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AD8141ACPZ-RL Datasheet(PDF) 1 Page - Analog Devices |
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AD8141ACPZ-RL Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page Low Cost, Triple Differential Drivers for Wideband Video AD8141/AD8142 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. 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 © 2011 Analog Devices, Inc. All rights reserved. FEATURES Triple, high speed differential drivers 255 MHz, −3 dB large signal bandwidth 65 MHz, 0.1 dB flatness 1150 V/μs slew rate 12 ns settling time Single 5 V or split supply operation Fixed gain of 2 Internal common-mode feedback network Output balance error −50 dB at 50 MHz AD8142 has integrated sync-on-common-mode circuitry High-Z output when disabled Differential-to-differential or single-ended-to-differential operation High isolation between amplifiers: −100 dB at 10 MHz Low power: 44 mA at 5 V Available in space-saving packaging: 4 mm × 4 mm LFCSP APPLICATIONS Keyboard-video-mouse (KVM) networking Video distribution Digital signage Security cameras GENERAL DESCRIPTION The AD8141 and AD8142 are triple, low cost, differential or single-ended-input-to-differential-output drivers. Each amplifier has a fixed gain of 2 to compensate for the attenuation of the line termination resistors. The AD8141 and AD8142 are specifically designed for RGB signals but can be used for any type of signals. The amplifiers have very fast slew rate and settling time while being manufactured on a cost effective CMOS process. They are optimized for high resolution video performance with a 0.1 dB flatness of 65 MHz, which allows driving high resolution video over any type of UTP cable. The drivers have an internal common-mode feedback loop that provides output amplitude and phase matching, achieving −50 dB balance error at 50 MHz and thereby suppressing even- order harmonics and minimizing radiated electromagnetic interference (EMI). FUNCTIONAL BLOCK DIAGRAMS 1 DIS 2 VS–/GND 3 –IN A 4 +IN A 5 VS–/GND 6 –OUT A 15 +IN C 16 –IN C 17 VS+ 18 24 23 22 21 20 19 VOCMC 14 VS–/GND 13 12 11 10 9 8 7 –OUT C + – + – + – AD8141 Figure 1. 24 23 22 21 20 19 12 11 10 9 8 7 + – + – + – AD8142 15 16 17 18 14 13 1 2 3 4 5 6 DIS VS–/GND –IN R +IN R VS–/GND –OUT R +IN B –IN B VS+ SYNC LEVEL VS–/GND –OUT B ×2 Figure 2. The AD8142 includes a unique sync-on-common-mode feature that allows the user to transmit balanced horizontal and vertical video sync signals over the three common-mode channels. Additionally, the AD8141 and AD8142 both have a disable feature that, when asserted, produces high-Z outputs, allowing line isolation and easy multiplexing. The AD8141 and AD8142 are available in a 24-lead 4 mm × 4 mm LFCSP and operate over a temperature range of −40°C to +85°C. They can be used with the AD8145 triple differential-to-single- ended receiver, AD8123 triple equalizer, AD8120 triple delay line, and the AD8117 or AD8175 crosspoint switches to produce a high resolution video distribution system. |
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