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ADS5553IPFPR 数据表(PDF) 10 Page - Texas Instruments |
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ADS5553IPFPR 数据表(HTML) 10 Page - Texas Instruments |
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10 / 24 page ![]() ADS5553 SLWS158 − FEBRUARY 2005 www.ti.com 10 DEFINITION OF SPECIFICATIONS Total Harmonic Distortion (THD) THD is the ratio of the power of the fundamental (PS) to the power of the first eight harmonics (PD). THD + 10Log10 P S PD THD is typically given in units of dBc (dB to carrier). Spurious-Free Dynamic Range (SFDR) The ratio of the power of the fundamental to the highest other spectral component (either spur or harmonic). SFDR is typically given in units of dBc (dB to carrier). Two-Tone Intermodulation Distortion IMD3 is the ratio of the power of the fundamental (at frequencies f1 and f2) to the power of the worst spectral component at either frequency 2f1−f2 or 2f2−f1. IMD3 is either given in units of dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range. |
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