Ultrafast 7 ns a Single Supply Comparator AD8561 FEATURES PIN CONFIGURATIONS 7 ns Propagation Delay at 5 V Single Supply Operation: 3 V to 10 V 8-Lead Plastic DIP Low Power 8-Lead Narrow Body (N-8) Latch Function SOIC ( R-8) TSSOP Packages APPLICATIONS 1 8 V OUT V OUT High Speed Timing IN OUT 2 7 IN OUT Clock Recovery and Clock Distribution IN GND 3 6 IN GND V LATCH Line Receivers 4 5 AD8561 V LATCH AD8561 Digital Communications Phase Detectors High Speed Sampling Read Channel Detection 8-Lead TSSOP PCMCIA Cards (RU-8) Upgrade for LT1016 Designs V 1 8 OUT IN OUT AD8561 GND IN GENERAL DESCRIPTION LATCH V 45 The AD8561 is a single 7 ns comparator with separate input and output sections. Separate supplies enable the input stage to be operated from 5 V dual supplies and +5 V single supplies. Fast 7 ns propagation delay makes the AD8561 a good choice for timing circuits and line receivers. Propagation delays for rising and falling signals are closely matched and track over temperature. This matched delay makes the AD8561 a good choice for clock recovery, since the duty cycle of the output will match the duty cycle of the input. The AD8561 has the same pinout as the LT1016, with lower supply current and a wider common-mode input range, which includes the negative supply rail. The AD8561 is specified over the industrial (40C to +85C) temperature range. The AD8561 is available in the 8-lead plastic DIP, 8-lead TSSOP, and 8-lead narrow SOIC surface- mount packages. Rev. D 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 19982014 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 AD8561SPECIFICATIONS ELECTRICAL SPECIFICATIONS ( V+ = +5.0 V, V = V = 0 V, T = +25 C unless otherwise noted) GND A Parameter Symbol Conditions Min Typ Max Units INPUT CHARACTERISTICS Offset Voltage V 2.3 7 mV OS 40C T +85C8mV A Offset Voltage Drift V /T4 V/C OS Input Bias Current I V = 0 V 6 3 A B CM I 40C T +85C 7 3.5 A B A Input Offset Current I V = 0 V 4 A OS CM Input Common-Mode Voltage Range V 0.0 +3.0 V CM Common-Mode Rejection Ratio CMRR 0 V V +3.0 V 65 85 dB CM Large Signal Voltage Gain A R = 10 k 3000 V/V VO L Input Capacitance C 3.0 pF IN LATCH ENABLE INPUT Logic 1 Voltage Threshold V 2.0 1.65 V IH Logic 0 Voltage Threshold V 1.60 0.8 V IL Logic 1 Current I V = 3.0 V 1.0 0.3 A IH LH Logic 0 Current I V = 0.3 V 4 2 A IL LL Latch Enable Pulsewidth t 6ns PW(E) Setup Time t 1ns S Hold Time t 1.2 ns H DIGITAL OUTPUTS Logic 1 Voltage V I = 50 A, V > 250 mV 3.5 V OH OH IN Logic 1 Voltage V I = 3.2 mA, V > 250 mV 2.4 3.5 V OH OH IN Logic 0 Voltage V I = 3.2 mA, V > 250 mV 0.25 0.4 V OL OL IN DYNAMIC PERFORMANCE Propagation Delay t 200 mV Step with 100 mV Overdrive 6.75 9.8 ns P 40C T +85C813ns A Propagation Delay t 100 mV Step with 5 mV Overdrive 8 ns P Differential Propagation Delay (Rising Propagation Delay vs. 1 Falling Propagation Delay) t 100 mV Step with 100 mV Overdrive 0.5 2.0 ns P Rise Time 20% to 80% 3.8 ns Fall Time 80% to 20% 1.5 ns POWER SUPPLY Power Supply Rejection Ratio PSRR +4.5 V V+ +5.5 V 50 65 dB Positive Supply Current I+ 4.5 6.0 mA 40C T +85C 7.5 mA A Ground Supply Current I V = 0 V, R = 2.2 3.3 mA GND O L 40C T +85C 3.8 mA A Analog Supply Current I 2.3 4.5 mA 40C T +85C 5.5 mA A NOTES 1 Guaranteed by design. Specifications subject to change without notice. Rev. D 2