AD9129 View Datasheet(PDF) - Analog Devices
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AD9129 Datasheet PDF : 68 Pages
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Data Sheet
TERMINOLOGY
Linearity Error (Integral Nonlinearity or INL)
The maximum deviation of the actual analog output from the
ideal output, determined by a straight line drawn from zero to
full scale.
Differential Nonlinearity (DNL)
The measure of the variation in analog value, normalized to full
scale, associated with a 1 LSB change in digital input code.
Monotonicity
A DAC is monotonic if the output either increases or remains
constant as the digital input increases.
Offset Error
The deviation of the output current from the ideal of zero.
For IOUTP, 0 mA output is expected when the inputs are all 0s.
For IOUTN, 0 mA output is expected when all inputs are set to 1.
Gain Error
The difference between the actual and ideal output span. The
actual span is determined by the output when all inputs are set
to 1 minus the output when all inputs are set to 0.
Output Compliance Range
The range of allowable voltage at the output of a current output
DAC. Operation beyond the maximum compliance limits may
cause either output stage saturation or breakdown, resulting in
nonlinear performance.
Temperature Drift
Specified as the maximum change from the ambient (25°C) value
to the value at either TMIN or TMAX. For offset and gain drift, the
drift is reported in ppm of full-scale range (FSR) per degree
Celsius (°C). For reference drift, the drift is reported in ppm per °C.
Power Supply Rejection
The maximum change in the full-scale output as the supplies
are varied from nominal to minimum and maximum specified
voltages.
AD9119/AD9129
Spurious-Free Dynamic Range
The difference, in decibels (dB), between the rms amplitude of
the output signal and the peak spurious signal over the specified
bandwidth.
Total Harmonic Distortion (THD)
The ratio of the rms sum of the first six harmonic components
to the rms value of the measured input signal. It is expressed as
a percentage or in decibels (dB).
Noise Spectral Density (NSD)
The converter noise power per unit of bandwidth. This is
usually specified in dBm/Hz in the presence of a 0 dBm full-
scale signal.
Adjacent Channel Leakage Ratio (ACLR)
The ratio, in dBc, between the measured power within a channel
relative to its adjacent channels.
Adjacent Channel Power Ratio (ACPR)
The ratio, in dBc, between the total power of an adjacent channel
(intermodulation signal) to the main channel's power (useful
signal).
Modulation Error Ratio (MER)
A measure of the discrepancy between the average output
symbol magnitude and the rms error magnitude of the individual
symbol. Modulated signals create a discrete set of output values
referred to as a constellation, and each symbol creates an output
signal corresponding to one point on the constellation.
Intermodulation Distortion (IMD)
The result of two or more signals at different frequencies mixing
together. Many products are created according to the formula
aF1 ± bF2, where a and b are integer values.
Rev. 0 | Page 35 of 68
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