LTC2285: 14-Bit 125Msps Low Power Dual ADC Enhances High Efficiency Basestation Transceivers
Linear Technology Corporation announces the LTC2285, a 14-bit 125Msps dual high-speed Analog to Digital Converter (ADC) with low power dissipation of just 395mW per channel. This high speed device is optimized for use in power efficient, multi-carrier wireless basestation transceiver applications including WiBro and WiMAX standards with performance of 71.3dB SNR and 78dB SFDR at 140MHz. The high sampling rate allows designers to capture wider channel bandwidths, doubling the capacity of existing systems that are typically sampling at 65Msps.
In addition to the 14-bit LTC2285, Linear Technology offers the pin compatible 12-bit LTC2283 and 10-bit LTC2281 125Msps dual ADCs. These three dual ADCs complete a 3V family of 10-, 12- and 14-bit parts ranging from 10Msps up to 125Msps. The pin compatibility offers designers more flexibility during product development, providing a fast and cost-effective upgrade path for existing designs. The ADCs provide very low crosstalk between channels of -110dB.
The LTC2285 low power family is packaged in a small 9mm x 9mm QFN package. The parts include integrated bypass capacitance and 50 Ohm series output matching for a small total solution size. They provide the flexibility to choose between two input spans of 1Vp-p or 2Vp-p. The 125Msps dual ADCs also offer a data-ready clock-out pin for latching the output data buses.
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