AD8561 Analog Devices, AD8561 Datasheet

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AD8561

Manufacturer Part Number
AD8561
Description
Ultrafast 7 ns Single Supply Comparator
Manufacturer
Analog Devices
Datasheet

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a
GENERAL DESCRIPTION
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 (–40 C to +85 C)
temperature range. The AD8561 is available in both the 8-lead
plastic DIP, 8-lead TSSOP or narrow SO-8 surface mount
packages.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
7 ns Propagation Delay at 5 V
Single Supply Operation: 3 V to 10 V
Low Power
Latch Function
TSSOP Packages
APPLICATIONS
High Speed Timing
Clock Recovery and Clock Distribution
Line Receivers
Digital Communications
Phase Detectors
High Speed Sampling
Read Channel Detection
PCMCIA Cards
Upgrade for LT1016 Designs
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
8-Lead Narrow Body SO
V
V
IN
IN
AD8561
Single Supply Comparator
(SO-8)
PIN CONFIGURATIONS
OUT
OUT
GND
LATCH
World Wide Web Site: http://www.analog.com
V
V
IN
IN
8-Lead TSSOP
1
4
AD8561
(RU-8)
8
5
Ultrafast 7 ns
V
V
8-Lead Plastic DIP
IN
IN
© Analog Devices, Inc., 1998
OUT
OUT
GND
LATCH
1
2
3
4
AD8561
AD8561
(N-8)
8
7
6
5
OUT
OUT
GND
LATCH

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AD8561 Summary of contents

Page 1

... PCMCIA Cards Upgrade for LT1016 Designs GENERAL DESCRIPTION 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 ...

Page 2

... AD8561–SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Input Offset Current Input Common-Mode Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance LATCH ENABLE INPUT Logic “1” Voltage Threshold Logic “0” Voltage Threshold Logic “ ...

Page 3

... – + GND O L – + I– – + –3– AD8561 = +25 C unless otherwise noted) A Min Typ Max –6 –3 –7 –2.5 4 –5.0 +3 3000 3.0 2.0 1.65 1.60 0.8 –1 –0.5 20 – ...

Page 4

... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8561 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality +3.0 V, V– ...

Page 5

... STEP SIZE = 100mV OVERDRIVE = 5mV LOAD CAPACITANCE = 10pF COMMON-MODE VOLTAGE – Volts Figure 8. Propagation Delay vs –5– AD8561 5V, SINGLE SUPPLY S STEP SIZE = 100mV CAPACITANCE LOAD = 10pF + OVERDRIVE – ...

Page 6

... AD8561 0.5 0.4 0 – +125 SINK CURRENT – mA Figure 10. Output Low Voltage vs. Sink Current 0 –1 – –2 + –3 +125 C A –4.0 –5 SUPPLY VOLTAGE –Volts Figure 13. Analog Supply Current vs. ...

Page 7

... LT1016—input voltage range, input bias currents, speed, out- put swing and power consumption. When operated single supply, the LT1016 has an input voltage range from +1. +3.5 V. The AD8561 has a wider input range from 3.0 V. Signals above 3.0 V may result in slower response times (see Figure 8). If both signals exceed 3 ...

Page 8

... The input bias current for the AD8561 with any PNP differential input stage, this bias current will go to zero on an input that is high and will double on an input that is low. ...

Page 9

... SPICE Model * AD8561 SPICE Macro-Model Typical Values * 4/98, Ver. 1.0 * TAM / ADSC * * Node assignments * non-inverting input * | inverting input * | | * | | * | | * | | * | | * | | * | | .SUBCKT AD8561 INPUT STAGE * * PIX PIX IBIAS 99 5 800E-6 RC1 4 50 1E3 RC2 6 50 1E3 CL1 4 6 1E-12 CIN 1 2 3E-12 VCM1 ...

Page 10

... RB4 60 62 5E3 CB3 99 61 10E-12 CB4 62 50 5E-12 RO3 66 65 2E3 RO4 67 65 500 EO3 63 98 POLY(1) (20,98 EO4 98 60 POLY(1) (20,98 MODELS * .MODEL PIX PNP(BF=100,IS=1E-16) .MODEL NOX NPN(BF=100,VAF=130,IS=1E-14) .MODEL DX D(IS=1E-16) .MODEL SLATCH1 VSWITCH(ROFF=1E6,RON=500,VOFF=2.1,VON=1.4) .ENDS AD8561 –10– REV. 0 ...

Page 11

... PLANE 0.0035 (0.090) 8-Lead Small Outline IC (SO-8) 0.1968 (5.00) 0.1890 (4.80 0.1574 (4.00) 0.2440 (6.20 0.1497 (3.80) 0.2284 (5.80) PIN 1 0.0688 (1.75) 0.0196 (0.50) 0.0098 (0.25) 0.0532 (1.35) 0.0099 (0.25) 0.0040 (0.10) 8° 0.0500 0.0192 (0.49) 0° SEATING 0.0098 (0.25) 0.0500 (1.27) (1.27) 0.0138 (0.35) PLANE BSC 0.0075 (0.19) 0.0160 (0.41) –11– AD8561 0.195 (4.95) 0.115 (2.93) x 45° ...

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