AD9914SLASHPCBZ datasheet(3/45 Pages) AD

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Data Sheet

AD9914

Rev. F | Page 3 of 45

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 input/output 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).

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 ( )

PHASE ( )

DIGITAL

RAMP

GENERATOR

MULTICHIP

SYNCHRONIZATION

SYSCLK

PLL

REF_CLK

AD9914

OUTPUT

SHIFT

KEYING

DATA

ROUTE

AND

PARTITION

CONTROL

INTERNAL CLOCK TIMING

AND CONTROL

Acos ( t + )

Asin ( t + )

DAC

12-BIT

DDS

INTERNAL

PROGRAMMING

REGISTERS

Figure 2. Detailed Block Diagram

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