AD9480 datasheet(11/29 Pages) AD

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AD9480

Rev. A | Page 10 of 28

Signal-to-Noise and Distortion (SINAD)

The ratio of the rms signal amplitude (set 1 dB below full scale)

to the rms value of the sum of all other spectral components,

including harmonics, but excluding dc.

Signal-to-Noise Ratio (Without Harmonics)

The ratio of the rms signal amplitude (set at 1 dB below full

scale) to the rms value of the sum of all other spectral

components, excluding the first five harmonics and dc.

Spurious-Free Dynamic Range (SFDR)

The ratio of the rms signal amplitude to the rms value of the

peak spurious spectral component. The peak spurious

component may or may not be a harmonic. It also may be

reported in dBc (that is, degrades as signal level is lowered) or

dBFS (that is, always related back to converter full scale).

Two-Tone Intermodulation Distortion Rejection

The ratio of the rms value of either input tone to the rms value

of the worst third-order intermodulation product in dBc.

Two-Tone SFDR

The ratio of the rms value of either input tone to the rms value

of the peak spurious component. The peak spurious component

may or may not be an IMD product. It also may be reported in

dBc (that is, degrades as signal level is lowered) or in dBFS (that

is, always relates back to converter full scale).

Worst Other Spur

The ratio of the rms signal amplitude to the rms value of the

worst spurious component (excluding the second and third

harmonic), reported in dBc.

Transient Response Time

The time it takes for the ADC to reacquire the analog input

after a transient from 10% above negative full scale to 10%

below positive full scale.

Out-of-Range Recovery Time

The time it takes for the ADC to reacquire the analog input

after a transient from 10% above positive full scale to 10% above

negative full scale, or from 10% below negative full scale to 10%

below positive full scale.

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