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Maxim ADCs have dynamic operation at high frequencies

Posted: 13 Aug 2004 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? analog-to-digital data converter? adc? max1213? max1122?

A family of pin-compatible 12-, 10- and 8bit analog-to-digital data converters (ADCs) was introduced by Maxim Integrated Products that is touted to offer exceptional dynamic performance at high input frequencies.

The 8bit and 10bit ADCs are available in speed grades up to 250Msps, while the 12bit ADC is initially available at a speed of 170Msps. This family of high-performance ADCs includes the MAX1213 (12bit, 170Msps), MAX1122 (10bit, 170Msps), MAX1123 (10bit, 210Msps), MAX1124 (10bit, 250Msps) and MAX1121 (8bit, 250Msps). According to Maxim, the devices provide unmatched dynamic performance, including SNR, spurious-free dynamic range (SFDR) and intermodulation distortion (IMD). They also consume one of the lowest power in the industry.

The 12bit MAX1213 offers an SNR of 65.5dB that remains flat (within 1.5dB) up to 250MHz input frequency. It also has a noise power ratio (NPR) of 62dB and consumes 30 percent less power.

At the 10bit level, the MAX1123 delivers an SNR of 57.5dB that remains flat (within 1.5dB) up to 500MHz input frequency. The company said that this dynamic performance is even more remarkable given the low power consumption of <500mW at sample rates up to 250Msps.

At the 8bit level, the MAX1121 delivers an SNR of 48.8dB, said to be 2.8dB better than the competition, an SFDR of 68dBc, and a differential nonlinearity of 0.1LSB.

Designed for use in cable and cellular infrastructures, broadband-communication systems, instrumentation and high-performance video equipment, the new ADCs are available in a 68-pin QFN-EP package, specified for the extended temperature range. Prices start at $23.85 (1,000-up, FOB USA). An evaluation kit is available to help speed designs.

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