AD9747-EBZ datasheet(17/28 Pages) AD

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AD9741/AD9743/AD9745/AD9746/AD9747

Rev. 0 | Page 17 of 28

TERMINOLOGY

Integral Nonlinearity (INL)

The maximum deviation of the actual analog output from the

ideal output, as determined by a straight line drawn from zero

scale to full scale.

Differential Nonlinearity (DNL)

A measure of the maximum deviation in analog output associated

with any single value change in the digital input code relative to

an ideal LSB.

Monotonicity

A DAC is monotonic if the analog output increases or remains

constant in response to an increase in the digital input.

Offset Error

The deviation of the output current from the ideal zero-scale

current. For differential outputs, 0 mA is expected at IOUTP when

all inputs are low, and 0 mA is expected at IOUTN when all inputs

are high.

Gain Error

The deviation of the output current from the ideal full-scale

current. Actual full-scale output current is determined by

subtracting the output (when all inputs are low) from the

output (when all inputs are high).

Output Compliance Range

The range of allowable voltage seen by the analog output of a

current output DAC. Operation beyond the compliance limits

may cause output stage saturation and/or a breakdown resulting

in nonlinear performance.

Temperature Drift

Temperature drift is specified as the maximum change in a

parameter from ambient temperature (25°C) to either TMIN

or TMAX and is typically reported as ppm/°C.

Spurious-Free Dynamic Range (SFDR)

The difference in decibels between the peak amplitude of a test

tone and the peak amplitude of the largest spurious signal over

the specified bandwidth.

Intermodulation Distortion (IMD)

The difference in decibels between the maximum peak ampli-

tude of two test tones and the maximum peak amplitude of

the distortion products created from the sum or difference of

integer multiples of the test tones.

Adjacent Channel Leakage Ratio (ACLR)

The ratio between the measured power of a wideband signal

within a channel relative to the measured power in an empty

adjacent channel.

Noise Spectral Density (NSD)

The measured noise power over a 1 Hz bandwidth seen at the

analog output.

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