6-Channel SD/ED/HD Video Filter with Charge Pump ADA4424-6 FEATURES FUNCTIONAL BLOCK DIAGRAM +3.3V +5V 3 SD channels 18 MHz typical 1 dB bandwidth (BW) VDD3 SD VDD3 HD VDD5 3 ED/HD channels 25 MHz or 34 MHz typical 1 dB BW D1 L1 L1 OUT Fixed gain of 6.2 dB (2.042 V/V) D2 L2 L2 OUT D/S On-board negative supply for output coupling without D3 TERMINAL HD ENB CONTROL L3 L3 OUT capacitors S S1/S2 SD ENB S1/S2 OUT Minimal dc offset at the output pins Internal summation of Y and C channels for CVBS output Y IN 1 2 Y OUT Flexible input dc offset cancellation for luma channels LPF 2 CVBS OUT D-terminal (EIAJ RC-5237 D5) and S-terminal (S1/S2) support Capable of driving 2 back-terminated 75 video loads 1 2 C IN C OUT LPF simultaneously MODE0 OFFSET Separate power-down pins for SD and ED/HD sections MODE1 ADA4424-6 CANCELLATION OFFSET ENB 38-lead TSSOP package FC SEL Sony Green Partner Environmental Quality Approval 1 HY IN 2 HY OUT LPF Program compliant FC SEL 1 2 HPb IN HPb OUT APPLICATIONS LPF FC SEL DVD players and recorders HPr IN 1 2 HPr OUT Set-top boxes LPF VSS SD Projectors FC SEL SD ENB HD ENB VSS HD SD ENABLE Personal video recorders POWER CHARGE PUMP MANAGEMENT HD ENABLE VDD3 CP C1a C1b C2/CP OUT GND CP +3.3V C1 C2 Figure 1. GENERAL DESCRIPTION The ADA4424-6 is a high performance video reconstruction filter The luma channels (Y IN, HY IN) of the ADA4424-6 are specifically designed for consumer applications. It consists of a capable of detecting and cancelling dc input offsets of up to standard definition (SD) section with two fifth-order Butterworth 1.1 V. Four distinct modes of detection/cancellation are filters and a high definition (HD) section with three fifth-order available. filters. The SD section contains an internal Y/C summer for CVBS The output drivers on the ADA4424-6 feature rail-to-rail outputs output, whereas the HD section provides selectable corner with 6.2 dB gain. An on-board charge pump allows the outputs to frequencies for either extended definition (ED) or HD signals. swing up to 1.4 V below ground, eliminating the need for large The ADA4424-6 filter/buffer section operates from a single 3.3 V coupling capacitors. Each output is capable of driving two 75 supply. Full support for D-terminal (EIAJ RC-5237 D5) and S1/S2 doubly terminated cables. signaling is provided, along with a dedicated 5 V supply pin. The ADA4424-6 is available in a 38-lead TSSOP and operates in Separate enable pins are provided for the SD and HD sections. the industrial temperature range of 40C to +85C. Rev. C 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 2009-2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 08550-001ADA4424-6 TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................9 Applications ....................................................................................... 1 Applications Information .............................................................. 11 Functional Block Diagram .............................................................. 1 CVBS Output .............................................................................. 11 General Description ......................................................................... 1 Corner Frequency Selection ..................................................... 11 Revision History ............................................................................... 2 Input DC Offset Cancellation ................................................... 11 Specif icat ions ..................................................................................... 3 D-Terminal and S-Terminal Support ...................................... 12 Absolute Maximum Ratings ............................................................ 6 Power-Down ............................................................................... 13 Thermal Resistance ...................................................................... 6 Charge Pump .............................................................................. 13 Maximum Power Dissipation ..................................................... 6 Printed Circuit Board (PCB) Layout ....................................... 13 ESD Caution .................................................................................. 6 Outline Dimensions ....................................................................... 15 Pin Configuration and Function Descriptions ............................. 7 Ordering Guide .......................................................................... 15 REVISION HISTORY 07/10Rev. B to Rev. C Change to General Description Section ........................................ 1 05/10Rev. A to Rev. B Change to Table 1, Overall Performance ....................................... 3 Change to Ordering Guide ............................................................ 15 12/09Rev. 0 to Rev. A Changes to Table 1 ............................................................................ 4 Changes to Table 2 ............................................................................ 5 Changes to Table 5 .......................................................................... 10 Changes to Table 8 to Table 11 ...................................................... 11 Change to Table 12 and Table 13 .................................................. 12 10/09Revision 0: Initial Version Rev. C Page 2 of 16