NORWOOD, Mass. (PRWEB) June 11, 2008
The ADA4939 can be used in either differential-to-differential or single-ended-to-differential configurations. An internal common-mode feedback loop allows the user to independently adjust the ADA4939 output common-mode level to match the input common mode voltage of the ADC, and at the same time achieve exceptional output balance and suppression of even-order harmonics.
The ADA4939 is especially well suited to communications applications, such as cellular base stations using low IF (intermediate frequency) and baseband signal processing at frequencies up to 100 MHz, and where 14- and 16-bit accuracy is required. The two-channel version, the ADA4939-2, is ideal for driving dual ADCs used in I/Q demodulation schemes. It offers low cross-talk of 80 dB at 100 MHz while providing gain and phase matching.
The ADA4939 is fabricated using ADI’s proprietary silicon-germanium (SiGe) complementary bipolar process, enabling it to achieve very low levels of distortion with an input voltage noise of 2.3 nV/rt Hz, as well as 3 dB bandwidth of 1.4 GHz (G=+2) and a slew rate of 5000 V/
