GENERAL DESCRIPTION

The AD9780/AD9781/AD9783 include pin-compatible, high dynamic range, dual digital-to-analog converters (DACs) with 12-/14-/16-bit resolutions, and sample rates of up to 500 MSPS. The devices include specific features for direct conversion transmit applications, including gain and offset compensation, and they interface seamlessly with analog quadrature modulators such as the ADL5370.

A proprietary, dynamic output architecture permits synthesis of analog outputs even above Nyquist by shifting energy away from the fundamental and into the image frequency. Full programmability is provided through a serial peripheral interface (SPI) port. Some pin-programmable features are also offered for those applications without a controller.

FEATURES

High dynamic range, dual DAC parts

Low noise and intermodulation distortion

Single carrier W-CDMA ACLR = 80 dBc @ 61.44 MHz IF

Innovative switching output stage permits usable outputs beyond Nyquist frequency

LVDS inputs with dual-port or optional interleaved single port operation

Differential analog current outputs are programmable from 8.6 mA to 31.7 mA full scale

Auxiliary 10-bit current DACs with source/sink capability for external offset nulling

Internal 1.2 V precision reference voltage source

Operates from 1.8 V and 3.3 V supplies

315 mW power dissipation

Small footprint, RoHS compliant, 72-lead LFCSP

APPLICATIONS

Wireless infrastructure

W-CDMA, CDMA2000, TD-SCDMA, WiMAX

Wideband communications

LMDS/MMDS, point-to-point

RF signal generators, arbitrary waveform generators

AD9783BCPZRL属于集成电路（IC） > 数模转换器（DAC）。亚德诺半导体技术有限公司制造生产的AD9783BCPZRL数模转换器（DAC）数模转换器（DAC、D/A、D2A 或 D 转 A）可将数字信号转换为缓冲或无缓冲的模拟电压或电流。DAC 架构是否适合特定应用，要取决于分辨率和采样频率。DAC 通常用于音乐播放器，将数字数据流转换为模拟音频流。它们还用于电视和手机，将数字视频数据转换为模拟视频信号，再连接到屏幕驱动器，以显示单色或彩色图像。