Chapter 4
Analog Input
©
National Instruments
4-41
X Series User Manual
Analog Input on Simultaneous MIO X Series Devices
Fig
u
re 4-25 shows the analog inp
u
t circ
u
itry of the Sim
u
ltaneo
u
s MIO
X Series devices.
Figure 4-25.
Simultaneous MIO X Series Analog Input Circuitry
On Sim
u
ltaneo
u
s MIO X Series devices, each channel
u
ses its own
instr
u
mentation amplifier, FIFO, m
u
ltiplexer (m
u
x), and A/D converter
(ADC) to achieve sim
u
ltaneo
u
s data acq
u
isition. The main blocks feat
u
red
in the Sim
u
ltaneo
u
s MIO X Series device analog inp
u
t circ
u
itry are as
follows:
•
I/O Connector
—Yo
u
can connect analog inp
u
t signals to the
Sim
u
ltaneo
u
s MIO X Series device thro
u
gh the I/O connector. Refer to
Appendix A,
Device-Specific Information
, for device I/O connector
pino
u
ts.
•
Instrumentation Amplifier (NI-PGIA)
—The NI programmable gain
instr
u
mentation amplifier (NI-PGIA) can amplify or atten
u
ate an AI
signal to ens
u
re that yo
u
get the maxim
u
m resol
u
tion of the ADC. The
NI-PGIA also allows yo
u
to select the inp
u
t range.
•
ADC
—The analog-to-digital converter (ADC) digitizes the AI signal
by converting the analog voltage into a digital n
u
mber.
•
Analog Input Timing Signals
—For information abo
u
t the analog
inp
u
t timing signals available on Sim
u
ltaneo
u
s MIO X Series devices,
refer to the
Analog Input Timing Signals
section.
NI-PGIA
+
–
AI Data
Analog Input Timing Signals
ADC
AI FIFO
+
–
ADC
I/O Connector
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