GENERAL DESCRIPTION

The AD9739 is a 14-bit, 2.5 GSPS high performance RF digital-to-analog converter (DAC) capable of synthesizing wideband signals from dc up to 3.0 GHz. Its DAC core features a quad switch architecture that provides exceptionally low distortion performance with an industry-leading direct RF synthesis capability. This feature enables multicarrier generation up to the Nyquist frequency in baseband mode as well as second and third Nyquist zones in mix mode. The output current can be programmed over the 8.66 mA to 31.66 mA range.

FEATURES

Direct RF synthesis at 2.5 GSPS update rate

DC to 1.25 GHz in baseband mode

1.25 GHz to 3.0 GHz in mix mode

Industry leading single/multicarrier IF or RF synthesis

fOUT = 350 MHz, ACLR =80 dBc

fOUT = 950 MHz, ACLR = 78 dBc

fOUT = 2100 MHz, ACLR = 69 dBc

Dual-port LVDS data interface

Up to 1.25 GSPS operation

Source synchronous DDR clocking

Pin-compatible with the AD9739A

Multichip synchronization capability

Programmable output current: 8.7 mA to 31.7 mA

Low power: 1.16 W at 2.5 GSPS

APPLICATIONS

Broadband communications systems

Military jammers

Instrumentation, automatic test equipment

Radar, avionics