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Data Sheet

AD9915

GENERAL DESCRIPTION

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Rev. G | 4 of 51

The AD9915 is a direct digital synthesizer (DDS) featuring a 12‑bit

DAC. The AD9915 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 1.0 GHz. The AD9915 enables fast frequency hopping

and fine tuning resolution (64‑bit capable using programmable

modulus mode). The AD9915 also offers fast phase and amplitude

hopping capability. The frequency tuning and control words are

loaded into the AD9915 via a serial or parallel input/output port.

The AD9915 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 AD9915 is specified to operate over the extended industrial

temperature range (see the Absolute Maximum Ratings section).

Figure 2. Detailed Block Diagram

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