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TI unveils 'fastest' 16bit successive-approximation ADC

Posted: 29 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Vince Biancomano? Texas Instruments? TI? ADS8422? ADC?

Texas Instruments ADS8422 sets claim to the fastest 16bit successive approximation register ADC in the industry33 percent faster than the nearest competitive device, according to the company. It's billed as a 4MSps device that sacrifices neither AC or DC performance, and thus is suited to medical imaging, test and measurement, industrial automation, and scientific instrumentation.

"The ADS8422 combines best-in-class speed with superior precision specifications, enabling customers to push the boundaries in their advanced applications," said Art George, senior vice president.

The ADS8422 offers 92dB signal-to-noise ratio, total harmonic distortion of -102dB, 2LSB integral nonlinearity, 1.5/-1LSB differential nonlinearity, 0.5mV offset voltage over temperature, less than 0.2ppm/C offset drift, 0.1 percent gain error, and 2ppm/C gain drift.

The device has a fully differential input with pseudo bipolar input range (-4-4V) and includes either a full 16bit interface or two 8bit option modes so data can be read in cycles. Other features include an internal 4.096V reference and reference buffer, single-supply operation, and guaranteed operation over the industrial temperature range of -40C to 85C.

The company provides customers with an advanced signal chain solution for high-speed, high-precision applications including an extensive portfolio of wideband amplifiers to drive the analog inputs of the ADS8422. These include the THS4031, THS4131, and the OPA2613. The ADS8422 includes a separate I/O supply to simplify the digital interface and will work with the company's TMS320 DSP platform.

The ADS8422 is sampling now, with volume production scheduled for 3Q. The device, available in a 48-pin TQFP package, sells for $31.95 in 1,000 pieces (suggested resale pricing). Evaluation modules are available.

- Vince Biancomano
eeProductCenter




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