Integrated Triple Video Filter with Selectable Cutoff Frequencies for RGB, HD/SD ADA4412-3 FEATURES FUNCTIONAL BLOCK DIAGRAM Sixth-order adjustable video filters 36 MHz, 18 MHz, and 9 MHz Y/G IN 1 2 Y/G OUT Many video standards supported: RGB, YPbPr, YUV, SD, Y/C 36MHz, 18MHz, 9MHz Ideal for 720p and 1080i resolutions 1 dB bandwidth of 31.5 MHz for HD 1 2 Pb/B OUT Pb/B IN Low quiescent power 36MHz, 18MHz, 9MHz Only 265 mW for 3 channels on 5 V supply Disable feature cuts supply current to 10 A Pr/R IN 1 2 Pr/R OUT DC output offset adjust: 0.5 V, input referred 36MHz, 18MHz, 9MHz Fixed throughput gain of 2 DC OFFSET Excellent video specifications LEVEL1 Wide supply range: +4.5 V to 5 V LEVEL2 ADA4412-3 Rail-to-rail output 2 CUTOFF SELECT Output can swing 4.5 V p-p on single 5 V supply DISABLE Small packaging: 20-lead QSOP Figure 1. APPLICATIONS Set-top boxes DVD players and recorders Personal video recorders HDTVs Projectors GENERAL DESCRIPTION The ADA4412-3 is a comprehensive filtering solution designed The ADA4412-3 can operate on a single +5 V supply as to give designers the flexibility to easily filter and drive various well as on 5 V supplies. Single-supply operation is ideal in video signals, including high definition video. Cutoff frequen- applications where power consumption is critical. The disable cies of the sixth-order video filters range from 9 MHz to feature allows for further power conservation by reducing the 36 MHz and can be selected by two logic pins to obtain four supply current to typically 10 A when a particular device is not filter combinations that are tuned for RGB, high definition, and in use. standard definition video signals. The ADA4412-3 has a rail-to- Dual-supply operation is best for applications where the rail output that can swing 4.5 V p-p on a single 5 V supply. negative-going video signal excursions must swing at or below The ADA4412-3 includes an output offset voltage adjustment ground while maintaining excellent video performance. The feature. Output voltage offset is continuously adjustable over an output buffers have the ability to drive two 75 doubly input-referred range of 500 mV by applying a differential terminated cables that are either dc-coupled or ac-coupled. voltage to an independent offset control input. The ADA4412-3 is available in a 20-lead QSOP and is rated for operation over the extended industrial temperature range of 40C to +85C. Rev. 0 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 05528-001ADA4412-3 TABLE OF CONTENTS Features .............................................................................................. 1 Applications..................................................................................... 10 Applications....................................................................................... 1 Overview ..................................................................................... 10 Functional Block Diagram .............................................................. 1 Disable ......................................................................................... 10 General Description ......................................................................... 1 Cutoff Frequency Selection....................................................... 10 Revision History ............................................................................... 2 Output DC Offset Control........................................................ 10 Specifications..................................................................................... 3 Input and Output Coupling ...................................................... 11 Absolute Maximum Ratings............................................................ 5 Printed Circuit Board Layout ................................................... 11 Thermal Resistance ...................................................................... 5 Video Encoder Reconstruction Filter...................................... 11 ESD Caution.................................................................................. 5 Outline Dimensions ....................................................................... 13 Pin Configuration And Function Descriptions............................ 6 Ordering Guide .......................................................................... 13 Typical Performance Characteristics ............................................. 7 Theory of Operation ........................................................................ 9 REVISION HISTORY 7/05Revision 0: Initial Version Rev. 0 Page 2 of 16