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ADS5541 Datasheet(PDF) 13 Page - Texas Instruments |
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ADS5541 Datasheet(HTML) 13 Page - Texas Instruments |
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13 / 37 page  www.ti.com THD + 10Log10 P S P D (4) Production Data ADS5541 SBAS307C – MAY 2004 – REVISED FEBRUARY 2007 Total Harmonic Distortion (THD) Reference Error THD is the ratio of the power of the fundamental (PS) The reference error is the variation of the actual to the power of the first eight harmonics (PD). reference voltage (VREFP – VREFM) from its ideal value. The reference error is typically given as a percentage. Voltage Overload Recovery Time THD is typically given in units of dBc (dB to carrier). The voltage overload recovery time is defined as the Spurious-Free Dynamic Range (SFDR) time required for the ADC to recover to within 1% of the full-scale range in response to an input voltage The ratio of the power of the fundamental to the overload of 10% beyond the full-scale range. highest other spectral component (either spur or harmonic). SFDR is typically given in units of dBc AC Power-Supply Rejection Ratio (AC PSRR) (dB to carrier). The ratio of output spectral power at a given Two-Tone Intermodulation Distortion (IMD3) frequency with respect to the injected ac-power on AVDD at that frequency. The rejected ac-input IMD3 is the ratio of the power of the fundamental (at amplitude should be limited to less than 100mVPP. frequencies f1 and f2) to the power of the worst The PSRR is typically given in units of dB. 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 full-scale range. DC Power-Supply Rejection Ration (DC PSRR) The DC PSSR is the ratio of the change in offset error to a change in analog supply voltage. The DC PSRR is typically given in units of mV/V. 13 Submit Documentation Feedback |
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