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AD10678 Fiches technique(PDF) 12 Page - Analog Devices
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AD10678 Fiches technique(HTML) 12 Page - Analog Devices
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Rev. C | Page 12 of 20
The analog input frequency at which the spectral power of the
fundamental frequency (as determined by the FFT analysis) is
reduced by 3 dB.
The delay between the 50% point on the rising edge of the
ENCODE command and the instant at which the analog input
Aperture Uncertainty (Jitter)
The sample-to-sample variation in aperture delay.
Differential Nonlinearity (DNL)
The deviation of any code from an ideal 1 LSB step.
Encode Pulse Width/Duty Cycle
Pulse width high is the minimum amount of time that the
encode pulse should be left in Logic 1 state to achieve rated
performance; pulse width low is the minimum time that the
encode pulse should be left in low state. At a given clock rate,
these specifications define an acceptable encode duty cycle.
Integral Nonlinearity (INL)
The deviation of the transfer function from a reference line
measured in fractions of 1 LSB using a best straight line
determined by a least square curve fit.
The ratio of the rms signal amplitude to the rms value of the
worst harmonic component.
Maximum Conversion Rate
The encode rate at which parametric testing is performed.
Minimum Conversion Rate
The encode rate at which the SNR of the lowest analog signal
frequency drops by no more than 3 dB below the guaranteed limit.
Output Propagation Delay
The delay between the 50% point of the rising edge of the
ENCODE command and the time when all output data bits
are within valid logic levels.
Power Supply Rejection Ratio (PSRR)
The ratio of a change in output offset voltage to a change in
power supply voltage.
Signal-to-Noise and Distortion (SINAD)
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, including the first five harmonics and dc. Can be
reported in dBc (that is, degrades as signal level is lowered) or
in dBFS (always related back to converter full scale).
Signal-to-Noise Ratio (SNR)
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. Can be reported in dBc
(that is, degrades as signal level is lowered) or in dBFS (always
related back to converter full scale).
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 an harmonic. Can be reported in dBc (such as,
degrades as signal level is lowered) or in dBFS (always related
back to converter full scale).
Two-Tone Intermodulation Distortion Rejection (IMD)
Ratio of the rms value of either input tone to the rms value of the
worst third-order intermodulation product; reported in dBc.
Voltage Standing-Wave Ratio (VSWR)
The ratio of the amplitude of the elective field at a voltage
maximum to that at an adjacent voltage minimum.
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