Chapter 4
Connecting the Signals
©
National Instruments Corporation
4-21
EXTREF is the external reference input for both AO channels. You must
individually configure each AO channel for external reference selection
so that the signal applied at the external reference input is used by that
channel. If you do not specify an external reference, the channel uses the
internal reference. AO configuration options are explained in the
section of Chapter 3,
. The following ranges
and ratings apply to the EXTREF input:
•
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 AO channels and the
external reference signal.
Figure 4-12 shows how to make AO connections and the external reference
input connection to the device.
Figure 4-12.
Analog Output Connections
The external reference signal can be either a DC or an AC signal. The
device multiplies this reference signal by the DAC code (divided by the
full-scale DAC code) to generate the output voltage.
External
Reference
Signal
(optional)
V
ref
+
–
Load
Load
VOUT 0
VOUT 1
+
–
+
–
AOGND
DAC1OUT
Analog Output Channels
NI 6052E
DAC0OUT
EXTREF
Channel 1
Channel 0