AD9735BBC datasheet(17/72 Pages) AD

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AD9734/AD9735/AD9736

Rev. A | Page 17 of 72

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

IOUTA, 0 mA output is expected when the inputs are all 0s. For

IOUTB, 0 mA output is expected when all inputs are set to 1s.

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 1s minus the output when all inputs are set to 0s.

Output Compliance Range

The range of allowable voltage at the output of a current output

DAC. Operation beyond the maximum compliance limits can

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

°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.

Settling Time

The time required for the output to reach and remain within a

specified error band about its final value, measured from the

start of the output transition.

Glitch Impulse

Asymmetrical switching times in a DAC give rise to undesired

output transients that are quantified by a glitch impulse. It is

specified as the net area of the glitch in pV-s.

Spurious-Free Dynamic Range

The difference, in 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).

Multitone Power Ratio

The spurious-free dynamic range containing multiple carrier

tones of equal amplitude. It is measured as the difference

between the rms amplitude of a carrier tone to the peak

spurious signal in the region of a removed tone.

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