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AD9915 Folha de dados(PDF) 3 Page - Analog Devices

Nome de Peças AD9915
Descrição Electrónicos  2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

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Data Sheet
AD9915
Rev. A | Page 3 of 48
GENERAL DESCRIPTION
The AD9915 is a direct digital synthesizer (DDS) featuring a
12-bit DAC. The AD9915 uses advanced DDS technology,
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 AD9915
enables fast frequency hopping and fine tuning resolution
(64-bit capable using programmable modulus mode). The
AD9915 also offers fast phase and amplitude hopping capability.
The frequency tuning and control words are loaded into the
AD9915 via a serial or parallel I/O port. The AD9915 also
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 AD9915 is specified to operate over the extended industrial
temperature range (see the Absolute Maximum Ratings
section).
Figure 2. Detailed Block Diagram
32
F0 TO F3
D0 TO D31
PS[2:0]
I/O_UPDATE
POWER-
DOWN
CONTROL
DAC_RSET
AOUT
AOUT
OSK
DROVER
DRCTL
DRHOLD
SYNC_CLK
A
θ
CLOCK
AMPLITUDE (A)
FREQUENCY
(ω)
PHASE (θ)
DIGITAL
RAMP
GENERATOR
2
4
MULTICHIP
SYNCHRONIZATION
SYSCLK
PLL
REF_CLK
REF_CLK
AD9915
OUTPUT
SHIFT
KEYING
DATA
ROUTE
AND
PARTITION
CONTROL
3
INTERNAL CLOCK TIMING
AND CONTROL
ω
Acos (ωt + θ)
Asin (ωt + θ)
DAC
12-BIT
DDS
INTERNAL
PROGRAMMING
REGISTERS


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