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Analog Output Channels
The NI myRIO-1950 has analog output channels on myRIO Expansion Port (MXP) connectors
A and B. Each analog output channel has a dedicated digital-to-analog converter (DAC), so they
can all update simultaneously. The DACs for the analog output channels are controlled by a
serial communication bus from the FPGA. MXP connectors A and B share one bus Therefore,
the maximum update rate is specified as an aggregate figure in the
Specifications.
MXP connectors A and B have two analog output channels per connector, AO0 and AO1, which
you can use to generate 0-5 V signals.
Figure 5 shows the analog output topology of the NI myRIO-1950.
Accelerometer
The NI myRIO-1950 contains a three-axis accelerometer. The accelerometer samples each axis
continuously and updates a readable register with the result. Refer to the
of the
Specifications
Converting Raw Data Values to Voltage
You can use the following equations to convert raw data values to volts:
where Raw Data Value is the value returned by the FPGA I/O Node,
LSB Weight is the value in volts of the increment between data values,
Nominal Range is the absolute value in volts of the full, peak-to-peak nominal range
of the channel,
and ADC Resolution is the resolution of the ADC in bits. (ADC Resolution = 12.)
Figure 5. NI myRIO-1950 Analog Output Topology
DAC
DAC
DAC
DAC
for the accelerometer sample rates.
V = Raw Data Value * LSB Weight
LSB Weight = Nominal Range ÷ 2
NI myRIO-1950 User Guide and Specifications | © National Instruments | 7
Analog Output
AO0
MXP A
AO1
0–5 V
AO0
MXP B
AO1
ADC Resolution
section of the
Accelerometer
section
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