AD9914PCBZ datasheet(3/48 Pages) AD

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Data Sheet

AD9914

Rev. C | Page 3 of 48

GENERAL DESCRIPTION

The AD9914 is a direct digital synthesizer (DDS) featuring a

12-bit DAC. The AD9914 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 1.4 GHz. The AD9914

enables fast frequency hopping and fine tuning resolution

(64-bit capable using programmable modulus mode). The

AD9914 also offers fast phase and amplitude hopping capability.

The frequency tuning and control words are loaded into the

AD9914 via a serial or parallel I/O port. The AD9914 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 AD9914 is specified to operate over the extended industrial

temperature range (see the Absolute Maximum Ratings section).

Figure 2. Detailed Block Diagram

F0 TO F3

D0 TO D31

PS[2:0]

I/O_UPDATE

POWER-

DOWN

CONTROL

DAC_RSET

AOUT

OSK

DROVER

DRCTL

DRHOLD

SYNC_CLK

CLOCK

AMPLITUDE (A)

FREQUENCY

(ω)

PHASE (θ)

DIGITAL

RAMP

GENERATOR

MULTICHIP

SYNCHRONIZATION

SYSCLK

PLL

REF_CLK

AD9914

OUTPUT

SHIFT

KEYING

DATA

ROUTE

AND

PARTITION

CONTROL

INTERNAL CLOCK TIMING

AND CONTROL

Acos (ωt + θ)

Asin (ωt + θ)

DAC

12-BIT

DDS

INTERNAL

PROGRAMMING

REGISTERS

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