AD53509

·250 MHz Operation
·Driver/Comparator and Active Load Included
·On-Chip Schottky Diode Bridge
·52-Lead LQFP Package with Built-In Heat Sink

Power Supply Voltage
VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . 13 V
VEE to GND . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . 8 V
VCC to VEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
VCCO to GND . . . . . . . . . . . . . . . . . . . .  . . .. . . . . . . . . . 10 V
PWR GND HQ GND . . . . . . . . . . . . . . . . . . .  . . . . . . . . ±0.4 V
Inputs
DATA, DATA, IOD, IOD, RLD, RLD . . . . . . . . .  . . . . +5 V, 2 V
DATA to DATA, IOD to IOD, RLD to RLD . . . . . .  .  . . . . . ±3 V
LEL, LEL, LEH, LEH . . . . . . . . . . . . . . .  . . . . . . . . +5 V, 2 V
LEL to LEL, LEH to LEH . . . . . . . . . . . . . .  . . . .. . . . . . . ±3 V
INHL, INHL . . . . . . . . . . . . . . . . . . . . . . . .  . .  . . . +5 V, 2 V
INHL to INHL . . . . . . . . . . . . . . . . . .  . . . . .. . . . . . . . . . ±3 V
VH, VL, VTERM, VCOM_I to GND . . . . .  . . . .  . . . . +8 V, 3 V
VH to VL . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . ±10 V
(VHVTERM) and (VTERM VL) . . . . . . . . . . . .  . . . . . ±10 V
IOHC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6 V
IOLC . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . ±6 V
HCOMP . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . +8 V, 3 V
LCOMP . . . . . . . . . . . . . . . . . . . . . . . .  . .. . . . . . . +8 V, 3 V
HCOMP, LCOMP to VOUT . . . . . . . . . . . . .  . . . . . . . . . ±10 V
Outputs
VOUT Short Circuit Duration . . . . . . . . . . . . . . . . . Indefinite2
VOUT Inhibit Mode . . . . . . . . . . . . . . . . . . .  .. . . . +8 V, 3 V
VHDCPL . . . . . . . . Do Not Connect Except for Cap to VCC
VLDCPL . . . . . . . . Do Not Connect Except for Cap to VEE
QH, QH, QL, QL Maximum IOUT
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . 50 mA
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA
THERM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 V, 0 V
IOHRTN, IOLRTN . . . . . . . . . . . . . . . .  . . . .  . . +8.5 V, 3.5 V
VCOM_S Short Circuit Duration . . . . . . . . . . . . . . . . . . 3 sec2
ORDERING GUIDE
Shipment Method
Package Quantity per Package
Model Description Shipping Container Option
AD53509JSQ 52-Lead LQFP-EDQUAD 90 SQ-52
Environmental
Operating Temperature (Junction) . . . . . . . . . . . . . . . 175°C
Storage Temperature . . . . . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec)3 . . . . . . . . . . . 260°C
NOTES
¹Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Absolute maximum limits apply individually, not in combination. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
²Output short circuit protection is guaranteed as long as proper heat sinking is employed to ensure compliance with the operating temperature limits.
³To ensure lead coplanarity (± 0.002 inches) and solderability, handling with bare hands should be avoided and the device should be stored in environments at 24 °C ± 5°C (75°F ± 10°F) with relative humidity not to exceed 65%.

The AD53509 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 AD53509 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 2 V to +7 V to accommodate a wide variety of test devices. The output leakage is typically less than 250 nA over the entire signal range.

The dual comparator AD53509, 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 signal lines terminated to 2 V. Signal tracking capability is upwards of 5 V/ns.

The active load of AD53509 can be set for up to 40 mA load current with less than a 10 A linearity error through the entire set range. IOH, IOL and the buffered VCOM are independently adjustable. On-board Schottky diodes provide high speed switching and low capacitance.

Also included on the chip is an on-board temperature sensor AD53509 whose purpose is to give an indication of the 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 that is proportional to absolute temperature. The gain is trimmed to a nominal value of 1.0 A/K. As an example, the output current can be sensed by using a 10 k resistor connected from 10 V to the THERM (IOUT) pin. A voltage drop across the resistor will be developed that equals: 10K * 1 A/K = 10 mV/K = 2.98 V at room temperature.