Analog Input; Analog Input On Mio X Series Devices - National Instruments PCIe-6323 User Manual

Analog Input

Refer to one of the following sections, depending on your device:
• Analog Input on MIO X Series
Devices—NI 632x/6341/6343/6345/6351/6353/6355/6361/6363/6365/6375 devices can
be configured for single-ended and differential analog input measurements.
• Analog Input on Simultaneous MIO X Series
Devices—NI 6346/6349/6356/6358/6366/6368/6374/6376/6378/6386/6396 devices can
be configured for differential analog input simultaneous sampled measurements.

Analog Input on MIO X Series Devices

Figure 4-1 shows the analog input circuitry of MIO X Series devices.
AI <0..207>
AI SENSE
AI GND
The main blocks featured in the MIO X Series device analog input circuitry are as follows:
• I/O Connector—You can connect analog input signals to the MIO X Series device through
the I/O connector. The proper way to connect analog input signals depends on the analog
input ground-reference settings, described in the
section. Also refer to Appendix A,
pinouts.
• Mux—Each MIO X Series device has one analog-to-digital converter (ADC). The
multiplexers (mux) route one AI channel at a time to the ADC through the NI-PGIA.
• Ground-Reference Settings—The analog input ground-reference settings circuitry selects
between differential, referenced single-ended, and non-referenced single-ended input
modes. Each AI channel can use a different mode.
Figure 4-1. MIO X Series Analog Input Circuitry
Mux
DIFF, RSE,
or NRSE
AI Terminal
Configuration
Selection
NI-PGIA
Input Range
Selection
Analog Input Ground-Reference Settings
Device-Specific Information, for device I/O connector
ADC AI FIFO
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