Data Sheet

AD9915

2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC

Rev. G

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FEATURES

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2.5 GSPS internal clock speed

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Integrated 12-bit DAC

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Frequency tuning resolution to 135 pHz

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16-bit phase tuning resolution

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12-bit amplitude scaling

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Programmable modulus

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Automatic linear and nonlinear frequency sweeping capability

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32-bit parallel datapath interface

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8 frequency/phase offset profiles

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Phase noise: −128 dBc/Hz (1 kHz offset at 978 MHz)

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Wideband SFDR < −57 dBc

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Serial or parallel input/output control

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1.8 V/3.3 V power supplies

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Software and hardware controlled power-down

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88-lead LFCSP package

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PLL REF CLK multiplier

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Phase modulation capability

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Amplitude modulation capability

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Multichip synchronization

APPLICATIONS

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Agile LO frequency synthesis

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Programmable clock generator

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FM chirp source for radar and scanning systems

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Test and measurement equipment

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Acousto-optic device drivers

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Polar modulator

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Fast frequency hopping

FUNCTIONAL BLOCK DIAGRAM

Figure 1.