Rail-to-Rail, Very Fast, 2.5 V to 5.5 V, Single-Supply LVDS Comparator Data Sheet AD8465 FEATURES FUNCTIONAL BLOCK DIAGRAM V V CCO CCI Fully specified rail to rail at V = 2.5 V to 5.5 V CCI Input common-mode voltage from 0.2 V to V + 0.2 V CCI Low glitch LVDS-compatible output stage V NONINVERTING P Propagation delay: 1.6 ns INPUT Q OUTPUT Power dissipation: 37 mW at 2.5 V AD8465 LVDS Shutdown pin Q OUTPUT V INVERTING N INPUT Single-pin control for programmable hysteresis and latch Power supply rejection > 60 dB 40C to +125C operation LE/HYS INPUT APPLICATIONS S INPUT DN Figure 1. High speed instrumentation Clock and data signal restoration Logic level shifting or translation Pulse spectroscopy High speed line receivers Threshold detection Peak and zero-crossing detectors High speed trigger circuitry Pulse-width modulators Current-/voltage-controlled oscillators Automatic test equipment (ATE) Qualified for automotive applications GENERAL DESCRIPTION A flexible power supply scheme allows the devices to operate The AD8465 is a very fast comparator fabricated on the Analog with a single 2.5 V positive supply and a 0.5 V to +2.7 V input Devices, Inc., proprietary XFCB2 process. This comparator is signal range up to a 5.5 V positive supply with a 0.5 V to +5.7 V exceptionally versatile and easy to use. Features include an input signal range. Split input/output supplies, with no sequencing input range from V 0.5 V to V + 0.2 V, low noise, LVDS- EE CCI restrictions, support a wide input signal range with greatly compatible output drivers, and TTL/CMOS latch inputs with reduced power consumption. adjustable hysteresis and/or shutdown inputs. The LVDS-compatible output stage is designed to drive any The device offers 1.6 ns propagation delay with 1 ps rms standard LVDS input. The comparator input stage offers robust random jitter (RJ). Overdrive and slew rate dispersion are protection against large input overdrive, and the outputs do not typically less than 50 ps. phase reverse when the valid input signal range is exceeded. High speed latch and programmable hysteresis features are also provided in a unique single-pin control option. The AD8465 is available in a 12-lead LFCSP. 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. No Tel: 781.329.4700 20092014 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com 07958-001AD8465 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Application Information ................................................................ 10 Applications ....................................................................................... 1 Power/Ground Layout and Bypassing ..................................... 10 Functional Block Diagram .............................................................. 1 LVDS-Compatible Output Stage .............................................. 10 General Description ......................................................................... 1 Using/Disabling the Latch Feature ........................................... 10 Revision History ............................................................................... 2 Optimizing Performance ........................................................... 10 Specifications ..................................................................................... 3 Comparator Propagation Delay Dispersion ........................... 11 Electrical Characteristics ............................................................. 3 Comparator Hysteresis .............................................................. 11 Timing Information ......................................................................... 5 Crossover Bias Points ................................................................. 12 Absolute Maximum Ratings ............................................................ 6 Minimum Input Slew Rate Requirement ................................ 12 Thermal Resistance ...................................................................... 6 Typical Application Circuits ......................................................... 13 ESD Caution .................................................................................. 6 Outline Dimensions ....................................................................... 14 Pin Configuration and Function Descriptions ............................. 7 Ordering Guide .......................................................................... 14 Typical Performance Characteristics ............................................. 8 Automotive Products ................................................................. 14 REVISION HISTORY 12/14Rev. A to Rev. B Changes to Applications Section .................................................... 1 Changes to Table 4 ............................................................................ 6 Changes to Figure 3 and Table 5 ..................................................... 7 Changes to Figure 26 ...................................................................... 14 Updated Outline Dimensions ....................................................... 14 Changes to Ordering Guide .......................................................... 14 Added Automotive Products Section........................................... 14 11/11Rev. 0 to Rev. A Changed V = 0.4 V to V = 0.8 V in Conditions of I , IL IL IL Table 1 ................................................................................................ 3 4/09Revision 0: Initial Version Rev. B Page 2 of 14