REV. B

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a

Ultrafast

TTL Comparators

AD9696/AD9698

FEATURES

4.5 ns Propagation Delay

200 ps Maximum Propagation Delay Dispersion

Single +5 V or

5 V Supply Operation

Complementary Matched TTL Outputs

APPLICATIONS

High Speed Line Receivers

Peak Detectors

Window Comparators

High Speed Triggers

Ultrafast Pulse Width Discriminators

Both devices allow the use of either a single +5 V supply or

±5 V supplies. The choice of supplies determines the common

mode input voltage range available: –2.2 V to +3.7 V for

±5 V

operation, +1.4 V to +3.7 V for single +5 V supply operation.

The differential input stage features high precision, with offset

voltages that are less than 2 mV and offset currents less than

1

µA. A latch enable input is provided to allow operation in ei-

ther sample-and-hold or track-and-hold applications.

The AD9696 and AD9698 are both available as commercial

temperature range devices operating from ambient temperatures

of 0

°C to +70°C, and as extended temperature range devices for

ambient temperatures from –55

°C to +125°C. Both versions are

available qualified to MIL-STD-883 class B.

Package options for the AD9696 include a 10-pin TO-100 metal

can, an 8-pin ceramic DIP, an 8-pin plastic DIP, and an 8-lead

small outline plastic package. The AD9698 is available in a

16-pin ceramic DIP, a 16-lead ceramic gullwing, a 16-pin plastic

DIP and a 16-lead small outline plastic package. Military quali-

fied versions of the AD9696 come in the TO-100 can and

ceramic DIP; the dual AD9698 comes in ceramic DIP.

GENERAL DESCRIPTION

The AD9696 and AD9698 are ultrafast TTL-compatible volt-

age comparators able to achieve propagation delays previously

possible only in high performance ECL devices. The AD9696 is

a single comparator providing 4.5 ns propagation delay, 200 ps

maximum delay dispersion and 1.7 ns setup time. The AD9698

is a dual comparator with equally high performance; both de-

vices are ideal for critical timing circuits in such applications as

ATE, communications receivers and test instruments.

FUNCTIONAL BLOCK DIAGRAM

AD9696/AD9698 Architecture

AD9698

#1

OUTPUT

INPUT

LATCH

GAIN

LEVEL

SHIFT

AD9696

NONINVERTING

INPUT

INVERTING

INPUT

LATCH

ENABLE

Q OUTPUT

Q OUTPUT

NONINVERTING

INPUT

INVERTING

INPUT

LATCH

ENABLE

Q OUTPUT

Q OUTPUT

#2

NONINVERTING

INPUT

INVERTING

INPUT

LATCH

ENABLE

Q OUTPUT

Q OUTPUT

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U.S.A.

Tel: 617/329-4700

World Wide Web Site: http://www.analog.com

Fax: 617/326-8703

© Analog Devices, Inc., 1997