12-Bit Data Converter Claimed As IndustryÕs Fastest For IF Sampling

Claimed to be the industryÕs fastest 12-bit A/D converter, the AD9433 has a sampling rate of 125 MSPS, enabling intermediate frequency (IF) sampling at speeds as high as 350 MHz. In additon, an on-chip track-and-hold circuit is optimized for maximum dynamic performance in wideband and high IF carrier applications, such as GSM cellular base stations. The device requires only a 5V supply and a differential encode clockÑno external reference or drive components are required for many applications. And a user-selectable on-chip proprietary circuit optimizes spurious-free dynamic range (SFDR) versus signal-to-noise-and-distortion (SINAD) ratio performance for different input signal frequencies, providing as much as 85 dBc SFDR performance over the dc to 125-MHz band, the company says. The encode clock supports either differential or single-ended input and is PECL compatible. The output format is user selectable for binary or twoÕs complement and provides an over range (OR) signal. Packaged in a 52-lead PowerQuad 4 surface-mount package, the AD9433 is priced at $59.95 each/1,000 (105 MSPS) and $64.60 (125 MSPS). ANALOG DEVICES INC., Wilmington, MA. (800) 262-5643.