AD96687BPZ Analog Devices Inc, AD96687BPZ Datasheet

Ultra Fast ECL Dual Comparator

AD96687BPZ

Manufacturer Part Number
AD96687BPZ
Description
Ultra Fast ECL Dual Comparator
Manufacturer
Analog Devices Inc
Type
with Latchr
Datasheet

Specifications of AD96687BPZ

Number Of Elements
2
Output Type
Complementary, ECL, Open-Emitter
Mounting Type
Surface Mount
Package / Case
20-LCC (J-Lead)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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a
GENERAL DESCRIPTION
The AD96685 and AD96687 are ultrafast voltage comparators.
The AD96685 is a single comparator with 2.5 ns propagation
delay; the AD96687 is an equally fast dual comparator. Both
devices feature 50 ps propagation delay dispersion which is a
particularly important characteristic of high-speed comparators.
It is a measure of the difference in propagation delay under
differing overdrive conditions.
A fast, high precision differential input stage permits consistent
propagation delay with a wide variety of signals in the common-
mode range from –2.5 V to +5 V. Outputs are complementary
digital signals fully compatible with ECL 10 K and 10 KH logic
families. The outputs provide sufficient drive current to directly
drive transmission lines terminated in 50 Ω to –2 V. A level
sensitive latch input which permits tracking, track-hold, or
sample-hold modes of operation is included.
The AD96685 is available in industrial –25°C to +85°C range
in 16-pin SOIC.
The AD96687 is available in industrial range –25°C to +85°C,
in 16-pin DIP, SOIC, and 20-lead PLCC.
NONINVERTING
INVERTING
INPUT
INPUT
AD96685 FUNCTIONAL BLOCK DIAGRAM
AD96687 FUNCTIONAL BLOCK DIAGRAM
LE
ENABLE
NONINVERTING
LATCH
THE OUTPUTS ARE OPEN EMITTERS, REQUIRING EXTERNAL
PULL-DOWN RESISTORS. THESE RESISTORS MAY BE IN THE
RANGE OF 50 -200
LE
INVERTING
INPUT
INPUT
Ultrafast Comparators
R
L
AD96685/AD96687
R
Q OUTPUT
Q OUTPUT
L
CONNECTED TO –2.0V, OR 200 -2000
ENABLE
LATCH
V
T
Q OUTPUT
Q OUTPUT
R
L
V
T
R
L
R
L
R
L
Q OUTPUT
Q OUTPUT
ENABLE
LE
LATCH
NONINVERTING
LE
INVERTING
INPUT
INPUT

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AD96687BPZ Summary of contents

Page 1

GENERAL DESCRIPTION The AD96685 and AD96687 are ultrafast voltage comparators. The AD96685 is a single comparator with 2.5 ns propagation delay; the AD96687 is an equally fast dual comparator. Both devices feature 50 ps propagation delay dispersion which is ...

Page 2

AD96685/AD96687–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter Temp INPUT CHARACTERISTICS Input Offset Voltage 25°C Full Input Offset Drift Full Input Bias Current 25°C Full Input Offset Current 25°C Full Input Resistance 25°C Input Capacitance 25°C 2 Input Voltage Ranges Full Common-Mode Rejection Ratio ...

Page 3

ABSOLUTE MAXIMUM RATINGS Positive Supply Voltage (+ 6 Negative Supply Voltage (– ...

Page 4

AD96685/AD96687 AD96685BR GROUND 1 GROUND NONINVERTING INPUT INVERTING AD96685 INPUT TOP VIEW Q OUTPUT NC 5 (Not to Scale) 12 LATCH ENABLE Q OUTPUT 6 ...

Page 5

Typical Performance Characteristics–AD96685/AD96687 APPLICATIONS INFORMATION The AD96685/AD96687 comparators are very high speed devices. Consequently, high speed design techniques must be employed to achieve the best performance. The most critical aspect of any AD96685/AD96687 design is the use of a low ...

Page 6

AD96685/AD96687 Typical Applications AD96685/ AD96687 REF LATCH ENABLE –2V INPUT +V OUTPUTS 50 50 –V REF 50 AD96685 AD96687 50 OUTPUT REF –2V ...

Page 7

Ceramic DIP 0.098 (2.49) MAX 0.005 (0.13) MIN 16 9 0.310 (7.87) PIN 1 0.220 (5.59 0.840 (21.34) MAX 0.060 (1.52) 0.015 (0.38) 0.200 (5.08) MAX 0.150 (3.81) 0.200 (5.08) MIN 0.125 (3.18) SEATING 0.100 0.070 (1.78) ...

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