Date: 16/09/2012

14 and 16-bit DACs for single/multicarrier RF and IF synthesis

Analog Devices, Inc. (ADI) has introduced three high-performance 16- and 14-bit transmit D/A converters (DACs) with extended operating temperature ranges and high-reliability packaging for radar, secure communications, avionics, and other defense electronics applications. ADI’s 14-bit dual-channel AD9117, 16-bit dual-channel AD9122 and 14-bit single-channel AD9739 transmit DACs were designed for signal synthesis applications, including pulse-modulated waveform generation and for synthesizing the modulated carrier in quadrature digital architectures.

In addition to extended temperature ranges, some aerospace and defense applications require an alternate solution to matte tin (Sn) for lead-frame packages in order to eliminate the concern with the whiskering associated with the Sn plating process. These DACs are available in NiPdAu lead-frame or Pb BGA packaging, as applicable, to avoid the issue of whiskering. The NiPdAu lead-frame package is assembled with low halogen/halogen-free RoHS-compliant materials and the entire lead-frame is pre-plated.

AD9117 Dual-channel D/A Converter for Baseband Synthesis Features and Benefits:
SFDR to Nyquist:
86 dBc @ 1 MHz output
85 dBc @ 10 MHz output
NSD @ 10 MHz output, 125 MSPS, 20 mA: -157 dBc/Hz
Differential current outputs: 4 mA to 20 mA
-40° C to +85° C operating temperature range.
NiPdAu lead-frame packaging

AD9122EP Dual-channel D/A Converter for IF Synthesis Features and Benefits:
72 dBc SFDR performance with fDAC = 800 MSPS, fOUT = 70 MHz
Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 O to 50 O
Novel 2×/4×/8× interpolator/complex modulator allows carrier placement anywhere in the DAC bandwidth
-55 Degree Centigrade to +105 Degree Centigrade operating temperature range
NiPdAu lead-frame packaging

AD9739 Single-channel D/A Converter for RF Synthesis Features and Benefits:
Industry leading single/multicarrier IF or RF synthesis
60 dBc SFDR performance with fDAC = 2400 MSPS, fOUT = 950 MHz
-40° C to +85° C operating temperature range
Pb BGA packaging