Datasheet

Data Sheet AD5696R/AD5695R/AD5694R
Rev. B | Page 17 of 32
Analog Crosstalk
This is the glitch impulse transferred to the output of one DAC
due to a change in the output of another DAC. It is measured by
loading one of the input registers with a full-scale code change
(all 0s to all 1s and vice versa). Then execute a software LDAC
and monitor the output of the DAC whose digital code was not
changed. The area of the glitch is expressed in nV-sec.
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 monitor-
ing 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)
This 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 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 tempera-
ture range expressed in ppm/°C as follows;
6
10×
×
=
TempRangeV
VV
TC
REFnom
REFminREFmax
where:
V
REFmax
is the maximum reference output measured over the
total temperature range.
V
REFmin
is the minimum reference output measured over the total
temperature range.
V
REFnom
is the nominal reference output voltage, 2.5 V.
TempRange is the specified temperature range of40°C to
+105°C.