
0
GENERAL DESCRIPTION
The ADA4430-1 is a fully integrated video reconstruction filter
that combines excellent video specifications with low power
consumption and an ultralow power disable, making it ideal
for portable video filtering applications. With 1 dB frequency
flatness out to 8 MHz and 50 dB rejection at 27 MHz, the
ADA4430-1 is ideal in SD video applications, including
NTSC and PAL.
The ADA4430-1 operates on single supplies as low as 2.5 V and
h as 6 V while providing the dynamic range required by
as hig
the most demanding video systems.
Rev. A
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 ADA4430-1 also provides an on-chip dc offset to avoid
c
lipping of the sync tips at the filter output, as well as SAG
correction that permits smaller capacitor values to be used in
applications with ac-coupled outputs.
The ADA4430-1 is available in a 6-lead SC70 package and is
r
ated to work in the extended automotive temperature range of
−40°C to +125°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved.
ADA4430-1
www.BDTIC.com/ADI
TABLE OF CONTENTS
Features .............................................................................................. 1
Theory of Operation ...................................................................... 11
Applications....................................................................................... 1
Pin Configuration............................................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Thermal Resistance ...................................................................... 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Typical Performance Characteristics ............................................. 6
Test Cir c ui t s .....................................................................................10
REVISION HISTORY
6/06—Rev. 0 to Rev. A
Changes to Figure 1.......................................................................... 1
Changes to Figure 4.......................................................................... 5
Overview ..................................................................................... 11
Power Savings Using the ADA4430-1 ..................................... 11
Applications..................................................................................... 12
Examples Illustrating Output Coupling.................................. 12
Usable Input Voltage Range ...................................................... 13
SAG Correction Frequency Response..................................... 13
Reconstruction Filter Applications.......................................... 14
Printed Circuit Board Layout ................................................... 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 16
3/06—Revision 0: Initial Version
Rev. A | Page 2 of 16
ADA4430-1
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SPECIFICATIONS
VS = 3 V @ TA = 25°C, VIN = 1 V p-p, RL = 150 Ω, unless otherwise noted.
Table 1.
Parameter Test Conditions/Comments Min Typ Max Unit
ELECTRICAL SPECIFICATIONS
Quiescent Supply Current 1.85 2.3 mA
Quiescent Supply Current—Disabled 0.1 5 μA
Supply Voltage 2.5 6 V
Input Voltage Range—Low/High Limited by output range; see the Applications section 0/1.38 V
Input Resistance 10 MΩ
Input Capacitance 1 pF
Input Bias Current 0.5 μA
Output Voltage Range—Low/High 0.10/2.85 V
Output Offset Voltage 95 140 mV
PSRR Input referred 50 60 dB
Pass-Band Gain 5.85 6 dB
Input-to-Output Isolation—Disabled f = 1 MHz 92 dB
FILTER CHARACTERISTICS
−3 dB Bandwidth 7 9.7 MHz
1 dB Flatness 5.5 8.0 MHz
Out-of-Band Rejection f = 27 MHz 40 50 dB
Differential Gain Modulated 10 step ramp, sync tip at 0 V 0.25 %
Differential Phase Modulated 10 step ramp, sync tip at 0 V 0.10 Degrees
Linear Output Current 40 mA
Group Delay Variation f = 100 kHz to 5 MHz 7 ns
Signal-to-Noise Ratio 100% white signal, f = 100 kHz to 5 MHz 76 dB
VS = 5 V @ TA = 25°C, VIN = 1 V p-p, RL = 150 Ω, unless otherwise noted.
Table 2.
Parameter Test Conditions/Comments Min Typ Max Unit
ELECTRICAL SPECIFICATIONS
Quiescent Supply Current 2.0 2.4 mA
Quiescent Supply Current—Disabled 0.2 10 μA
Supply Voltage 2.5 6 V
Input Voltage Range—Low/High Limited by output range; See the Applications section 0/2.35 V
Input Resistance 10 MΩ
Input Capacitance 1 pF
Input Bias Current 0.5 μA
Output Voltage Range—Low/High 0.10/4.80 V
Output Offset Voltage 100 145 mV
PSRR Input referred 50 61 dB
Pass-Band Gain 5.85 6 dB
Input-to-Output Isolation—Disabled f = 1 MHz 92 dB
FILTER CHARACTERISTICS
−3 dB Bandwidth 7.2 9.5 MHz
1 dB Flatness 5.5 7.9 MHz
Out-of-Band Rejection f = 27 MHz 40 50 dB
Differential Gain Modulated 10 step ramp, sync tip at 0 V 0.25 %
Differential Phase Modulated 10 step ramp, sync tip at 0 V 0.15 Degrees
Linear Output Current 40 mA
Group Delay Variation f = 100 kHz to 5 MHz 7.1 ns
Signal-to-Noise Ratio 100% white signal, f = 100 kHz to 5 MHz 76 dB
Rev. A | Page 3 of 16
ADA4430-1
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ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter Rating
Supply Voltage 6 V
Power Dissipation See Figure 3
Storage Temperature Range –65°C to +125°C
Operating Temperature Range –40°C to +125°C
Lead Temperature (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 a device soldered in the circuit board.
Table 4. Thermal Resistance
Package Type θ
6-Lead SC70 430 °C/W
JA
Maximum Power Dissipation
The maximum safe power dissipation in the ADA4430-1
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 can change the
stresses that the package exerts on the die, permanently shifting
the parametric performance of the ADA4430-1. Exceeding a
junction temperature of 150°C for an extended period can
Unit
The power dissipated in the package (P
quiescent power dissipation and the power dissipated in the
package due to the load drive. The quiescent power is the
voltage between the supply pins (V
current (I
). The power dissipated due to the load drive depends
S
upon the particular application. The power due to load drive is
calculated by multiplying the load current by the associated
voltage drop across the device. RMS voltages and currents must
be used in these calculations.
Airflow increases heat dissipation, effectively reducing θ
addition, more metal directly in contact with the package leads
from metal traces, through-holes, ground, and power planes
reduces the θ
.
JA
Figure 3 shows the maximum safe power dissipation in the
p
ackage vs. the ambient temperature for the 6-lead SC70
(430°C/W) on a JEDEC standard 4-layer board.
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
MAXIMUM POWER DISSIPATION (W)
0.05
0
–40 120100806040020–20
Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
result in changes in the silicon devices potentially causing
failure.
AMBIENT TEMP ERATURE (°C)
) is the sum of the
D
) times the quiescent
S
JA
. In
05885-002
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. A | Page 4 of 16
ADA4430-1
www.BDTIC.com/ADI
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADA4430-1
V
IN
x1
1
+
V
6
S
GND
SAG
2*R
2
R
2*R
3
Figure 4. 6-Lead SC70, Top View
2*R
5
PD
4
V
OUT
05885-041
Table 5. Pin Function Descriptions
Pin Number Mnemonic Description
1 V
IN
Input Voltage.
2 GND Ground.
3 SAG Feedback Connection.
4 V
5
6 V
OUT
PD
S+
Output Voltage.
Power Down.
Positive Power Supply.
Rev. A | Page 5 of 16
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