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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
50V
1.0mA/K
V
CC
V
CC
V
CC
V
EE
V
EE
V
EE
V
EE
51 52 39 40 4132
AD53033
V
OUT
VLDCPL
2, 5, 89, 33, 44, 46, 48
PWRGND ECLGND HQGND2
THERM
31
50
49
42
43
38
37
45
47VH
VTERM
DATA
IOD
RLD
V
L
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 W 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 q
JC
and q
JA
or flag an alarm if proper cooling is lost. Output from the
sensor is a current sink that is proportional to absolute tempera-
ture. The gain is trimmed to a nominal value of 1.0 m A/K. As
an example, the output current can be sensed by using a 10 kW
resistor connected from +10 V to the THERM (IOUT) pin. A
voltage drop across the resistor will be developed that equals:
10K · 1 m A/K = 10 mV/K = 2.98 V at room temperature.