New Industry Products

Analog Devices Intros AD7621 SAR Converter

November 16, 2003 by Jeff Shepard

Analog Devices Inc. (ADI, Wilmington, MA) introduced a 16-bit successive-approximation (SAR) analog-to-digital converter (ADC) that claims to provide 50% higher speed and more than three times the accuracy of competing products, all in packaging that is 40% smaller. A general-purpose ADC, the AD7621 is suitable for high-end data acquisition, CT scanners, spectrum analyzers, automatic test equipment and general-purpose test equipment.

The new AD7621 operates at 3 mega samples per second (MSPS), while providing ±1 least significant bit integral non-linearity, ±1 least significant bit differential non-linearity, and no missing codes. The AD7621 consumes <100mW at 3 MSPS, and is available in a 48-lead, 7mm x 7mm low-profile quad flat pack, and a lead-frame chip-scale package. The AD7621 features low-power consumption, with typical power dissipation of 100mW. Operating with a single 5V supply, it can be interfaced to either 5V or 3V digital logic. The AD7621 offers no missing codes to 16 bits, 90dB signal-to-noise ratio, and pin-for-pin compatibility with the AD7674 18-bit, 800kSPS SAR ADC. The AD7621 features include an internal conversion clock, an internal reference buffer, error-correction circuits, and both serial and parallel interface ports.

The AD7621 is sampling now and will be in full production in June 2004. The device is priced at $29.95 per unit in 1,000-piece quantities.