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ADC suits wireless base station transceivers

Posted: 21 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Linear Tech? LTC2285? ADC?

Linear Technology's LTC2285, a 14bit 125MSps dual high-speed ADC with a low power dissipation of 395mW per channel, is optimized for use in multicarrier wireless base station transceiver applications, including WiBro and WiMAX. These ADCs tout 71.3dB SNR and 78dB SFDR at 140MHz. Its sampling rate capabilities double the capacity of existing systems, which typically sample at 65MSps.

The chip includes integrated bypass capacitance and 50-ohm series output matching for a small total solution size. The dual ADC also offers a data-ready clock-out pin for latching the output data buses. The ADC is optimized for undersampling signals up to 140MHz, and has a analog input bandwidth of 640MHz. It's suitable for use with the LT5516 direct conversion quadrature demodulator and the LT6402 300MHz low distortion/low noise ADC driver in downconversion signal chains.

In addition to the 14bit LTC2285, the company offers the pin-compatible 12bit LTC2283 and 10bit LTC2281 125MSps dual ADCs. These three dual-ADCs complete a 3V family of 10-, 12- and 14bit parts ranging from 10MSps to 125MSps. The pin compatibility offers designers more flexibility during product development, providing a fast and cost-effective upgrade path for existing designs.

All three devices are supported with demo boards for quick evaluation and can be purchased online. Samples of the LTC2285, LTC2283 and LTC2281 are already available with production quantities scheduled for September for both commercial and industrial temperature grades. The ADCs and are each priced at $73.50, $41.25, and $18, respectively, in 1,000-piece quantities.

- Vince Biancomano

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Related Datasheets
Part Number Description Category
? LTC2285 Dual 14-Bit, 125Msps Low Power 3V ADC Cards and Modules



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