ANALOG DEVICES INTRODUCES THE INDUSTRY’S LOWEST DISTORTION DIFFERENTIAL ADC DRIVERS

ADA493x family enables the maximum ADC performance from dc to 100MHz.
ADA493x

Norwood, MA (02/08/2007) - Analog Devices, Inc. (NYSE: ADI) today extended its family of innovative differential amplifiers—which have become the industry standard for driving analog-to-digital converters (ADCs)—by introducing two new devices with distortion levels 10 dB lower than competing driver ICs. The ADA4937-1 and ADA4938-1 differential drivers are optimized for driving the highest performance ADCs from dc to 100 MHz. For example, the ADA4937-1 has 16-bit performance up to 40 MHz, 14-bit performance up to 70 MHz and 12-bit performance up to 100 MHz. In applications such as wireless infrastructure equipment, the improved ADC performance translates into higher data rates with fewer errors. When used in data-acquisition systems, the new driver ICs allow the ADCs to provide more accurate data collection at faster speeds, resulting in higher system throughout and overall performance.

“Lower distortion levels allow designers to maintain the quality of key ADC performance characteristics, including spurious-free dynamic range and signal-to-noise ratio, leading directly to improved system performance,” said Jim Doscher, product line director, High-Speed Linear Products, Analog Devices, Inc. “The drivers also make it very easy to level shift the signal to match the input range of the ADC without ac coupling, preventing the loss of low-frequency information.”

About the ADA4937 and ADA4938 ADC Drivers
The ADA4937-1 and ADA4938-1 ADC 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 ADA4937-1 achieves an industry-best distortion of –120/–102 dBc at 10 MHz, –98/–100 dBc at 40 MHz and –84/–90 dBc at70 MHz. The ADA4938-1 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. The ultra-low distortion of the ADA4937-1 and ADA4938-1 is achieved through the use of ADI’s XFCB-3, a proprietary and specialized silicon germanium (SiGe) silicon-on-insulator (SOI) process technology.

The devices also feature an internal common-mode feedback architecture, which allows the output common-mode voltage to be controlled by an externally applied voltage. This 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.

Availability and Pricing
The ADA4937-1 and ADA4938-1 are sampling now with full production scheduled for April, 2007 and June, 2007, respectively. The devices are priced at $3.79 per unit in 1,000-piece quantities in a 3 mm × 3 mm LFCSP (lead frame chip scale package) and are specified over an operating temperature range of 0 degrees C to + 85 degrees C.

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 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:

Sue Martenson
781-937-1989
781-937-1078
sue.martenson@analog.com

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