NI USB 6008.pdf
NI USB 6008.pdf
NI USB 6008.pdf
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Analog Output<br />
Analog Output Circuitry<br />
The <strong>NI</strong> <strong>USB</strong>-6008/6009 has two independent AO channels that can<br />
generate outputs from 0–5 V. All updates of AO lines are software-timed.<br />
Figure 11 illustrates the analog output circuitry for the <strong>NI</strong> <strong>USB</strong>-6008/6009.<br />
+5 V<br />
REF(+) REF(–)<br />
12-Bit<br />
DAC<br />
Output<br />
Buffer<br />
50 Ω<br />
AO<br />
GND<br />
DACs<br />
Connecting Analog Output Loads<br />
Figure 11. Analog Output Circuitry<br />
Digital-to-analog converts (DACs) convert digital codes to analog<br />
voltages.<br />
To connect loads to the <strong>NI</strong> <strong>USB</strong>-6008/6009, connect the positive lead of the<br />
load to the AO terminal, and connect the ground of the load to a GND<br />
terminal.<br />
AI<br />
Voltage<br />
Source<br />
<strong>NI</strong> <strong>USB</strong>-6008/6009<br />
GND<br />
Figure 12. Connecting a Load<br />
<strong>NI</strong> <strong>USB</strong>-6008/6009 User Guide and Specifications 16 ni.com
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