NORWOOD, MASS. Analog Devices Inc. has a 12-bit, 65 Msample/second analog-to-digital converter for direct IF-sampling architectures in next-generation cellular basestation and software radio applications.
Jon Hall, marketing manager for the High-Speed Converter Group, said the need for smaller, less expensive and more efficient basestation technology creates demand for A/D converters with higher dynamic range and wider input bandwidths.
Hall said the direct IF under-sampling capability in the new A/D, designated the AD9226, simplifies the design and lowers the costs of next-generation wired and wireless communications, basestations, wireless local loops, radar and high-speed instrumentation, in which demodulation and signal tuning/filter functions are accomplished in the digital domain.
The AD9226 lets IF transceivers be reprogrammed to accommodate multiple modulation formats, reducing hardware requirements. Hall said the approach requires direct digitization at the higher intermediate frequency, where the AD9226's "IF-ready" input architecture can digitize a 70-MHz IF signal with 86.4 decibels of spurious-free dynamic range performance.
The A/D can digitize wideband signals with effective number of bits (ENOB) performance greater than 11 bits. It dissipates 475 milliwatts of power from a +5-V single supply and features 750-MHz full-power input bandwidth, pin-compatibility with AD922X products and an on-chip sample/hold amplifier, clock duty-cycle stabilizer and out-of-range indicator.
The AD9226 is specified for operation over the industrial temperature range of -40 degrees C to 85 degrees C. It's available in 28-lead shrink small-outline or 48-lead low-profile quad flat packs and is priced at $18.55 in 1,000-piece quantities.
CALL (800) 262-5643
EETInfo No. 612