©
National Instruments
5-1
X Series User Manual
5
Analog Output
Many X Series devices have analog o
u
tp
u
t f
u
nctionality. X Series devices
that s
u
pport analog o
u
tp
u
t have either two or fo
u
r AO channels that are
controlled by a single clock and are capable of waveform generation. Refer
to Appendix A,
Device-Specific Information
, for information abo
u
t the
capabilities of yo
u
r device.
Fig
u
re 5-1 shows the analog o
u
tp
u
t circ
u
itry of X Series devices.
Figure 5-1.
X Series Analog Output Circuitry
The main blocks feat
u
red in the X Series analog o
u
tp
u
t circ
u
itry are as
follows:
•
DACs
—Digital-to-analog converters (DACs) convert digital codes to
analog voltages.
•
AO FIFO
—The AO FIFO enables analog o
u
tp
u
t waveform
generation. It is a first-in-first-o
u
t (FIFO) memory b
u
ffer between the
comp
u
ter and the DACs. It allows yo
u
to download the points of a
waveform to yo
u
r X Series device witho
u
t host comp
u
ter interaction.
AO 2
AO
3
DAC2
DAC
3
AO D
a
t
a
AO FIFO
AO
Sa
mple Clock
AO Reference
S
elect
AO 0
AO 1
DAC0
DAC1
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