Measurement-computing USB-231 Manuel d'utilisateur télécharger pdf (Page 16)

USB-231 User's Guide Functional Details

Analog output

Figure 8 shows the USB-231 analog output circuitry.

Figure 8. USB-231 analog output circuitry

The main analog output circuitry blocks are as follows:



Protection – The protection circuit prevents damage of the buffers in case of a short circuit or an

overvoltage condition.



Buffer – The buffer amplifies the analog signal to the ±10 V range and ensures the driving capability for

the external load.



DAC 0 and DAC 1 – The digital-to-analog converters (DAC) convert the digital signals into low-level

analog signals.



AO FIFO – The AO FIFO (first-in-first out) ensures that data is transferred to the DACs in a timely manner

without being affected by USB latencies.



DAC Control – The DAC control sets the DAC data rate and the startup condition, which could be

triggered by the

TRIG signal.

Analog output signals are referenced to AGND. Connect the loads between AOUT0 or AOUT1 and AGND as

shown in .

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Measurement-computing USB-231 Manuel d'utilisateur Page 16