Integrated Triple Video Filter and Buffer with Selectable Cutoff Frequencies and Multiplexed Inputs for RGB, HD/SD ADA4411-3 FEATURES FUNCTIONAL BLOCK DIAGRAM Sixth-order adjustable video filters 36 MHz, 18 MHz, and 9 MHz Y1/G1 IN 2 Y/G OUT 4 Many video standards supported: RGB, YPbPr, YUV, SD, Y/C Y2/G2 IN 36MHz, 18MHz, 9MHz Ideal for 720p and 1080i resolutions 1 dB bandwidth of 30.5 MHz for HD Pb1/B1 IN 2 Pb/B OUT 4 Low quiescent power Pb2/B2 IN 36MHz, 18MHz, 9MHz Only 265 mW for 3 channels on 5 V supply Disable feature cuts supply current to 15 A Pr1/R1 IN 2 Pr/R OUT 2:1 mux on all inputs 4 Pr2/R2 IN 36MHz, 18MHz, 9MHz Variable gain: 2 or 4 INPUT SELECT DC output offset adjust: 0.5 V, input referred DC OFFSET Excellent video specifications ADA4411-3 LEVEL1 Wide supply range: +4.5 V to 5 V LEVEL2 Rail-to-rail output 2 CUTOFF SELECT Output can swing 4.5 V p-p on single 5 V supply GAIN SELECT DISABLE Small packaging: 24-lead QSOP Figure 1. APPLICATIONS Set-top boxes Personal video recorders DVD players and recorders HDTVs Projectors GENERAL DESCRIPTION The ADA4411-3 is a comprehensive filtering solution designed The ADA4411-3 can operate on a single +5 V supply as well as to give designers the flexibility to easily filter and drive various 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 15 A when a particular device is not filter combinations that are tuned for RGB, high definition, and in use. standard definition video signals. The ADA4411-3 has a rail- Dual-supply operation is best for applications where the to-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 The ADA4411-3 offers gain and voltage offset adjustments. below ground while maintaining excellent video performance. With a single logic pin, the throughput filter gain can be The output buffers have the ability to drive two 75 doubly selected to be 2 or 4. Output voltage offset is continuously terminated cables that are either dc-coupled or ac-coupled. adjustable over an input-referred range of 500 mV by applying The ADA4411-3 is available in the 24-lead, wide body a differential voltage to an independent offset control input. QSOP and is rated for operation over the extended The ADA4411-3 offers 2:1 multiplexers on all of its video industrial temperature range of 40C to +85C. inputs, which are useful in applications where filtering is required for multiple sources of video signals. 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. 05527-001ADA4411-3 TABLE OF CONTENTS Features .............................................................................................. 1 Overview ..................................................................................... 11 Applications....................................................................................... 1 Multiplexer Select Inputs........................................................... 11 Functional Block Diagram .............................................................. 1 Throughput Gain........................................................................ 11 General Description ......................................................................... 1 Disable ......................................................................................... 11 Revision History ............................................................................... 2 Cutoff Frequency Selection....................................................... 11 Specifications..................................................................................... 3 Output DC Offset Control........................................................ 11 Absolute Maximum Ratings............................................................ 5 Input and Output Coupling ...................................................... 12 Thermal Resistance ...................................................................... 5 Printed Circuit Board Layout ................................................... 13 ESD Caution.................................................................................. 5 Video Encoder Reconstruction Filter...................................... 13 Pin Configuration And Function Descriptions............................ 6 Outline Dimensions ....................................................................... 15 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 15 Theory of Operation ...................................................................... 10 Applications..................................................................................... 11 REVISION HISTORY 7/05Revision 0: Initial Version Rev. 0 Page 2 of 16