AD9915BCPZ(RevA) データシートの表示（PDF） - Analog Devices

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AD9915BCPZ
(Rev.:RevA)

2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC

Analog Devices 

Data Sheet

AD9915

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).

AD9915

OSK

DRCTL 2

DRHOLD

DROVER

OUTPUT

SHIFT

KEYING

DIGITAL

RAMP

GENERATOR

PS[2:0]

I/O_UPDATE

3

INTERNAL

PROGRAMMING

REGISTERS

32

D0 TO D31

4

F0 TO F3

SYNC_CLK

DDS

AMPLITUDE (A)

A

PHASE (θ)

DATA

θ

ROUTE FREQUENCY (ω)

AND

ω

PARTITION

CONTROL

CLOCK

Acos (ωt + θ)

Asin (ωt + θ)

SYSCLK

INTERNAL CLOCK TIMING

AND CONTROL

PLL

POWER-

DOWN

CONTROL

MULTICHIP

SYNCHRONIZATION

DAC

12-BIT

DAC_RSET

AOUT

AOUT

REF_CLK

REF_CLK

Figure 2. Detailed Block Diagram

Rev. A | Page 3 of 48

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