CS4373A Datasheet, PDF (30/34 Pages) Cirrus Logic – Low-power, High-performance Test DAC

CS4373A
10. TERMINOLOGY
• Signal-to-Noise Ratio (Dynamic Range) - Ratio of the rms magnitude of the full-scale signal to the integrated
rms noise from DC to 430 Hz. The following formula is used to calculate SNR:
( ^{SNR = 20log}
rms magnitude of full scale signal
rms magnitude of noise floor
• Total Harmonic Distortion - Ratio of the power of the fundamental frequency to the sum of the powers of all
harmonic frequencies from DC to 430 Hz. The following formula is used to calculate THD:
( ^{THD = 10log}
sum of the powers of the harmonic frequencies
power of the fundamental frequency
• Full-scale Bandwidth - The bandwidth in which the converter can generate a full-scale signal while maintaining
performance specifications.
• Impulse Amplitude - The maximum amplitude of the output signal beyond the full-scale bandwidth.
• Differential Output Level - The voltage between the analog output pins of the device.
• Full-scale Accuracy - Variation in the measured output voltage from the theoretical full-scale output voltage at
1x attenuation. The following formula is used to calculate full-scale accuracy:
( ^{full scale accuracy =}
measured full scale voltage - theoretical full scale voltage
theoretical full scale voltage
•100%
• Relative Accuracy - Variation in the measured output voltage from the theoretical attenuated output voltage at
each of the attenuation ranges. The following formula is used to calculate relative accuracy:
( ^{relative accuracy =}
measured attenuated voltage - theoretical attenuated voltage
theoretical attenuated voltage (relative to the measured full scale voltage)
•100%
• Full Scale Drift - The variation of the measured full-scale voltage across the specified temperature range.
• Common Mode Drift - The variation in the measured common mode voltage across the specified temperature
range.
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