AD9218 datasheet(12/29 Pages) AD

12 / 29 page

AD9218

Rev. C | Page 11 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. Reported in dBc (that is,

degrades as signal level is lowered) or dBFS (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; reported 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. Reported in dBc (that is,

degrades as signal level is lowered) or in dBFS (always related

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

harmonics) reported in dBc.

Transient Response Time

Transient response is defined as 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

Out-of-range recovery time is 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.

AD9218 Datasheet(PDF) 12 Page - Analog Devices