AD9915 AD [Analog Devices], AD9915 Datasheet - Page 3

• Manufacturer Part Number: AD9915
• Description: 2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC
• Manufacturer: AD [Analog Devices]

Data Sheet
GENERAL DESCRIPTION
The
12-bit DAC. The
coupled with an internal high speed, high performance DAC
to form a digitally programmable, complete high frequency
synthesizer capable of generating a frequency-agile analog
output sinusoidal waveform at up to 1.0 GHz. The
enables fast frequency hopping and fine tuning resolution
(64-bit capable using programmable modulus mode). The
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The frequency tuning and control words are loaded into the
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I/O_UPDATE
also offers fast phase and amplitude hopping capability.
via a serial or parallel I/O port. The
SYNC_CLK
D0 TO D31
DRHOLD
DROVER
F0 TO F3
PS[2:0]
DRCTL
is a direct digital synthesizer (DDS) featuring a
OSK
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32
2
4
3
uses advanced DDS technology,
PROGRAMMING
REGISTERS
INTERNAL
GENERATOR
OUTPUT
KEYING
DIGITAL
SHIFT
RAMP
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PARTITION
CONTROL
ROUTE
DATA
AND
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also
Figure 2. Detailed Block Diagram
AMPLITUDE (A)
PHASE (θ)
FREQUENCY (ω)
Rev. A | Page 3 of 48
INTERNAL CLOCK TIMING
AND CONTROL
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CONTROL
POWER-
DOWN
CLOCK
ω
A
θ
DDS
supports a user defined linear sweep mode of operation for
generating linear swept waveforms of frequency, phase, or
amplitude. A high speed, 32-bit parallel data input port is
included, enabling high data rates for polar modulation
schemes and fast reprogramming of the phase, frequency, and
amplitude tuning words.
The
temperature range (see the Absolute Maximum Ratings
section).
Asin (ωt + θ)
Acos (ωt + θ)
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SYNCHRONIZATION
MULTICHIP
SYSCLK
is specified to operate over the extended industrial
PLL
12-BIT
DAC
DAC_RSET
AOUT
AOUT
REF_CLK
REF_CLK
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