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CS5180 Datasheet(PDF) 19 Page - Cirrus Logic |
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CS5180 Datasheet(HTML) 19 Page - Cirrus Logic |
19 / 28 page CS5180 19 PARAMETER DEFINITIONS Differential Non-Linearity Error - DNL The deviation of a code’s width from ideal. Units in LSBs. Integral Non-Linearity Error - INL The deviation of a code from a straight line passing through the endpoints of the transfer function after zero- and full-scale errors have been accounted for. "Zero-scale" is a point 1/2 LSB below the first code transition and "full-scale" is a point 1/2 LSB beyond the code transition to all ones. The deviation is measured from the middle of each particular code. Units in LSB’s. Full-Scale Error - FSEP The deviation of the last code transition from the ideal (VREF-3/2 LSB’s). Units in LSB’s. Offset Error - VOS The deviation of the mid-scale transition from the ideal (1/2 LSB below 0 Volts). Units in LSB’s. Spurious-Free-Dynamic-Range - SFDR The ratio of the rms value of the full-scale signal, to the rms value of the next largest spectral component (excepting dc). This component is often an aliased harmonic when the signal frequency is a significant proportion of the sampling rate. Units in dBc (decibels relative to the carrier). Total Harmonic Distortion - THD The ratio of the rms sum of the significant harmonics (2nd through 7th), to the rms value of the full-scale signal. Units in decibels. Dynamic Range - DR The ratio of the rms value of the inferred full-scale signal, to the rms sum of the broadband noise signals below the Nyquist rate (excepting dc and distortion terms). Expressed in decibels. Dynamic Range is tested with a 22 kHz input signal 60 dB below full scale. 60 dB is then added to the resulting number to refer the noise level to the full-scale signal. This technique ensures that the distortion components are below the noise level and do not affect the measurement. Signal-to-Noise-and-Distortion (s/[n+d]) - SINAD The ratio of the rms value of the full-scale signal, to the rms sum of all other spectral components below the Nyquist rate (excepting dc), including distortion components. Expressed in decibels. Group Delay The time delay through the digital filter section of the part. Units in seconds. |
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