Ultralow Power SD Video Filter with Load Detection Data Sheet ADA4431-1 FEATURES PIN CONFIGURATION Third-order, low-pass video filter 1 dB flatness out to 6 MHz 27 dB rejection at 27 MHz Low quiescent current: 4.7 mA typical +V 1 12 GND S LOAD Low power-down current: 24 A typical DETECT 2 IN 11 SUBS Load detection capability LPF G = 2 SAG correction DIS 3 10 +V S Allows use of smaller capacitors in ac-coupled outputs CAP1 LDO 4 9 Low supply voltage: 2.5 V to 3.6 V CHARGE PUMP Charge pump Creates a negative voltage from single positive supply Allows capless output coupling with no dc offset Rail-to-rail output Figure 1. High input-to-output isolation in disabled state +V S 89 dB 1 MHz Small package 0.1F 0.1F 3 mm 3 mm LFCSP 1 10 Low 0.55 mm package height 4 16 +V +V S S FB1 LDO Wide operating temperature range: 40C to +85C SYSTEM 3 15 CONTROLLER ADA4431-1 DIS FB2 VIDEO OUT VIDEO APPLICATIONS 2 OUT 14 75 IN DAC/ x1 x2 ENCODER LPF Portable media players 13 Portable gaming consoles SAG 7 GND Cell phones CAP4 CAP3 CAP2 CAP1 SUBS GND Digital still cameras 5 6 8 9 11 12 Portable DVD players 0.1F 0.1F 1.0F Portable video cameras Figure 2. Typical Application Circuit GENERAL DESCRIPTION The ADA4431-1 is a fully integrated video reconstruction filter When operating with the charge pump off, the ADA4431-1 that combines excellent video specifications with low power provides a dc offset to keep the sync tip approximately 100 mV consumption, making it ideal for portable video filtering above ground. In addition, the part features SAG correction, applications. The ADA4431-1 is able to detect whether a video which permits the use of smaller capacitors in applications with load is present at the output, powering down the device when ac-coupled outputs. the load is disconnected. The ADA4431-1 is packaged in a low profile 16-lead LFCSP and The ADA4431-1 operates on single supplies as low as 2.5 V operates in the industrial temperature range of 40C to +85C. while providing the dynamic range required by the most demanding video systems. The on-board charge pump provides a virtual negative supply, allowing the video signal to be dc-coupled and the black level to be set to ground, while the sync passes cleanly at 300 mV below ground. Rev. A Document Feedback 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 20072015 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com 06734-001 06734-002 CAP4 5 16 FB1 CAP3 6 15 FB2 GND 7 14 OUT CAP2 8 13 SAGADA4431-1 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration and Function Descriptions ..............................6 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................7 Pin Configuration ............................................................................. 1 Theory of Operation .........................................................................9 General Description ......................................................................... 1 Overview ........................................................................................9 Revision History ............................................................................... 2 Charge Pump Operation ..............................................................9 Specifications ..................................................................................... 3 Load Detect ....................................................................................9 Absolute Maximum Ratings ............................................................ 5 Evaluation Board ............................................................................ 10 Thermal Resistance ...................................................................... 5 Outline Dimensions ....................................................................... 12 Maximum Power Dissipation ..................................................... 5 Ordering Guide .......................................................................... 12 ESD Caution .................................................................................. 5 REVISION HISTORY 11/15Rev. 0 to Rev. A Changes to 3 dB Bandwidth Parameter, Table 1 ........................ 3 Changes to 3 dB Bandwidth Parameter, Table 2 ........................ 4 Changes to Figure 4 and Table 5 ..................................................... 6 Updated Outline Dimensions ....................................................... 12 Changes to Ordering Guide .......................................................... 12 8/07Revision 0: Initial Version Rev. A Page 2 of 12