a
FEATURES
1000 MHz Toggle Rate
Driver/Comparator/Active Load and Dynamic Clamp
Included
Inhibit Mode Function
100-Lead LQFP Package with Built-In Heat Sink
Driver
48 Output Resistance
800 ps Tr/Tf for a 3 V Step
Comparator
1.1 ns Propagation Delay at 3 V
Load
40 mA Voltage Programmable Current Range
50 ns Settling Time to 15 mV
APPLICATIONS
Automatic Test Equipment
Semiconductor Test Systems
Board Test Systems
Instrumentation and Characterization Equipment
V
CC
VH
VTERM
DATA
DATAB
IOD
IODB
RLD
RLDB
VL
PWRD
HCOMP
VCCO
QH
QHB
V
CC
High Speed
Dual Pin Electronic
AD53522
FUNCTIONAL BLOCK DIAGRAM (One-Half)
V
CC
V
EE
V
EE
V
EE
AD53522
VCH
VHDCPL
DRIVER
OUT
VLDCPL
VCL
COMPARATOR
QL
QLB
PRODUCT DESCRIPTION
LCOMP
The AD53522 is a complete, high speed, single-chip solution
that performs the pin electronics functions of driver, comparator,
and active load (DCL) for ATE applications. In addition, the
driver contains a dynamic clamp function and the active load
contains an integrated Schottky diode bridge.
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. In conjunction with the integrated dynamic
clamp, this facilitates the implementation of a high speed active
termination. The output voltage range is 鈥?.5 V to +6.5 V to
accommodate a wide variety of test devices.
The dual comparator, with an input range equal to the driver
output range, features PECL compatible outputs. Signal tracking
capability is in the range of 3 V/ns.
The active load can be set for up to 40 mA load current. I
OH
, I
OL
,
and the buffered VCOM are independently adjustable. On-board
Schottky diodes provide high speed switching and low capacitance.
Also included is an on-board temperature sensor that gives an
indication of the silicon surface temperature of the DCL. This
information can be used to measure
JC
and
JA
or flag an alarm
if proper cooling is lost. Output from the sensor is a current sink
VCOM
IOLC
IOXRTN
V/I
+1
VCOM_S
ACTIVE LOAD
PROT_LO
INHL
INHLB
IOHC
V/I
1.0 A/ K
DR_GND GND_ROT
PWRGND
9
HQGND THERMSTART
PROT_HI
THERM*
*ONLY
1 (ONE) THERM PER DEVICE
that is proportional to absolute temperature. 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 (I
OUT
) pin. A voltage drop across the resistor will
be developed that equals 10 k鈩?1
碌A/擄K
= 10 mV/擄K = 2.98 V
at room temperature.
REV. A
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 2003 Analog Devices, Inc. All rights reserved.
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