REV. B

a

AD9501

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Digitally Programmable

Delay Generator

FEATURES

Single 5 V Supply

TTL- and CMOS-Compatible

10 ps Delay Resolution

2.5 ns to 10

s Full-Scale Range

Maximum Trigger Rate 50 MHz

APPLICATIONS

Disk Drive Deskewing

Data Communications

Test Equipment

Radar I and Q Matching

GENERAL DESCRIPTION

The AD9501 is a digitally programmable delay generator that

provides programmed time delays of an input pulse. Operating

from a single 5 V supply, the AD9501 is TTL- or CMOS-

compatible and capable of providing accurate timing adjust-

ments with resolutions as low as 10 ps. Its accuracy and

programmability make it ideal for use in data deskewing and

pulse delay applications, as well as clock timing adjustments.

Full-scale delay range is set by the combination of an external

resistor and capacitor and can range from 2.5 ns to 10

ms for a

single AD9501. An 8-bit digital word selects a time delay within

the full-scale range. When triggered by the rising edge of an input

pulse, the output of the AD9501 will be delayed by an amount

The AD9501 is available for a commercial temperature range

of 0

∞C to 70∞C in a 20-lead plastic DIP and a 20-lead plastic

leaded chip carrier (PLCC).

FUNCTIONAL BLOCK DIAGRAM

OFFSET

AD9501

TRIGGER

CIRCUIT

RAMP

GENERATOR

GND

GND

DAC

OUTPUT

LATCH

TRIGGER

RESET

D/A CONVERTER

TTL LATCHES

–

+

(MSB)

(LSB)

OBSOLETE