© National Instruments 5-1 X Series User Manual
5
Analog Output
Many X Series devices have analog output functionality. X Series devices
that support analog output have either two or four AO channels that are
controlled by a single clock and are capable of waveform generation. Refer
to Appendix A, Device-Specific Information, for information about the
capabilities of your device.
Figure 5-1 shows the analog output circuitry of X Series devices.
Figure 5-1. X Series Analog Output Circuitry
The main blocks featured in the X Series analog output circuitry are as
follows:
• DACs—Digital-to-analog converters (DACs) convert digital codes to
analog voltages.
• AO FIFO—The AO FIFO enables analog output waveform
generation. It is a first-in-first-out (FIFO) memory buffer between the
computer and the DACs. It allows you to download the points of a
waveform to your X Series device without host computer interaction.
AO 2
AO 3
DAC2
DAC3
AO Data
AO FIFO
AO Sample Clock
AO Reference Select
AO 0
AO 1
DAC0
DAC1
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