REV. A

a

AD53522

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High Speed

Dual Pin Electronic

FUNCTIONAL BLOCK DIAGRAM (One-Half)

DRIVER

COMPARATOR

V/I

V/I

ACTIVE LOAD

1.0 A/ K

AD53522

VHDCPL

OUT

VLDCPL

PWRGND

9

HQGND

VCOM_S

THERM*

+1

VH

VTERM

DATA

IOD

RLD

VL

HCOMP

VCCO

QH

QL

LCOMP

VCOM

IOLC

IOXRTN

INHL

IOHC

VCL

VCH

PROT_HI

PROT_LO

PWRD

GND_ROT

DR_GND

THERMSTART

*ONLY 1 (ONE) THERM PER DEVICE

INHLB

QLB

QHB

RLDB

IODB

DATAB

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

PRODUCT DESCRIPTION

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 –0.5 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.

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

if proper cooling is lost. Output from the sensor is a current sink

that is proportional to absolute temperature. 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

be developed that equals 10 k

Ω 1 µA/°K = 10 mV/°K=2.98V

at room temperature.