AD9915 Datasheet, PDF (1/48 Pages) Analog Devices – 2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC

Data Sheet
2.5 GSPS Direct Digital Synthesizer
with 12-Bit DAC
AD9915
FEATURES
2.5 GSPS internal clock speed
Integrated 12-bit DAC
Frequency tuning resolution to 135 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 978 MHz)
Wideband SFDR < −57 dBc
Serial or parallel I/O control
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
Multichip synchronization
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
AD9915
HIGH SPEED PARALLEL
MODULATION
PORT
LINEAR
SWEEP
BLOCK
2.5GSPS DDS CORE
12-BIT DAC
REF CLK
MULTIPLIER
TIMING AND CONTROL
SERIAL OR PARALLEL
DATA PORT
Figure 1.
Rev. A
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