Digital Trigger; Analog Output; Analog Output Circuitry; Dacs - National Instruments USB-6008 User Manual And Specifications

Digital Trigger

Analog Output

Analog Output Circuitry

USB-6008/6009 User Guide and Specifications
Voltage
Source
Figure 9. Connecting a Differential Voltage Signal
When an AI task is defined, you can configure PFI 0 as a digital trigger
input. When the digital trigger is enabled, the AI task waits for a rising edge
on PFI 0 before starting the acquisition. To use ai/Start Trigger with a
digital source, specify PFI 0 as the source and select rising edge.
The USB-6008/6009 has two independent AO channels that can generate
outputs from 0–5 V. All updates of AO lines are software-timed.
Figure 10 illustrates the analog output circuitry for the USB-6008/6009.
+5 V
REF(+) REF(–)
12-Bit
DAC
GND

DACs

Digital-to-analog converts (DACs) convert digital codes to analog
voltages.
AI
USB-6008/6009
GND
Output
Buffer
Figure 10. Analog Output Circuitry
14
50 Ω
AO
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