Dual Ultrafast Voltage Comparator
Data Sheet
ADCMP567
Rev. A Document Feedback
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FEATURES
250 ps propagation delay input to output
50 ps propagation delay dispersion
Differential PECL compatible outputs
Differential latch control
Robust input protection
Input common-mode range −2.0 V to +3.0 V
Input differential range ±5 V
ESD protection >3 kV HBM, >200 V MM
Power supply sensitivity >65 dB
200 ps minimum pulse width
5 GHz equivalent input rise time bandwidth
Typical output rise/fall of 165 ps
APPLICATIONS
High speed instrumentation
Scope and logic analyzer front ends
Window comparators
High speed line receivers and signal restoration
Threshold detection
Peak detection
High speed triggers
Patient diagnostics
Disk drive read channel detection
Hand-held test instruments
Zero-crossing detectors
Clock drivers
Automatic test equipment
FUNCTIONAL BLOCK DIAGRAM
03632-0-001
NONINVERTING
INPUT
INVERTING
INPUT
LATCH ENABLE
INPUT
Q OUTPUT
Q OUTPUT
LATCH ENABLE
INPUT
ADCMP567
Figure 1.
GENERAL DESCRIPTION
The ADCMP567 is an ultrafast voltage comparator fabricated
on Analog Devices, Inc., proprietary XFCB process. The device
features 250 ps propagation delay with less than 35 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.
A fast, high precision differential input stage permits consistent
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 PECL 10 K and 10 KH logic
families. The outputs provide sufficient drive current to directly
drive transmission lines terminated in 50 Ω to V
DD
− 2 V. A latch
input is included, which permits tracking, track-and-hold, or
sample-and-hold modes of operation.
The ADCMP567 is available in a 32-lead LFCSP package.
