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DataConverter-Slide21

A typical plot of SFDR vs. output frequency has a characteristic as shown in the plot, with a flat region at “low” frequencies dropping off at higher frequencies. Low frequency performance is dominated by the static linearity characteristics. At a certain point the dynamic errors dominate and the SFDR is reduced as the output frequency increases. A major focus for new DAC designs is to extend the “knee” frequency at which the static and dynamic errors have equal contributions.

PTM Published on: 2009-08-24