National Instruments NI USB-621x - Manual (Page 68)

© National Instruments Corporation 7-1 NI USB-621x User Manual
7
Analog Output
Many M Series devices have analog output functionality. NI 621x devices
that support analog output have two AO channels controlled by a single
clock and capable of waveform generation. Refer to Appendix A,
Device-Specific Information , for information about the capabilities of your
device.
Figure 7-1 shows the analog output circuitry of M Series devices.
Figure 7-1. M Series Analog Output Circuitry
Analog Output Circuitry
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
AO Sample Clock
AO Data AO FIFO
AO 0
AO 1
DAC0
DAC1
Isolation
Barrier
(USB-6215
and USB-6218
devices only)
Digital
Isolators