GENERAL DESCRIPTION

The AD9858 is a direct digital synthesizer (DDS) featuring a 10-bit digital-to-analog converter (DAC) operating up to 1 GSPS. The AD9858 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 sine wave at up to 400 MHz.

FEATURES

1 GSPS internal clock speed

Up to 2 GHz input clock (selectable divide-by-2)

Integrated 10-bit DAC

Excellent phase noise and SFDR

32-bit programmable frequency register

Simplified 8-bit parallel and SPI serial control interface

Automatic frequency sweeping capability

4 frequency profiles

3.3 V power supply

Power dissipation: 2 W typical

Integrated programmable charge pump and phase frequency detector with fast lock circuit

Isolated charge pump supply up to 5 V

Integrated 2 GHz mixer

APPLICATIONS

VHF/UHF LO synthesis

Tuners

Instrumentation

Agile clock synthesis

Cellular base station hopping synthesizers

Radars

SONET/SDH clock synthesis

AD9858屬于集成電路（IC） > 直接數字合成（DDS）。亞德諾半導體技術有限公司制造生產的AD9858直接數字合成（DDS）直接數字合成 (DDS) 用于由數字信號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。