Rail-to-Rail, Fast, Low Power 2.5 V to 5.5 V,

Single-Supply TTL/CMOS Comparator

ADCMP609

Rev. 0

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FEATURES

Low glitch CMOS-/TTL-compatible output stage

40 ns propagation delay

Low power 1 mW at 2.5 V

Shutdown pin

Programmable hysteresis

Power supply rejection > 60 dB

−40°C to +125°C operation

APPLICATIONS

High speed instrumentation

Clock and data signal restoration

Logic level shifting or translation

High speed line receivers

Threshold detection

Peak and zero-crossing detectors

High speed trigger circuitry

Pulse-width modulators

Current-/voltage-controlled oscillators

FUNCTIONAL BLOCK DIAGRAM

ADCMP609

NONINVERTING

INPUT

INVERTING

INPUT

Q OUTPUT

+

–

Figure 1.

GENERAL DESCRIPTION

The ADCMP609 is a fast comparator fabricated on XFCB2, an

Analog Devices, Inc. proprietary process. These comparators

are exceptionally versatile and easy to use. Features include an

CMOS-compatible output drivers, and adjustable hysteresis

and/or shutdown inputs.

The device offers 40 ns propagation delay driving a 15 pF load

with 10 mV overdrive on 500 μA typical supply current.

A flexible power supply scheme allows the devices to operate

with a single +2.5 V positive supply and a −0.2 V to +3.0 V

input signal range up to a +5.5 V positive supply with a −0.2 V

to +5.7 V input signal range.

The TTL-/CMOS-compatible output stage is designed to drive

up to 15 pF with full rated timing specifications and to degrade

in a graceful and linear fashion as additional capacitance is added.

The comparator’s input stage offers robust protection against

large input overdrive, and the outputs do not phase reverse

when the valid input signal range is exceeded. A programmable

hysteresis features is also provided.

The ADCMP609, available in an 8-lead MSOP package, features

a shutdown pin and hysteresis control.