Datasheet AD8143 (Analog Devices)

High Speed, Triple Differential Receiver with Comparators Data Sheet AD8143 FEATURES PIN CONFIGURATION High speed _B 160 MHz large signal bandwidth – – S GND IN IN+_B FB_B REF_B DIS/PD V GND 1000 V/µs slew rate at G = 1, VO = 2 V p-p 32 31 30 29 28 27 26 25 High CMRR: 65 dB at 10 MHz High differential input impedance: 5 MΩ GND 1 24 GND Input common-mode range: ±10.5 V (±12 V supplies) REF_G 2 23 OUT_B User-adjustable gain Wide power supply range: +5 V to ±12 V FB_G 3 22 OUT_G Fast settling: 8 ns to 1% IN+_G 4 21 OUT_R Disable feature AD8143 Low offset: ±3.4 mV on 5 V supply IN–_G 5 20 VS+ 2 on-chip comparators REF_R 6 19 COMPB_IN+ Small packaging: 32-lead, 5 mm × 5 mm LFCSP B FB_R 7 A 18 COMPB_IN– APPLICATIONS GND 8 17 GND RGB video receivers Keyboard-video-mouse (KVM) 9 10 11 12 13 14 15 16 Unshielded twisted pair (UTP) receivers – _R – GND GND IN+_R IN COMPA_IN+ COMPA_IN COMPA_OUT COMPB_OUT
05538-001 Figure 1.
GENERAL DESCRIPTION
The AD8143 has a wide power supply range from single +5 V The AD8143 is a triple, low cost, differential-to-single- supply to ±12 V, which allows for a wide common-mode range. ended receiver specifically designed for receiving red- The wide common-mode input range of the AD8143 maintains green-blue (RGB) signals over twisted pair cable. It can signal integrity in systems where the ground potential is a few also be used for receiving any type of analog signal or volts different between the drive and receive ends without the high speed data transmission. Two auxiliary comparators use of isolation transformers. are provided to receive digital or sync signals. The The AD8143 is stable at a gain of 1. Closed-loop gain is easily AD8143 can be used in conjunction with the AD8133 set using external resistors. and AD8134 triple, differential drivers to provide a complete low cost solution for RGB over Category-5 The AD8143 is available in a 5 mm × 5 mm, 32-lead LFCSP and UTP cable applications, including KVM. is rated to work over the extended industrial temperature range of −40°C to +85°C. The excellent common-mode rejection (65 dB at 10 MHz) of the AD8143 allows for the use of low cost unshielded twisted pair cables in noisy environments.
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Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Maximum Power Dissipation ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION OVERVIEW BASIC CLOSED-LOOP GAIN CONFIGURATIONS TERMINATING THE INPUT INPUT CLAMPING PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS Minimizing Parasitic Reactances in the Feedback Network Maximizing Heat Removal DRIVING A CAPACITIVE LOAD POWER-DOWN COMPARATORS SYNC PULSE EXTRACTION USING COMPARATORS OUTLINE DIMENSIONS ORDERING GUIDE