AD99140 pages

3.5 GSPS Direct Digital Synthesizer
with 12-Bit DAC
AD9914

Data Sheet
FEATURES

1.8 V/3.3 V power supplies
Software and hardware controlled power-down
88-lead LFCSP package
PLL REF CLK multiplier
Phase modulation capability
Amplitude modulation capability

3.5 GSPS internal clock speed
Integrated 12-bit DAC
Frequency tuning resolution to 190 pHz
16-bit phase tuning resolution
12-bit amplitude scaling
Programmable modulus
Automatic linear and nonlinear frequency sweeping
capability
32-bit parallel datapath interface
8 frequency/phase offset profiles
Phase noise: −128 dBc/Hz (1 kHz offset at 1396 MHz)
Wideband SFDR < −50 dBc
Serial or parallel I/O control

APPLICATIONS
Agile LO frequency synthesis
Programmable clock generator
FM chirp source for radar and scanning systems
Test and measurement equipment
Acousto-optic device drivers
Polar modulator
Fast frequency hopping

FUNCTIONAL BLOCK DIAGRAM
AD9914

HIGH SPEED PARALLEL
MODULATION
PORT

3.5GSPS DDS CORE

REF CLK
MULTIPLIER

TIMING AND CONTROL

SERIAL OR PARALLEL
DATA PORT

12-BIT DAC

10836-001

LINEAR
SWEEP
BLOCK

Figure 1.

Rev. D

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