National samples 10-bit, 1 GSPS signal path solution

Santa Clara, Calif.—National Semiconductor Corp. has added a 2.5 GHz fully differential amplifier and a 10-bit, 2 Giga-sample per second (GSPS) single/1 GSPS dual A/D converter to its PowerWise family of energy-efficient products.

At a frequency of 248 MHz, the ADC10D1000 provides what National says is the industry's highest spurious-free dynamic range (SFDR) performance of 66 decibels relative to carrier (dBc) and 9.1 effective number of bits (ENOB). Running off a single supply voltage, the ADC10D1000 achieves this performance while consuming 33 percent less total power (2.8W) than comparable A/D converters, according to National.

The 2.5 GHz LMH6554 wideband, fully differential amplifier drives the 10-bit ADC10D1000, providing 0.1 dB gain flatness up to 800 MHz, SFDR of 72 dBc at 250 MHz and low-input voltage noise performance of 0.9 nV/sqrt Hz.

The ADC10D1000 yields 2.52 picojoules (pJ) per conversion, while the LMH6554 consumes 21 µA per MHz.

Applications include ground-based radar, data acquisition systems, point-to-point base stations and next-generation set-top boxes.

National is also sampling a space-qualified version of the ADC10D1000 that is supplied in a hermetic 376 column, thermally enhanced, ceramic column grid array (CCGA) package. The space-level version meets radiation levels of 120 MeV for single event latch-up and a total ionizing dose of 300 Krads (Si), making it well-suited for wideband satellite communications.

Pricing: For more information on the ADC10D1000's pricing, samples and reference boards, click here. The LMH6554 is priced at $4.50 in 1,000-unit quantities.

Availability: Production quantities scheduled for first quarter 2009.

Datasheet: LMH6554.

National Semiconductor,

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