a
Digitally Programmable
Delay Generator
AD9501
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
FUNCTIONAL BLOCK DIAGRAM
OFFSET
ADJUST RSET CEXT
RESET
TRIGGER
APPLICATIONS
Disk Drive Deskewing
Data Communications
Test Equipment
Radar I and Q Matching
OBS
GENERAL DESCRIPTION
AD9501
RAMP
GENERATOR
TRIGGER
CIRCUIT
D/A CONVERTER
LATCH
+
TTL LATCHES
OLE
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 CMOScompatible and capable of providing accurate timing adjustments 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
equal to the selected time delay (tD) plus an inherent propagation delay (tPD).
–
D7 D6 D5 D4 D3 D2 D1 D0
(MSB)
(LSB)
DAC
GND GND +VS +VS
OUTPUT
TE
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).
REV. B
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.
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Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2004 Analog Devices, Inc. All rights reserved.
