National Instruments VXI-MIO Series - Manual (Page 67)

Chapter 4 Signal Connections
 National Instruments Corporation 4-21 VXI-MIO Series User Manual
external reference input to be used by that channel. If you do not specify
an external reference, the channel will use the internal reference.
You
cannot use an external analog output reference with the
VXI-MIO-64XE-10.
Analog output configuration options are explained
in the Analog Output section in Chapter 3, Hardware Overview . The
following ranges and ratings apply to the EXTREF input signal:
• Usable input voltage range:
±
11 V peak with respect to AOGND
• Absolute maximum ratings:
±
15 V peak with respect to AOGND
AOGND is the ground reference signal for both analog output channels
and the external reference signal.
Figure 4-8 shows how to make analog output connections and the
external reference input connection to your VXI-MIO Series module.
Figure 4-8. Analog Output Connections
The external reference signal can be either a DC or an AC signal. The
module multiplies this reference signal by the DAC code (divided by
the full-scale DAC code) to generate the output voltage.
+
-
+
-
+
-
Channel 0
Channel 1
External
Reference
Signal
(Optional)
Load
Load
V
OUT
0
V
OUT
1
DAC1OUT
AOGND
DAC0OUT
EXTREF
Analog Output Channels
VXI-MIO Series Board
V
ref