GENERAL DESCRIPTION

The AD9741/AD9743/AD9745/AD9746/AD9747 are pin compatible, high dynamic range, dual digital-to-analog converters (DACs) with 8-/10-/12-/ 14-/16-bit resolutions and sample rates of up to 250 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.

FEATURES

High dynamic range, dual DACs

Low noise and intermodulation distortion

Single carrier WCDMA ACLR = 80 dBc @ 61.44 MHz IF

Innovative switching output stage permits useable outputs

   beyond Nyquist frequency

LVCMOS 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, Pb-free, 72-Lead LFCSP

APPLICATIONS

Wireless infrastructure:  WCDMA, CDMA2000, TD-SCDMA, WiMAX

Wideband communications: LMDS/MMDS, point-to-point

Instrumentation: RF signal generators, arbitrary waveform generators