Differential ADC drivers deliver low distortion levels

Norwood, Mass.—Analog Devices Inc. extended its family differential amplifiers with a pair of devices that it claims delivers 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 ADA4937-1 and ADA4938-1 differential drivers allow the ADCs to provide more accurate data collection at faster speeds, resulting in higher system throughout and overall performance.

Suitable for single 3-V to 5-V power supplies, the ADA4937-1 achieves a 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 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.

Pricing: $3.79 per unit in 1,000-piece quantities in a 3 mm x 3 mm LFCSP (lead frame chip scale package).
Availability: Sampling now with full production scheduled for the second quarter of 2007.
Data Sheet:

Analog Devices Inc., 1-800-262-5643,

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