12-bit A/D provides 1.2-GHz input bandwidth

Milpitas, Calif. — Linear Technology Corp. unveiled a 12-bit analog-to-digital (A/D) sampling converter today that touts a 1.2-GHz analog input bandwidth along with the lowest power consumption in its class for wideband sampling applications.

LTC's LTC2242-12 is a high, intermediate frequency (IF) A/D converter, sampling at 250 megasamples/s. Operating on a 2.5-volt supply, the device consumes 740 milliwatts.

The LTC2242-12 A/D converter can be driven with an analog input range of 2-V peak to peak to enable signal-to-noise (SNR) performance of 65.1 dB at 240-MHz input frequency, with spurious-free dynamic range (SFDR) of 74 dB.

Applications include wireless and wired broadband communication, cable head-end systems power amplifier linearization and communications test equipment.

The A/D converter is part of a family of 10- and 12-bit A/D converters, sampling at 170 Msamples/s, 210 Msamples/s and 250 Msamples/s. It is pin-compatible with LTC's existing 3.3-V LTC2220 family, offering an upgrade path to higher sampling rates with considerably lower power dissipation, according to LTC.

These parts provide the flexibility to select between low-voltage differential signaling (LVDS), full-rate CMOS or demultiplexed CMOS outputs to interface to digital down converters (DDCs). The digital output supply can be powered from 0.5 V to 2.6 V, allowing direct connection to low-voltage digital interfaces.

The LTC2242-12 low power family is available in a 64-pin, 9 x 9mm QFN package, and includes integrated bypass capacitance that further reduces the overall solution size.

The LTC2242-12 family is supported with LVDS demo boards that can be purchased online. Samples of the LTC2242-12 family are available today, with production planned for May. The device is available in both commercial and industrial temperature grades.

See related art

Pricing for the LTC2242-12 is $59.00 each in 1,000-piece quantities. Click here for the LTC2242-12 data sheet.

Linear Technology Corp. , 1-800-454-6327,

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