6 | ni.com | NI myRIO-1950 User Guide and Specifications
Analog Input Channels
The NI myRIO-1950 has analog input channels on myRIO Expansion Port (MXP) connectors A
and B. The analog inputs are multiplexed to a single analog-to-digital converter (ADC) that
samples all channels.
MXP connectors A and B have four single-ended analog input channels per connector, AI0-AI3,
which you can use to measure 0-5 V signals.
Note For important information about improving measurement accuracy by
reducing noise, go to ni.com/info and enter the Info Code analogwiring.
Figure 4 shows the analog input topology of the NI myRIO-1950.
Figure 4. NI myRIO-1950 Analog Input Topology
DIO <0..15> DGND Input or
Output
General-purpose digital lines with 3.3 V
output, 3.3 V/5 V-compatible input. Refer to
the DIO Lines section for more information.
UART.RX DGND Input UART receive input. UART lines are
electrically identical to DIO lines.
UART.TX DGND Output UART transmit output. UART lines are
electrically identical to DIO lines.
DGND N/A N/A Reference for digital signals, +5 V, and +3.3 V.
Table 1. Descriptions of Signals on MXP Connectors A and B (Continued)
Signal Name Reference Direction Description
MUX
ADC
AI0
AI1
AI2
AI3
AI0
AI1
AI2
AI3
0–5 V
MXP A
MXP B
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