Dallas, Tex.Texas Instruments Inc. (TI) has introduced an evaluation module (EVM) designated ADS5474ADX-EVM that combines two of TI's 14-bit A/D converters (ADS5474) in an interleaved fashion with a Xilinx Virtex-5 FPGA to create a 800-MSPS digitizer.
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 wide-bandwidth communications, military, test and measurement applications.
The SP Devices' software continuously monitors the system and removes A/D converter gain, clocking and temperature mismatches to reduce the interleaving spurs below the A/D converter 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 complex systems, the EVM simplifies evaluation and helps designers bring end systems to market faster. For instance, the continuous monitoring of the A/D converter'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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Texas Instruments, www.ti.com