Chapter 1
26
Analog Output Features
This section describes the following features specific to the analog output (D/A) subsystem:
• Analog output channels, described below
• Output resolution, described on
• Output range and gain, described on
• Output filters, described on
• Data format, described on
• Data transfer, described on
• Error conditions, described on
Analog Output Channels
The DT9841, DT9841E, DT9841-VIB, and DT9842/2 modules support two analog output
channels (0 and 1) that are simultaneously clocked. The DT9842/8 module supports eight
analog output channels (0 to 7).
On the DT9841, DT9841E, and DT9841-VIB modules, these analog output channels use
Delta-Sigma digital-to-analog converters (DACs) that provide anti-aliasing filters based on the
clock rate to reduce noise. On the DT9842/2 and DT9842/8, these analog output channels use
successive approximation DACs (no filtering is supported).
Within each DAC, the digital data is double-buffered to prevent spurious outputs before it is
output as an analog signal. Both DACs power up to a value of 0 V ±10 mV. Resetting the
module does not clear the values in the DACs.
Refer to the
DT9840 Series Getting Started Manual
for information on how to wire analog
output signals to the module.
Output Resolution
The output resolution of the DT9841, DT9841E, and DT9841-VIB modules is fixed at 24 bits.
The output resolution of the DT9842/2 and DT9842/8 modules is fixed at 16 bits.
Output Range and Gain
Each analog output channel on a DT9841, DT9841E, or DT9841-VIB module can output
bipolar analog output signals in the range of ±10 V or ±2.5 V. The output range is
software-selectable. The gain is fixed at 1.
The DT9842/2 and DT9842/8 modules support an output range of ±10 V only.
Summary of Contents for DT9840 Series
Page 1: ...DT9840 Series UM 19197 T User s Manual Title Page ...
Page 4: ......
Page 44: ...Chapter 1 44 ...
Page 76: ...Chapter 2 76 ...
Page 98: ...Appendix A 98 ...
Page 124: ...Appendix B 124 ...