AD5697R datasheet(16/27 Pages) AD

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AD5697R

Data Sheet

Rev. B | Page 16 of 27

DAC-to-DAC Crosstalk

This is the glitch impulse transferred to the output of one DAC

due to a digital code change and subsequent analog output change

of another DAC. It is measured by loading the attack channel

with a full-scale code change (all 0s to all 1s and vice versa), using

the write to and update commands while monitoring the output

of the victim channel that is at midscale. The energy of the glitch is

expressed in nV-sec.

Multiplying Bandwidth

The amplifiers within the DAC have a finite bandwidth. The

multiplying bandwidth is a measure of this. A sine wave on the

reference (with full-scale code loaded to the DAC) appears on

the output. The multiplying bandwidth is the frequency at which

the output amplitude falls to 3 dB below the input.

Total Harmonic Distortion (THD)

THD is the difference between an ideal sine wave and its attenuated

version using the DAC. The sine wave is used as the reference

for the DAC, and the THD is a measurement of the harmonics

present on the DAC output. It is measured in dB.

Voltage Reference Temperature Coefficient (TC)

Voltage reference TC is a measure of the change in the reference

output voltage with a change in temperature. The reference TC

is calculated using the box method, which defines the TC as the

maximum change in the reference output over a given temperature

range expressed in ppm/°C as follows;













−

TempRange

REFnom

REFmin

REFmax

where:

VREFmax is the maximum reference output measured over the total

temperature range.

VREFmin is the minimum reference output measured over the total

temperature range.

VREFnom is the nominal reference output voltage, 2.5 V.

TempRange is the specified temperature range of −40°C to +105°C.

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