Rail-to-Rail, Very Fast, 2.5 V to 5.5 V,

Single-Supply LVDS Comparator

AD8465

Rev. 0

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FEATURES

Low glitch LVDS-compatible output stage

Propagation delay: 1.6 ns

Power dissipation: 37 mW at 2.5 V

Shutdown pin

Single-pin control for programmable hysteresis and latch

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

Pulse spectroscopy

High speed line receivers

Threshold detection

Peak and zero-crossing detectors

High speed trigger circuitry

Pulse-width modulators

Current-/voltage-controlled oscillators

Automatic test equipment (ATE)

Automotive

FUNCTIONAL BLOCK DIAGRAM

INPUT

INPUT

Q OUTPUT

Q OUTPUT

LE/HYS INPUT

AD8465

LVDS

Figure 1.

GENERAL DESCRIPTION

The AD8465 is a very fast comparator fabricated on the Analog

Devices, Inc., proprietary XFCB2 process. This comparator is

exceptionally versatile and easy to use. Features include an

compatible output drivers, and TTL/CMOS latch inputs with

adjustable hysteresis and/or shutdown inputs.

The device offers 1.6 ns propagation delay with 1 ps rms

random jitter (RJ). Overdrive and slew rate dispersion are

typically less than 50 ps.

A flexible power supply scheme allows the devices to operate

with a single 2.5 V positive supply and a −0.5 V to +2.7 V input

signal range up to a 5.5 V positive supply with a −0.5 V to +5.7 V

input signal range. Split input/output supplies, with no sequencing

restrictions, support a wide input signal range with greatly

reduced power consumption.

The LVDS-compatible output stage is designed to drive any

standard LVDS input. The comparator input stage offers robust

protection against large input overdrive, and the outputs do not

phase reverse when the valid input signal range is exceeded. High

speed latch and programmable hysteresis features are also provided

in a unique single-pin control option.

The AD8465 is available in a 12-lead LFCSP.