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Analog Devices Semiconductor Electronic Components Datasheet

AD8598 Datasheet

Dual 7 ns Single Supply Comparator

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AD8598 pdf
a
FEATURES
7 ns Propagation Delay
Single Supply Operation: +3 V to +10 V
Low Power
Symmetrical Layout
Latch Function
TSSOP Packages
APPLICATIONS
Clock Recovery and Clock Distribution
High Speed Data
Line Receivers
Phase Detectors
Digital Communications
I and Q Detection
High Speed Sampling
Upgrade for MAX912
Satellite Receivers
PCMCIA Cards
Wireless Data Links
Battery Operated Instrumentation
GENERAL DESCRIPTION
The AD8598 is a dual 7 ns comparator with digital latches.
Separate supplies enable the input stage to be operated from
+5 V to as high as ± 5 V.
Ultrafast 7 ns propagation delay makes the AD8598 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 AD8598 a good
choice for clock recovery, since the duty cycle of the output will
match the duty cycle of the input.
The AD8598 has the same pinout as the DIP version of the
AD9698. For a single comparator like the AD8598, please refer
to the AD8561 data sheet.
The AD8598 is specified over the industrial (–40°C to +85°C)
temperature range. The AD8598 is available in both the 16-lead
plastic DIP, 16-lead TSSOP or narrow R-16A surface mount
packages.
Dual 7 ns
Single Supply Comparator
AD8598
PIN CONFIGURATIONS
N-16, RU-16 and R-16A
QA 1
QA 2
GND 3
LEA 4
NC 5
V– 6
IN A– 7
IN A+ 8
16 QB
15 QB
AD8598
TOP VIEW
(Not to Scale)
14 GND
13 LEB
12 NC
11 V+
10 IN B–
9 IN B+
NC = NO CONNECT
REV. A
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998


Analog Devices Semiconductor Electronic Components Datasheet

AD8598 Datasheet

Dual 7 ns Single Supply Comparator

No Preview Available !

AD8598 pdf
AD8598–SPECIFICATIONS
ELECTRICAL SPECIFICATIONS (@ V+ = +5.0 V, V– = VGND = 0 V, TA = +25؇C unless otherwise noted)
Parameter
Symbol Conditions
Min Typ Max
INPUT CHARACTERISTICS
Offset Voltage
VOS
Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Input Capacitance
VOS/T
IB
IB
IOS
VCM
CMRR
AVO
CIN
–40°C TA +85°C
VCM = 0 V
–40°C TA +85°C
VCM = 0 V
0 V VCM +3.0 V
RL = 10 k
2.3 7
8
4
–6 –3
–7 –3.5
±4
0.0 +3.0
65 85
+3,000
3.0
LATCH ENABLE INPUT
Logic “1” Voltage Threshold
Logic “0” Voltage Threshold
Logic “1” Current
Logic “0” Current
Latch Enable
Pulsewidth
Setup Time
Hold Time
VIH
VIL
IIH
IIL
tPW(E)
tS
tH
VLH = +3.0 V
VLL = +0.3 V
+2.0 +1.65
+1.60 +0.8
–1.0 –0.3
–4 –2
6
1
1.2
DIGITAL OUTPUTS
Logic “1” Voltage
Logic “1” Voltage
Logic “0” Voltage
VOH IOH = –50 µA, VIN > 250 mV
VOH IOH = –3.2 mA, VIN > 250 mV
VOL IOL = 3.2 mA, VIN > 250 mV
+3.5
+2.4 +3.5
+0.25 +0.4
DYNAMIC PERFORMANCE␣
Propagation Delay
Propagation Delay
Differential Propagation Delay
(Rising Propagation Delay vs.
Falling Propagation Delay)
Rise Time
Fall Time
tP
tP
tP
200 mV Step with 100 mV Overdrive
–40°C TA +85°C
100 mV Step with 5 mV Overdrive
100 mV Step with 100 mV Overdrive1
20% to 80%
80% to 20%
6.75 9.8
8 13
8
0.5 2.0
3.8
1.5
POWER SUPPLY␣
Power Supply Rejection Ratio
Positive Supply Current (V+ Pin)
PSRR
I+
Ground Supply Current (GND Pins) IGND
Analog Supply Current (V– Pin)
I–
+4.5 V V+ +5.5 V
–40°C TA +85°C
VO = 0 V, RL =
–40°C TA +85°C
–40°C TA +85°C
50 65
9.0 12.0
15.0
4.4 6.6
7.6
4.6 9.0
11.0
NOTES
1Guaranteed by design.
Specifications subject to change without notice.
Units
mV
mV
µV/°C
µA
µA
µA
V
dB
V/V
pF
V
V
µA
µA
ns
ns
ns
V
V
V
ns
ns
ns
ns
ns
ns
dB
mA
mA
mA
mA
mA
mA
–2– REV. A


Part Number AD8598
Description Dual 7 ns Single Supply Comparator
Maker Analog Devices
Total Page 11 Pages
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