AD10242
O ver voltage Recover y Tim e
D EFINITIO N O F SP ECIFICATIO NS
Analog Bandwidth
T he analog input frequency at which the spectral power of the
fundamental frequency (as determined by the FFT analysis) is
reduced by 3 dB.
T he amount of time required for the converter to recover to
0.02% accuracy after an analog input signal of the specified per-
centage of full scale is reduced to midscale.
P ower Supply Rejection Ratio
T he ratio of a change in input offset voltage to a change in
power supply voltage.
Aper tur e D elay
T he delay between the 50% point of the rising edge of the
ENCODE command and the instant at which the analog input
is sampled.
Signal-to-Noise-and-D istor tion (SINAD )
T he ratio of the rms signal amplitude (set at 1 dB below full
scale) to the rms value of the sum of all other spectral compo-
nents, including harmonics but excluding dc.
Aper tur e Uncer tainty (Jitter )
T he sample-to-sample variation in aperture delay.
Signal-to-Noise Ratio (without H ar m onics)
D iffer ential Nonlinear ity
T he ratio of the rms signal amplitude (set at 1 dB below full
scale) to the rms value of the sum of all other spectral compo-
nents, excluding the first five harmonics and dc.
T he deviation of any code from an ideal 1 LSB step.
Encode P ulse Width/D uty 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 ENCODE
pulse should be left in low state. At a given clock rate, these
specs define an acceptable Encode duty cycle.
Spur ious-Fr ee D ynam ic Range
T he ratio of the rms signal amplitude to the rms value of the
peak spurious spectral component. T he peak spurious compo-
nent may or may not be a harmonic. May be reported in dBc
(i.e., degrades as signal levels is lowered) or in dBFS (always re-
lated back to converter full scale).
H ar m onic D istor tion
T he ratio of the rms signal amplitude to the rms value of the
worst harmonic component.
Tr ansient Response
T he time required for the converter to achieve 0.02% accuracy
when a one-half full-scale step function is applied to the analog
input.
Integr al Nonlinear ity
T he deviation of the transfer function from a reference line mea-
sured in fractions of 1 LSB using a “best straight line” deter-
mined by a least square curve fit.
Two-Tone Inter m odulation D istor tion Rejection
T he ratio of the rms value of either input tone to the rms value
of the worst third order intermodulation product; reported in
dBc.
Minim um Conver sion Rate
T he encode rate at which the SNR of the lowest analog signal
frequency drops by no more than 3 dB below the guaranteed
limit.
Two-Tone SFD R
T he ratio of the rms value of either input tone to the rms value
of the peak spurious component. T he peak spurious compo-
nent may or may not be an IMD product. May be reported
in dBc (i.e., degrades as signal levels is lowered) or in dBFS
(always related back to converter full scale).
Maxim um Conver sion Rate
T he encode rate at which parametric testing is performed.
O utput P r opagation D elay
The delay between the 50% point of the rising edge of ENCODE
command and the time when all output data bits are within
valid logic levels.
REV. A
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ADI [ ADI ]
