Dual Ultrafast
Voltage Comparator
ADCMP565
FEATURES
FUNCTIONAL BLOCK DIAGRAM
300 ps propagation delay input to output
50 ps propagation delay dispersion
Differential ECL compatible outputs
Differential latch control
NONINVERTING
INPUT
Q OUTPUT
Q OUTPUT
ADCMP565
INVERTING
INPUT
Robust input protection
Input common-mode range −2.0 V to +3.0 V
Input differential range 5 V
Power supply sensitivity greater than 65 dB
200 ps minimum pulsewidth
LATCH ENABLE
INPUT
LATCH ENABLE
INPUT
02820-0-001
Figure 1.
5 GHz equivalent input rise time bandwidth
Typical output rise/fall of 160 ps
SPT 9689 replacement
GENERAL DESCRIPTION
The ADCMP565 is an ultrafast voltage comparator fabricated
on Analog Devices’ proprietary XFCB process. The device
features 300 ps propagation delay with less than 50 ps overdrive
dispersion. Overdrive dispersion, a particularly important
characteristic of high speed comparators, is a measure of the
difference in propagation delay under differing overdrive
conditions.
APPLICATIONS
High speed instrumentation
Scope and logic analyzer front ends
Window comparators
High speed line receivers and signal restoration
Threshold detection
A fast, high precision differential input stage permits consis-
tent propagation delay with a wide variety of signals in the
common-mode range from −2.0 V to +3.0 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 latch input is included, which permits tracking,
track-and-hold, or sample-and-hold modes of operation.
Peak detection
High speed triggers
Patient diagnostics
Disk drive read channel detection
Hand-held test instruments
Zero-crossing detectors
Clock drivers
Automatic test equipment
The ADCMP565 is available in a 20-lead PLCC package.
Rev. 0
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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.
Specifications subject to change without notice. No license is granted by implication
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