Low Cost 6-Channel HD/SD Video Filter ADA4420-6 FEATURES FUNCTIONAL BLOCK DIAGRAM Sixth-order filters INSD1 OUTSD1 1 2 Transparent input sync tip clamp SD CLAMP 1 dB bandwidth of 26 MHz typical for HD HD rejection 75 MHz: 48 dB typical INSD2 OUTSD2 1 2 NTSC differential gain: 0.19% SD CLAMP NTSC differential phase: 0.76 Rail-to-rail outputs INSD3 OUTSD3 1 2 Low quiescent current: 32 mA typical SD CLAMP Disable feature DIS Output dc offset INHD1 OUTHD1 1 2 HD APPLICATIONS CLAMP Set-top boxes INHD2 OUTHD2 DVD players and recorders 1 2 HD HDTVs CLAMP Projectors INHD3 OUTHD3 Personal video recorders 1 HD 2 CLAMP ADA4420-6 Figure 1. GENERAL DESCRIPTION The ADA4420-6 is a low cost video reconstruction filter specifically Each channel features a transparent sync tip clamp, allowing ac designed for consumer applications. It consists of six independent coupling of the inputs without requiring dc restoration. sixth-order Butterworth filters/buffers, three for standard The output drivers on the ADA4420-6 have rail-to-rail output definition (Y/C or CVBS) and three for high definition capabilities with 6 dB gain. A built-in offset of 250 mV allows component signals (YPrPb or RGB). the outputs to be dc-coupled, eliminating the need for large The ADA4420-6 operates from a single 5 V supply and has a coupling capacitors. Each output is capable of driving two 75 low quiescent current of 32 mA, making it ideal for applications doubly terminated cables. where power consumption is critical. A disable feature allows The ADA4420-6 is available in either a 16-lead QSOP or a 20-lead for further power conservation by reducing the supply current TSSOP, and operates in the extended industrial temperature to less than 8 A typical when the device is not in use. range of 40C to +85C. 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 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 20082011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 07532-001ADA4420-6 TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications....................................................................................... 1 Test Circuits..................................................................................... 10 General Description ......................................................................... 1 Applications Information .............................................................. 11 Functional Block Diagram .............................................................. 1 Overview ..................................................................................... 11 Revision History ............................................................................... 2 Disable ......................................................................................... 11 Specifications..................................................................................... 3 Input and Output Coupling ...................................................... 11 Absolute Maximum Ratings............................................................ 4 Printed Circuit Board (PCB) Layout ....................................... 11 Thermal Resistance ...................................................................... 4 Video Encoder Reconstruction Filter...................................... 11 Maximum Power Dissipation ..................................................... 4 Outline Dimensions....................................................................... 13 ESD Caution.................................................................................. 4 Ordering Guide .......................................................................... 14 Pin Configuration and Function Descriptions............................. 5 REVISION HISTORY 5/11Rev. 0 to Rev. A Added 20-Lead TSSOP Package.......................................Universal Changes to General Description Section ...................................... 1 Changes to Disable Assert Voltage, Disable Assert Time, Disable De-Assert Time Parameters ............................................................ 3 Changes to Table 3, Maximum Power Dissipation Section, and Figure 2....................................................................................... 4 Added Figure 4 and Table 5............................................................. 6 Changes to Figure 18, Figure 19, and Figure 20 ......................... 10 Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 14 8/08Revision 0: Initial Version Rev. A Page 2 of 16