Dual Ultrafast

Voltage Comparator

ADCMP567

Rev. 0

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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 pulsewidth

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’ 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 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 PECL 10 K

and 10 KH logic families. The outputs provide sufficient drive

current to directly drive transmission lines terminated in 50 Ω

track-and-hold, or sample-and-hold modes of operation.

The ADCMP567 is available in a 32-lead LFCSP package.