National Instruments myRIO-1950 User Manual

NI myRIO-1950 User Guide and Specifications | © National Instruments | 7
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 Analog Output section of 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.
Figure 5. NI myRIO-1950 Analog Output Topology
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 Accelerometer section
of the Specifications for the accelerometer sample rates.
Converting Raw Data Values to Voltage
You can use the following equations to convert raw data values to volts:
V = Raw Data Value * LSB Weight
LSB Weight = Nominal Range ÷ 2
ADC Resolution
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.)
DAC
DAC
DAC
DAC
0–5 V
MXP A
MXP B
AO0
AO1
AO0
AO1

National Instruments myRIO-1950 Specifications

General

Brand	National Instruments
Model	myRIO-1950
Category	I/O Systems
Language	English