AD9501_15 Datasheet, PDF (1/12 Pages) Analog Devices – Digitally Programmable Delay Generator

a
Digitally Programmable
Delay Generator
AD9501
FEATURES
Single 5 V Supply
FUNCTIONAL BLOCK DIAGRAM
TTL- and CMOS-Compatible
10 ps Delay Resolution
OFFSET
ADJUST ^RSET ^CEXT
2.5 ns to 10 ␮s Full-Scale Range
Maximum Trigger Rate 50 MHz
APPLICATIONS
RESET
TRIGGER
TRIGGER
CIRCUIT
RAMP
GENERATOR
AD9501
–
OBSOLETE Disk Drive Deskewing
Data Communications
Test Equipment
Radar I and Q Matching
D/A CONVERTER
+
LATCH
TTL LATCHES
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
DAC GND GND +V_S +V_S
(MSB)
(LSB) OUTPUT
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
equal to the selected time delay (t_D) plus an inherent propaga-
tion delay (t_PD).
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
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