ADLINK Technology NuDAQ 6208 Series, User Manual

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Operation Theorem
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4
Operation Theorem
In this chapter, the detail operation theorem of 6208 series cards is
described. Before programming or applying the 6208 series cards to
your applications, please go through this chapter to understand the
features of the functions.
4.1 Voltage Output
The DA converters used on the cPCI/PCI-6208 are Burr-Brown PCM-
56U. The DAC is 16 bit resolution with bi-polar output. The voltage
output range is +/-10V. Therefore, the data register are all 16-bits value
with sign. The digital value range from -32768 (0X8000) to +32767
(0x7FFF) is corresponding to -10 Volt to +10 Volt. Table 3.1 shows the
relation between the digital value and the analog output voltage.
When the applications use smaller voltage range, the cPCI/PCI-6208
can still be applied. For example, if the application voltage range is uni-
polar 0~5V, the user just use digital value range of 0~16384 with 14 bit
voltage resolution.