GENERAL DESCRIPTION

The AD9859 is a direct digital synthesizer (DDS) featuring a 10-bit DAC operating at up to 400 MSPS. The AD9859 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 200 MHz. The AD9859 is designed to provide fast frequency hopping and fine tuning resolution (32-bit frequency tuning word). The frequency tuning and control words are loaded into the AD9859 via a serial I/O port.

FEATURES

400 MSPS internal clock speed

Integrated 10-bit DAC

32-bit tuning word

Phase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)

Excellent dynamic performance

>75 dB SFDR @ 160 MHz (±100 kHz offset) AOUT

Serial I/O control

1.8 V power supply

Software and hardware controlled power-down

48-lead TQFP/EP package

Support for 5 V input levels on most digital inputs

PLL REFCLK multiplier (4× to 20×)

Internal oscillator; can be driven by a single crystal

Phase modulation capability

Multichip synchronization

APPLICATIONS

Agile LO frequency synthesis

Programmable clock generators

Test and measurement equipment

Commercial and amateur radio exciter

AD9859屬于集成電路（IC） > 直接數(shù)字合成（DDS）。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD9859直接數(shù)字合成（DDS）直接數(shù)字合成 (DDS) 用于由數(shù)字信號(hào)生成不同頻率的模擬波形。在必須大范圍掃描的無線系統(tǒng)中可用于頻率控制。主時(shí)鐘頻率有 5MHz、16MHz、16.776MHz、25MHz、50MHz、75MHz、125MHz、180MHz、200MHz、250MHz、300MHz、400MHz、500MHz、1GHz、2.5GHz 和 3GHz，分辨率為 10 b、12 b 或 14 b。