GENERAL DESCRIPTION

The AD9913 is a complete direct digital synthesizer (DDS) designed to meet the stringent power consumption limits of portable, handheld, and battery-powered equipment. The AD9913 features a 10-bit digital-to-analog converter (DAC) operating up to 250 MSPS. The AD9913 uses advanced DDS technology, coupled with an internal high speed, high performance DAC to form a complete, digitally-programmable, high frequency synthesizer capable of generating a frequency agile analog output sinusoidal waveform at up to 100 MHz.

FEATURES

50 mW at up to 250 MSPS internal clock speed

100 MHz analog output

Integrated 10-bit DAC

0.058 Hz or better frequency resolution

0.022° phase tuning resolution

Programmable modulus in frequency equation

Phase noise ≤ –135 dBc per Hz @ 1 kHz offset (DAC output)

(<115 dBc per Hz when using on-board PLL multiplier)

Excellent dynamic performance

>80 dB SFDR @ 100 MHz (±100 kHz offset) AOUT

Automatic linear frequency sweeping capability

8 frequency or phase offset profiles

1.8 V power supply

Software and hardware controlled power-down

Parallel and serial programming options

32-lead LFCSP package

Optional PLL REF_CLK multiplier

Internal oscillator (can be driven by a single crystal)

Phase modulation capability

APPLICATIONS

Portable and handheld equipment

Agile LO frequency synthesis

Programmable clock generator

FM chirp source for radar and scanning systems