Linear Technology’s LTC2285 is a 14-bit 125 Msps dual high-speed ADC with power dissipation of 395 mW per channel. This high-speed device is optimized for use in power-efficient, multcarrier wireless base station transceiver applications including WiBro and WiMAX standards with performance of 71.3 dB SNR and 78 dB SFDR at 140 MHz. The high sampling rate allows designers to capture wider channel bandwidths, doubling the capacity of existing systems that are typically sampling at 65 Msps.

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In addition to the 14-bit LTC2285, Linear Technology offers the pin-compatible 12-bit LTC2283 and 10-bit LTC2281 125 Msps dual ADCs. These three dual ADCs complete a 3 V family of 10-, 12- and 14-bit parts ranging from 10 Msps up to 125 Msps. The pin compatibility offers designers more flexibility during product development, providing a fast and cost-effective upgrade path for existing designs. The ADCs provide low crosstalk between channels of –110 dB.

The LTC2285 low-power family is packaged in a small 9 mm x 9 mm QFN package. The parts include integrated bypass capacitance and 50 Ω series output matching for a small total solution size. They provide the flexibility to choose between two input spans of 1 Vp-p or 2 Vp-p. The 125 Msps dual ADCs also offer a data-ready clock-out pin for latching the output data buses.

The ADCs are optimized for undersampling signals up to 140 MHz, and have a wide analog input bandwidth of 640 MHz. For downconversion signal chains, Linear Technology recommends the LT5516 direct-conversion quadrature demodulator and LT6402 300 MHz low distortion/low noise ADC driver.

Samples of the LTC2285, LTC2283 and LTC2281 are available now with production quantities in September for both commercial and industrial temperature grades. Pricing is $73.50, $41.25, $18.00, each respectively in 1000-piece quantities.