+ + High Speed, Triple Differential Receiver with Comparators Data Sheet AD8145 FEATURES FUNCTIONAL BLOCK DIAGRAM High speed: 500 MHz, 2000 V/s G = 1, V = 2 V p-p OUT 0.1 dB flatness out to 75 MHz 32 31 30 29 28 27 26 25 High CMRR: 69 dB 10 MHz C High differential input impedance: 1 M GND 1 R 24 GND Wide input common-mode range: 3.5 V (5 V supplies) R 2 23 REF G OUT B + On-chip, gain setting resistors can be configured for gain of 1 or 2 C Fast settling: 15 ns to 0.1% 2 V p-p GAIN G 3 22 OUT G R R Low input referred noise: 13 nV/Hz 4 21 IN+ G OUT R Disable feature + Small packaging: 32-lead, 5 mm 5 mm LFCSP IN G 5 20 V S+ AD8145 AEC-Q10 qualified (AD8145W) REF R 6 + 19 COMPB IN+ C B 7 GAIN R 18 COMPB IN APPLICATIONS 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 Qualified for automotive applications Automotive driver assistance (AD8145W) Figure 1. Automotive Infotainment (AD8145W) 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 specifically 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 The AD8145W is the automotive grade version that is qualified common-mode voltages, to receive digital signals or as general- for use in automotive applications. See the Automotive Products purpose comparators. The AD8145 can be used in conjunction section for more details. with the AD8133 or AD8134 triple differential drivers to provide a 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 of 40C to +105C. The excellent common-mode rejection (69 dB 10 MHz) of 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 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. 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Technical Support www.analog.com GND GND IN+ R IN B + IN R IN+ B COMPA IN+ GAIN B COMPA IN REF B COMPA OUT DIS/PD COMPB OUT V S GND GND 06307-001 AD8145 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Applications Information .............................................................. 15 Applications ....................................................................................... 1 Overview ..................................................................................... 15 Functional Block Diagram .............................................................. 1 Basic Closed-Loop Gain Configurations ................................ 15 General Description ......................................................................... 1 Terminating the Input................................................................ 16 Revision History ............................................................................... 2 Input Clamping ........................................................................... 17 Specif icat ions ..................................................................................... 3 PCB Layout Considerations ...................................................... 18 Absolute Maximum Ratings ............................................................ 7 Driving a Capacitive Load ......................................................... 19 Thermal Resistance ...................................................................... 7 Power-Down ............................................................................... 19 Maximum Power Dissipation ..................................................... 7 Comparators ............................................................................... 19 ESD Caution .................................................................................. 7 Sync Pulse Extraction Using Comparators ............................. 20 Pin Configuration and Function Description .............................. 8 Outline Dimensions ....................................................................... 21 Typical Performance Characteristics ............................................. 9 Ordering Guide .......................................................................... 21 Theory of Operation ...................................................................... 14 Automotive Products ................................................................. 21 REVISION HISTORY 12/14Rev. A to Rev. B Changes to Applications Section and General Description Section ................................................................................................ 1 Changes to Figure 3 and Table 5 ..................................................... 8 Changes to Figure 45 ...................................................................... 21 Updated Outline Dimensions ....................................................... 21 Changes to Ordering Guide .......................................................... 21 Moved Automotive Products Section .......................................... 21 Changes to Automotive Products Section ................................... 21 1/10Rev. 0 to Rev. A Changes to Features Section, Applications Section, and General Description Section .......................................................................... 1 Changes to Table 1 ............................................................................ 3 Changes to Table 2 ............................................................................ 5 Added Automotive Products Section .......................................... 19 Added Exposed Paddle Notation to Outline Dimensions ........ 21 Changes to Ordering Guide .......................................................... 21 10/06Revision 0: Initial Version Rev. B Page 2 of 21