ADLINK PXI-2502 - Manual (Page 33)

Operation Theorem
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4.2 D/A Conversion
DAQ/PXI-2500 series offers flexible and versatile analog output scheme to
fit users’ complex field applications. In order to take full advantages of
DAQ/PXI-2500 series, we suggest users carefully read the following con-
tents.
Architecture
There are up to 8-channel of 12-bit Digital-to-Analog Converter (DAC)
available in the DAQ/PXI-2502. Four D/A channels are packed into one
D/A group, i.e., DAQ/PXI-2502 contains two D/A groups, and
DAQ/PXI-2501 has only one D/A group.
Figure 4.2.1 Block Diagram of D/A Group
(Group B of DAQ/PXI-2502 is identical to Group A shown above)
Figure 4.2.1 shows the D/A block diagram. DAC are controlled implicitly by
CPLD and have their outputs updated only when digital codes for all en-
abled DA channels are ready and latched. This ensures D/A conversions
to be synchronized for each channel in the same D/A group. Users can
utilize this property to perform multi-channel waveform generation without
any phase-lag.