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AD8109 Datasheet(PDF) 1 Page - Analog Devices |
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AD8109 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 33 page  325 MHz, 8 × 8 Buffered Video Crosspoint Switches AD8108/AD8109 Rev. B 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 rights of third parties that may result from its use. Specifications subject to change without notice. No 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved. EATURES 8 × 8 high speed nonblocking switch arrays AD8108: G = 1 AD8109: G = 2 Serial or parallel programming of switch array Serial data out allows daisy-chaining of multiple 8 × 8 arrays to create larger switch arrays Output disable allows connection of multiple devices Pin-compatible with AD8110/AD8111 16 × 8 switch arrays For 16 × 16 arrays see AD8116 Complete solution Buffered inputs Eight output amplifiers AD8108 (G = 1) AD8109 (G = 2) Drives 150 Ω loads Excellent video performance 60 MHz 0.1 dB gain flatness 0.02%/0.02° differential gain/differential phase error (RL = 150 Ω) Excellent ac performance −3 dB bandwidth: 325 MHz (AD8108), 250 MHz (AD8109) Slew rate: 400 V/μs (AD8108), 480 V/μs (AD8109) Low power of 45 mA Low all hostile crosstalk of −83 dB @ 5 MHz Reset pin allows disabling of all outputs (connected through a capacitor to ground provides power-on reset capability) Excellent ESD rating: exceeds 4000 V human body model 80-lead LQFP (12 mm × 12 mm) APPLICATIONS Routing of high speed signals including Composite video (NTSC, PAL, S, SECAM) Component video (YUV, RGB) Compressed video (MPEG, Wavelet) 3-level digital video (HDB3) GENERAL DESCRIPTION The AD8108/AD8109 are high speed 8 × 8 video crosspoint switch matrices. They offer a −3 dB signal bandwidth greater than 250 MHz and channel switch times of less than 25 ns with 1% settling. With −83 dB of crosstalk and −98 dB isolation (@5 MHz), the AD8108/AD8109 are useful in many high speed applications. The differential gain and differential phase of better than 0.02% FUNCTIONAL BLOCK DIAGRAM AD8108/AD8109 SWITCH MATRIX OUTPUT BUFFER G = +1 G = +2 32 32 64 32-BIT SHIFT REGISTER WITH 4-BIT PARALLEL LOADING PARALLEL LATCH DECODE 8 4:8 DECODERS 8 CLK DATA IN UPDATE CE RESET 8 INPUTS A0 DATA OUT 8 OUTPUTS SET INDIVIDUAL OR RESET ALL OUTPUTS TO "OFF" A1 A2 SER/PAR D0 D1 D2 D3 Figure 1. Functional Block Diagram and 0.02°, respectively, along with 0.1 dB flatness out to 60 MHz, make the AD8108/AD8109 ideal for video signal switching. The AD8108 and AD8109 include eight independent output buffers that can be placed into a high impedance state for paral- leling crosspoint outputs so that off channels do not load the output bus. The AD8108 has a gain of 1, while the AD8109 offers a gain of 2. They operate on voltage supplies of ±5 V while consuming only 45 mA of idle current. The channel switching is performed via a serial digital control (which can accommodate daisy-chaining of several devices) or via a parallel control allowing updating of an individual output without re-programming the entire array. The AD8108/AD8109 is packaged in an 80-lead LQFP package and is available over the extended industrial temperature range of −40°C to +85°C. |
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