Audio/Video, 60 MHz, 16 8, Gain of +2 Crosspoint Switch AD8112 FEATURES FUNCTIONAL BLOCK DIAGRAM SER/PAR D0 D1 D2 D3 D4 Low cost, 16 8, high speed, nonblocking switch array Pin-compatible 16 16 version available (AD8113) A0 A1 Serial or parallel programming of switch array A2 CLK Serial data out allows daisy chaining control of multiple 16 8 arrays to create larger switch arrays 80-BIT SHIFT REGISTER DATA WITH 5-BIT Output disable allows connection of multiple devices DATA IN OUT PARALLEL LOADING without loading the output bus UPDATE 40 40 Complete solution CE PARALLEL LATCH Buffered inputs NO RESET CONNECT 40 8 output amplifiers 8 DECODE Operates on 5 V or 12 V supplies 8 5:16 DECODERS Low supply current of 54 mA OUTPUT Excellent audio performance V = 12 V AD8112 S 128 BUFFER G = +2 10 V output swing 0.002% THD at 20 kHz maximum 20 V p-p (R = 600 ) L Excellent video performance V = 5 V S 0.1 dB gain flatness of 10 MHz 0.1% differential gain error (R = 1 k) L SWITCH 0.1 differential phase error (R = 1 k) L MATRIX Excellent ac performance 3 dB bandwidth 60 MHz Low all-hostile crosstalk of 83 dB at 20 kHz Reset pin allows disabling of all outputs (connected to a capacitor to ground provides power-on reset capability) 100-lead LQFP (14 mm 14 mm) Figure 1. APPLICATIONS CCTV surveillance/DVR Analog/digital audio routers Video routers (NTSC, PAL, S-Video, SECAM) Multimedia systems Video conferencing GENERAL DESCRIPTION The AD8112 includes eight independent output buffers that can be placed into a disabled state for paralleling crosspoint outputs The AD8112 is a low cost, fully buffered crosspoint switch matrix so that off channel loading is minimized. The AD8112 has a gain that operates on 12 V for audio applications and 5 V for of +2. It operates on voltage supplies of 5 V or 12 V while video applications. It offers a 3 dB signal bandwidth greater consuming only 34 mA or 31 mA of current, respectively. The than 60 MHz and channel switch times of less than 60 ns with 0.1% settling for use in both analog and digital audio. The channel switching is performed via a serial digital control (which AD8112 operated at 20 kHz has a crosstalk performance of can accommodate the daisy chaining of several devices) or via 83 dB and isolation of 90 dB. In addition, ground/power pins a parallel control, allowing updating of an individual output surround all inputs and outputs to provide extra shielding for without reprogramming the entire array. operation in the most demanding audio routing applications. The AD8112 is packaged in a 100-lead LQFP and is available With a differential gain and differential phase better than 0.1% over the commercial temperature range of 0C to 70C. and 0.1, respectively, and a 0.1 dB flatness output of up to 10 MHz, the AD8112 is suitable for many video applications. 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 2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 16 INPUTS ENABLE/DISABLE SET INDIVIDUAL OR RESET ALL OUTPUTS TO OFF 8 OUTPUTS 06523-001AD8112 TABLE OF CONTENTS Features .............................................................................................. 1 Calculation of Power Dissipation............................................. 17 Applications....................................................................................... 1 Short-Circuit Output Conditions............................................. 18 Functional Block Diagram .............................................................. 1 Application Notes........................................................................... 19 General Description ......................................................................... 1 Serial Programming................................................................... 19 Revision History ............................................................................... 2 Parallel Programming................................................................ 19 Specifications..................................................................................... 3 Power-On Reset.......................................................................... 20 Timing Characteristics (Serial) .................................................. 5 Specifying Audio Levels ............................................................ 20 Timing Characteristics (Parallel) ............................................... 6 Creating Unity-Gain Channels................................................. 20 Absolute Maximum Ratings............................................................ 7 Video Signals............................................................................... 20 ESD Caution.................................................................................. 7 Creating Larger Crosspoint Arrays.......................................... 21 Power Dissipation......................................................................... 7 Multichannel Video and Audio................................................ 23 Pin Configuration and Function Descriptions............................. 9 Crosstalk...................................................................................... 23 I/O Schematics............................................................................ 11 PCB Layout...................................................................................... 26 Typical Performance Characteristics ........................................... 12 Outline Dimensions....................................................................... 28 Theory of Operation ...................................................................... 17 Ordering Guide .......................................................................... 28 REVISION HISTORY 2/07Revision 0: Initial Version Rev. 0 Page 2 of 28