National-instruments Data Acquisition Device E Series Manual do Utilizador descarregar pdf (Página 81)

Analog Output

Figure 3-1 shows the analog output circuitry of E Series devices.

Figure 3-1. Analog Output Block Diagram

Many E Series boards have analog output functionality. E Series boards

that support analog output have two AO channels that are controlled by a

single clock and are capable of waveform generation. Refer to Appendix A,

Device-Specific Information, for specific information about the capabilities

of your device.

Analog Output Circuitry

DACs

Digital-to-analog converters (DACs) convert digital codes to analog

voltages.

DAC FIFO

The DAC FIFO enables analog output waveform generation. It is a

first-in-first-out (FIFO) memory buffer between the computer and the

DACs that allows you to download all the points of a waveform to your

board without host computer interaction.

AO 0

AO 1

DAC0

DAC1

AO FIFO

AO Data

AO Sample Clock

Polarity Select

Reference Select

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