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a

AD53033

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

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

Fax: 781/326-8703

© Analog Devices, Inc., 1999

High Performance Driver/Comparator

on a Single Chip

FUNCTIONAL BLOCK DIAGRAM

DRIVER

COMPARATOR

50

1.0 A/K

51

52

39

40

41

32

AD53033

VLDCPL

2, 5, 8

9, 33, 44, 46, 48

PWRGND

ECLGND

HQGND2

THERM

31

50

49

42

43

38

37

45

47

VH

VTERM

DATA

IOD

RLD

HCOMP

LEH

QH

QHB

QL

LEL

LCOMP

NC = NO CONNECT

DATAB

IODB

RLDB

LEHB

QLB

LELB

NC

VHDCPL

FEATURES

250 MHz Operation

Driver/Comparator Included

52-Lead LQFP Package with Built-in Heat Sink

APPLICATIONS

Automatic Test Equipment

Semiconductor Test Systems

Board Test Systems

Instrumentation and Characterization Equipment

PRODUCT DESCRIPTION

The AD53033 is a single chip that performs the pin electronics

functions of driver and comparator (D-C) in ATE VLSI and

memory testers.

The driver is a proprietary design that features three active

states: Data High Mode, Data Low Mode and Term Mode as

well as an Inhibit State. This facilitates the implementation of

high speed active termination. The output voltage range is –3 V

to +8 V to accommodate a wide variety of test devices. The

output leakage is typically less than 250 nA over the entire sig-

nal range.

The dual comparator, with an input range equal to the driver

output range, features built-in latches and ECL-compatible

outputs. The outputs are capable of driving 50

Ω signal lines

terminated to –2 V. Signal tracking capability is upwards of

5 V/ns.

Also included on the chip is an onboard temperature sensor

whose purpose is to give an indication of the surface tempera-

ture of the D-C. This information can be used to measure

θ

JC

and

θ

sensor is a current sink that is proportional to absolute tempera-

ture. The gain is trimmed to a nominal value of 1.0

µA/K. As

an example, the output current can be sensed by using a 10 k

Ω

resistor connected from +10 V to the THERM (IOUT) pin. A

voltage drop across the resistor will be developed that equals:

10K

× 1 µA/K = 10 mV/K = 2.98 V at room temperature.