AD9915 2.5 GSPS Direct Digital Synthesizer with 12-bit DAC

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

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.

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

Features and Benefits

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 input/output control

1.8 V/3.3 V power supplies

See data sheet for additional features

RF & Microwave

Direct Digital Synthesis

IBIS Models

AD9915 IBIS Model .IBS

Data Sheets

Document	note
AD9915: 2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC Data Sheet (Rev. F)	PDF 1.2 M

Application Notes

Document	note
AN-1254: Synchronizing Multiple AD9915 DDS-Based Synthesizers (Rev. 0)	PDF 160 kB
AN-953: Direct Digital Synthesis (DDS) with a Programmable Modulus (Rev. B)	PDF 112 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD80315BCPZ-REEL7 Production	88 ld LFCSP (12x12mm w/6.7mm pad)	REEL 400	0C	0	0	Y
AD9915BCPZ Production	88 ld LFCSP (12x12mm w/6.7mm pad)	OTH 168	-40 to 85C	127.5	108.38	Y
AD9915BCPZ-REEL7 Production	88 ld LFCSP (12x12mm w/6.7mm pad)	REEL 400	-40 to 85C	127.5	108.38	Y