Texas Instruments recently introduced an evaluation module (EVM) that combines TI’s fastest 14-bit analog-to-digital converters (ADCs) in an interleaved fashion with a Xilinx FPGA to create what it claims is the best-performing high-speed digitiser solution on the market.
The FPGA comes pre-installed with SP Devices’ proprietary time-interleaving technology to eliminate interleaving spurs, which enhances performance and facilitates rapid system-level evaluation for wireless communications, military, test and measurement applications.
The ADS5474ADX-EVM incorporates two of TI’s ADS5474 ADCs, a Xilinx Virtex-5 FPGA and SP Devices’ time-interleaving technology to deliver an 800 MSps ADC solution. SP Devices’ software continuously monitors the system and removes ADC gain, clocking and temperature mismatches to reduce the interleaving spurs below the ADC harmonic spurs. By reducing the interleaving spurs, the software increases spurious free dynamic range (SFDR) from 45,78 dBc to 86,44 dBc for a 70 MHz input signal.
In addition to improved performance for systems such as software-defined radio, advanced imaging and multicarrier systems, the EVM simplifies evaluation and helps designers bring end systems to market faster. For instance, the continuous monitoring of the ADC’s mismatch eliminates the need for an off-line re-calibration routine to account for changes in temperature or other environmental factors, reducing system evaluation and design time.
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