INDUSTRY’S FIRST DUAL DIFFERENTIAL ADC DRIVERS COMPLEMENT BEST PERFORMING HIGH-SPEED ADCS

-ADA4937-2 and ADA4938-2 dual differential ADC drivers reduce design complexity, cost and board space in industrial and communications applications.
ADA4937-2

Norwood, MA (09/26/2007) -

About the ADA4937-2 and the ADA4938-2
Analog Devices’ ADA4937-2 and ADA4938-2 are the industry's first dual differential analog-to-digital converter (ADC) drivers. The new differential drivers enable designers of data acquisition systems in industrial and communications applications to improve system performance by enhancing key ADC performance characteristics, including SFDR (spurious-free dynamic range) and SNR (signal-to-noise ratio). With the industry’s first two-channel configuration, the ADA4937-2 and ADA4938-2 drivers reduce component count, bill of material cost and design complexity while driving high-performance ADCs operating from dc to 100 MHz.

The ADI ADA4937-2 and ADA4938-2 differential drivers combine the low noise and distortion levels required to drive the high-speed ADCs found in today’s wireless infrastructure and instrumentation equipment. Ideal for single 3-V to 5-V power supplies, the ADA4937-2 achieves an industry-best distortion of –120/–102 dBc at 10 MHz, –98/–100 dBc at 40 MHz and –84/–90 dBc at 70 MHz. The ADA4938-2 works over a 5-V to 10-V supply range and achieves industry-leading distortion of –112/–108 dBc at 10 MHz, –96/–93 dBc at 30 MHz and –79/–81 dBc at 50 MHz in dual supply applications.

Featuring an internal common-mode feedback architecture, the ADA4937-2 and ADA4938-2 allow the output common-mode voltage to be controlled by an externally applied voltage. This function bridges any gap between the output range of the component before the ADC and the input range of the ADC, eliminating the need for ac coupling, and making the drivers well suited for dc-coupled applications, such as data-acquisition instruments and baseband communications systems.

Both the ADA4937-2 and the ADA4938-2 are fabricated using ADI’s proprietary silicon-germanium (SiGe) complementary bipolar process, enabling very low levels of distortion with an input voltage noise of only 2.2 nV/rt-Hz. The low dc offset and excellent dynamic performance of the ADA4937-2 make it well suited for a variety of data acquisition and signal processing applications.

The ADA4937-2 and the ADA4938-2 are ideally suited for use with Analog Devices’ AD9640/AD9627/AD9600 family, AD6655/53 family, and AD9248/38/16 family. For more information, visit http://www.analog.com/pr/ADA4937-2 or http://www.analog.com/pr/ADA4938-2.

Availability and Pricing
The ADA4937-2 and ADA4938-2 dual differential ADC drivers are sampling now with full production scheduled for October 2007. The devices are priced at $5.69 per unit in 1,000-piece quantities in a Pb-free 4 mm × 4 mm 24-lead LFCSP (lead-frame chip-scale package) and are specified to operate over the −40 degrees C to +105 degrees C temperature range for 3.3-V supplies and the −40 degrees C to +85 degrees C temperature range for 5-V supplies.


About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest 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, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker “ADI” and is included in the S&P 500 Index.

Editor's Contact Information:

Jennifer Viera
781/937-1363

jennifer.viera@analog.com

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