ADA4430-1 Analog Devices, ADA4430-1 Datasheet

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ADA4430-1

Manufacturer Part Number
ADA4430-1
Description
Ultralow Power Video Filter
Manufacturer
Analog Devices
Datasheet

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FEATURES
6
Ultralow power-down current: 0.1 μA typ
Low quiescent current: 1.85 mA typ
Excellent video specification
SAG correction
Low supply voltage: 2.5 V to 6 V
Rail-to-rail output
High input-to-output isolation in disabled state
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
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
as high as 6 V while providing the dynamic range required by
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 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 owners.
th
1 dB flatness out to 8 MHz
50 dB rejection at 27 MHz
Differential gain: 0.25%
Differential phase: 0.10°
Allows use of small capacitors in ac-coupled outputs
92 dB @ 1 MHz
-order performance, low-pass video filter
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The ADA4430-1 also provides an on-chip dc offset to avoid
clipping 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
rated to work in the extended automotive temperature range of
−40°C to +125°C.
Figure 2. Frequency Response Flatness at Various Power Supplies
Ultralow Power Video Filter
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
1
GND
SAG
V
IN
1
2
3
PIN CONFIGURATION
2*R
2*R
©2006 Analog Devices, Inc. All rights reserved.
x1
with Power-Down
FREQUENCY (MHz)
R
Figure 1.
ADA4430-1
2*R
V
ADA4430-1
S
= 5V
6
5
4
V
PD
V
www.analog.com
S
OUT
+
V
S
= 3V
1
0

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ADA4430-1 Summary of contents

Page 1

... 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 as high while providing the dynamic range required by the most demanding video systems. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable ...

Page 2

... REVISION HISTORY 6/06—Rev Rev. A Changes to Figure 1.......................................................................... 1 Changes to Figure 4.......................................................................... 5 3/06—Revision 0: Initial Version Theory of Operation ...................................................................... 11 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 ...

Page 3

... Limited by output range; See the Applications section Input referred MHz MHz Modulated 10 step ramp, sync tip Modulated 10 step ramp, sync tip 100 kHz to 5 MHz 100% white signal 100 kHz to 5 MHz Rev Page ADA4430-1 Min Typ Max Unit 1.85 2.3 mA 0.1 5 μ ...

Page 4

... 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 result in changes in the silicon devices potentially causing failure ...

Page 5

... Mnemonic GND 3 SAG 4 V OUT ADA4430 2*R GND 2*R 2*R SAG OUT Figure 4. 6-Lead SC70, Top View Description Input Voltage. Ground. Feedback Connection. Output Voltage. Power Down. Positive Power Supply. Rev Page ADA4430-1 ...

Page 6

... ADA4430-1 TYPICAL PERFORMANCE CHARACTERISTICS = 2 high 150 Ω OUT – –6 –9 –12 –15 –18 –21 –24 –27 –30 –33 –36 –39 –42 –45 – FREQUENCY (MHz) Figure 5. Frequency Response at Various Power Supplies ...

Page 7

... Figure 15. PSRR vs. Frequency at Various Power Supplies 10000 1000 100 10 0.1 10 100 Figure 16. Disabled Output Impedance vs. Frequency Rev Page ADA4430 FREQUENCY (MHz) Figure 14. Group Delay at Various Power Supplies INPUT REFERRED 3V 0.01 0 ...

Page 8

... ADA4430-1 3.0 2.5 2.0 1.5 1.0 0.5 0 Figure 17. Transient Response 3.5 DISABLE DISABLE 3.0 2.5 2.0 1.5 1.0 0.5 OUTPUT 0 –0.5 Figure 18. Disable Assert Time 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 –0.5 –1.0 Figure 19. Overdrive Recovery 3.00 2.75 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 100ns/DIV 0.25 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 1µs/DIV –0.5 –0.10 OUTPUT –0.11 2 × INPUT –0.12 –0.13 –0.14 –0.15 –0.16 –0.17 –0.18 –0.19 200ns/DIV –0.20 –40 Figure 22. Output Swing Limits vs. Temperature Rev Page INPUT × ...

Page 9

... DIS 1.80 1.75 1.70 DISABLED (V = 0V) DIS 1.65 –40 – TEMPERATURE (°C) Figure 23. Power Supply Current vs. Temperature 400 2.0 1.8 1.6 300 1.4 1.2 200 1.0 0.8 0.6 100 0.4 0 100 120 0 Figure 24. Power Supply Current vs. Disable Voltage at Various Temperatures Rev Page ADA4430-1 +125°C –40°C +25°C 0.5 1.0 1.5 2.0 2.5 DISABLE VOLTAGE (V) 3.0 ...

Page 10

... Figure 26. Test Circuit Used for Differential Gain, Differential Phase, and Noise Tests V S+ ADA4430 0. ×1 V OUT 50Ω 2 GND 2.6kΩ 1.3kΩ 2.6kΩ 2.6kΩ 3 SAG V S+ ADA4430 1.0V 150Ω 220µ ×1 V OUT 150Ω 2 GND 2.6kΩ 1.3kΩ 2.6kΩ 2.6kΩ 3 SAG Rev Page 0.1µ 150Ω ...

Page 11

... DAC output power requirements. When not in use, the ADA44330-1 can be shutdown to draw less than 1 μA of supply current using the power-down pin Additionally, the ADA4430-1 is unique in that high order filter that fits into an SC70 package. The ADA4430-1 provides a minimum 1 dB bandwidth of 5 ...

Page 12

... The ADA4430-1 is ideally suited for use as a reconstruction filter that follows a video DAC or encoder. The application circuits in Figure 29, Figure 30, and Figure 31 illustrate a number of ways the ADA4430-1 can be used with a single- supply current-output DAC on its input and its output ac- and dc-coupled. POWER-DOWN CONTROL ...

Page 13

... OO SAG CORRECTION FREQUENCY RESPONSE When using the SAG corrected circuit, the gain from the input to the immediate output of the ADA4430-1 is ×2.5 (≈8 dB) at extremely low frequencies where the outer feedback loop formed by the 22 μF capacitor effectively opens (see Figure 29) and exhibits a second-order peak of approximately the neighborhood ...

Page 14

... ADA4430-1 RECONSTRUCTION FILTER APPLICATIONS Figure 33 illustrates how to use the ADA4430 dc-coupled reconstruction filter with a pass band gain of 2 following the low power ADV7190/ADV7191 video encoder. One ADV7191 output DAC is shown for illustrative purposes, and the remaining portions of the ADV7190/ADV7191 The ADV7190/ADV7191 is operated in 4× ...

Page 15

... All signal outputs of the ADA4430-1 should include series termination resistors when driving transmission lines. When the ADA4430-1 receives its inputs from a device with current outputs, the required load resistor value for the output current is most often different from the characteristic impedance of the signal traces ...

Page 16

... OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range 1 ADA4430-1YKSZ_R2 −40°C to +125°C 1 ADA4430-1YKSZ-R7 −40°C to +125°C 1 ADA4430-1YKSZ-RL −40°C to +125° Pb-free part. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 2.20 2.00 1.80 2.40 1.35 ...

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