Datasheet AD8145 (Analog Devices)

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High Speed, Triple Differential Receiver with Comparators Data Sheet AD8145 FEATURES FUNCTIONAL BLOCK DIAGRAM High speed: 500 MHz, 2000 V/µs @ G = 1, VOUT = 2 V p-p _B N_B PD _B F 0.1 dB flatness out to 75 MHz ND AI IS/ S– ND IN–_B G IN+ G RE D V G High CMRR: 69 dB @ 10 MHz 32 31 30 29 28 27 26 25 High differential input impedance: 1 MΩ C GND 1 R 24 GND – + Wide input common-mode range: ±3.5 V (±5 V supplies) – + R On-chip, gain setting resistors can be configured for gain of 1 or 2 REF_G 2 23 + OUT_B C – Fast settling: 15 ns to 0.1% @ 2 V p-p GAIN_G 3 22 OUT_G Low input referred noise: 13 nV/√Hz R R Disable feature IN+_G 4 21 OUT_R + Small packaging: 32-lead, 5 mm × 5 mm LFCSP – IN–_G 5 20 V AEC-Q10 qualified (AD8145W) S+ AD8145 REF_R 6 + 19 COMPB_IN+ C – B APPLICATIONS GAIN_R 7 18 COMPB_IN– A R R RGB video receivers GND 8 + – 17 GND YPbPr video receivers 9 10 11 12 13 14 15 16 Keyboard, video, mouse (KVM) Unshielded twisted pair (UTP) receivers ND _R N+ N– UT UT ND G G IN–_R IN+ A_I A_I Qualified for automotive applications P P A_O B_O P P M M
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M M Automotive driver assistance (AD8145W) CO CO CO CO
06307-
Automotive Infotainment (AD8145W)
Figure 1.
GENERAL DESCRIPTION
The AD8145 is a triple, low cost, differential-to-single-ended The AD8145 can be configured for a differential-to-single-ended receiver specifical y designed for receiving red-green-blue (RGB) gain of 1 or 2 by connecting the GAIN_x pin of each channel to video signals over twisted pair cable or differential printed circuit its respective output (G = 1) or connecting it to a reference voltage board (PCB) traces. It can also be used to receive any type of (G = 2), which is normally grounded. analog signal or high speed data transmission. Two auxiliary A REF_x input is provided on each channel that allows designers to comparators with hysteresis are provided that can be used to level shift the output signals. decode video sync signals, which are encoded on the received common-mode voltages, to receive digital signals or as general- The AD8145W is the automotive grade version that is qualified purpose comparators. The AD8145 can be used in conjunction for use in automotive applications. See the Automotive Products with the AD8133 or AD8134 triple differential drivers to provide a section for more details. complete low cost solution for RGB over Category 5 UTP cable The AD8145 is available in a 5 mm × 5 mm, 32-lead LFCSP and applications, including KVM. is rated to work over the extended industrial temperature range The excellent common-mode rejection (69 dB @ 10 MHz) of of −40°C to +105°C. the AD8145 allows for the use of low cost, unshielded twisted pair cables in noisy environments.
Rev. B 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 rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2006–2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION OVERVIEW BASIC CLOSED-LOOP GAIN CONFIGURATIONS TERMINATING THE INPUT INPUT CLAMPING PCB LAYOUT CONSIDERATIONS Minimizing Parasitic Feedback Reactances Maximizing Heat Removal DRIVING A CAPACITIVE LOAD POWER-DOWN COMPARATORS SYNC PULSE EXTRACTION USING COMPARATORS OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS