a
FEATURES
250 MHz Operation
Driver/Comparator and Active Load Included
On-Chip Schottky Diode Bridge
52-Lead LQFP Package with Built-in Heatsink
High Performance Driver/Comparator
Active Load on a Single Chip
AD53032
FUNCTIONAL BLOCK DIAGRAM
V
CC
VH
47
VTERM
45
DATA
37
DATA
38
IOD
43
IOD
42
RLD
49
RLD
50
V
L 31
HCOMP
LEH
LEH
QH
QHB
COMPARATOR
QL
QL
LEL
LEL
LCOMP
ACTIVE LOAD
VCOMI
IOLC
IOLRTN
V/I
+1
VCOMS
IOL
DRIVER
50
V
OUT
VLDCPL
V
CC
V
CC
V
CC
51
52
34
V
EE
39
V
EE
V
EE
V
EE
40
41
32
39nF
CHDCPL
APPLICATIONS
Automatic Test Equipment
Semiconductor Test Systems
Board Test Systems
Instrumentation and Characterization Equipment
AD53032
VHDCPL
39nF
CLDCPL
PRODUCT DESCRIPTION
The AD53032 is a single chip that performs the pin electronics
functions of driver, comparator and active load in ATE VLSI
and memory testers. In addition, a Schottky diode bridge for the
active load and a VCOM buffer are included internally.
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 鈥? 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
鈩?/div>
signal lines
terminated to 鈥? V. Signal tracking capability is upwards of
5 V/ns.
The active load can be set for up to 35 mA load current with
less than a 10
碌A
linearity error through the entire set range.
I
OH
, I
OL
and the buffered VCOM are independently adjustable.
Onboard Schottky diodes provide high speed switching and low
capacitance.
Also included on the chip is an onboard temperature sensor
whose purpose is to give an indication of the surface tempera-
ture of the DCL. This information can be used to measure
胃
JC
and
胃
JA
or flag an alarm if proper cooling is lost. Output from
the sensor is a current sink that is proportional to absolute tem-
perature. The gain is trimmed to a nominal value of 1.0
碌A/K.
As an example, the output current can be sensed by using a
10 k鈩?resistor connected from +10 V to the THERM (IOUT) pin.
A voltage drop across the resistor will be developed that equals:
10K
脳
1
碌A/K
= 10 mV/K = 2.98 V at room temperature.
IOHRTN
INHL
36
INHL
35
IOHC
V/I
9,33,44,46,48
2,5,8
IOH
THERM
1.0 A/K
NC
PWRGND
ECLGND
HQGND2
HQGND
NC = NO CONNECT
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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
漏 Analog Devices, Inc., 1998
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