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/µS. The ADA4939 is specified to operate over the −40 degrees C to +105 degrees C temperature range for both 3.3-V and 5-V operation.
Availability and Pricing
The ADA4939-1 and ADA4939-2 are available now in production quantities. The ADA4939-1 is housed in a Pb-free, 3 mm × 3 mm 16-lead LFCSP (lead-frame chip-scale package), and the two-channel ADA4939-2 comes in a 4 mm × 4 mm 24-lead LFCSP. The ADA4939-1 is priced at $3.79 per unit in 1,000-unit quantities, and the ADA4939-2 is priced at $5.69 per unit in 1,000-unit quantities. For more information, visit http://www.analog.com/pr/ADA4939. For more information on driving ADCs, visit http://www.analog.com/adcdrivers.
About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the most long-standing, high-growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers around the world, representing virtually all types of electronics equipment. Celebrating more than 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices, Inc. is headquartered in Norwood, Massachusetts, and employs approximately 8,900 people worldwide. It has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, and the Philippines. Analog Devices' common stock is listed on the New York Stock Exchange and ADI is included in the S&P 500 Index. http://www.analog.com
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