PRELIMINARY TECHNICAL DATA
Dual Ultrafast
Voltage Comparator
a
Preliminary Technical Data
AD53519
FEATURES
Robust Input Protection
FUNCTIONAL BLOCK DIAGRAM
300 ps Propagation Delay Input to Output
75 ps Propagation Delay Variation
Differential ECL Compatible Outputs
Differential Latch Control
NONINVERTING
INPUT
Q OUTPUT
/Q OUTPUT
+
-
Power Supply Rejection Greater than 70 dB
200ps Minimum Pulse Width (Bandwidth > 2.5
GHz)
INVERTING
INPUT
5 Gbps Toggle Rate
Typical Output Rise/Fall of 150 ps
APPLICATIONS
/LATCH ENABLE
INPUT
LATCH ENABLE
INPUT
Automatic Test Equipment
High Speed Instrumentation
Scope & Logic Analyzers Front End
Window Comparators
Figure 1
High Speed Line Receivers
Threshold Detection
Peak Detection
High Speed Triggers
Patient Diagnostics
Disk Drive Read Channel Detection
Hand-Held Test Instruments
Zero Crossing Detectors
Line Receivers & Signal Restoration
Clock Driver
Upgrade for SPT9689 Designs
Upgrade for AD96687 Designs
mode range from –2.0 V to +3.0 V. Outputs are
GENERAL DESCRIPTION
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 latch input is included which permits tracking,
track-hold, or sample-hold modes of operation.
The AD53519 is an ultrafast voltage comparator fabricated on
ADI’s proprietary XFCB process. The device features 300 ps
propagation delay with better than 75 ps overdrive dispersion.
Dispersion is a particularly important characteristic of high
speed comparators. It is a measure of the difference in
propagation delay under differing overdrive conditions.
The AD53519 is available in a 20-lead PLCC package.
A fast, high precision differential input stage permits consistent
propagation delay with a wide variety of signals in the common
REV. Pr J July 22, 2002
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 that 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
Fax: 781/326-8703
www.analog.com
© Analog Devices, Inc., 2002