AD9959

Data Sheet

Rev. C | Page 14 of 44

APPLICATION CIRCUITS

CH0

CH1

AD9959

REFCLK

CH3

CH2

PULSE

FILTER

FILTER

FILTER

FILTER

ANTENNA

RADIATING

ELEMENTS

FILTER

FILTER

FILTER

FILTER

LO

Figure 22. Phase Array Radar Using Precision Frequency/Phase Control from DDS in FMCW or Pulsed Radar Applications;

DDS Provides Either Continuous Wave or Frequency Sweep

CH0

CH1

AD9959

I BASEBAND

Q BASEBAND

RF OUTPUT

REFCLK

CH3

CH2

IMAGE

FREQUENCY

LO

LO ±90

DEGREES

ADL5390

AD8349

AD8348

AD8347

AD8346

Figure 23. Single-Sideband-Suppressed Carrier Upconversion

LOOP

FILTER

PHASE

COMPARATOR

VCO

LPF

AD9959

REFCLK

REFERENCE

CHARGE

PUMP

AD9510, AD9511, ADF4106

÷

÷

Figure 24. DDS in PLL Locking to Reference Offering Distribution with Fine Frequency and Delay Adjust Tuning