National Instruments NI 9225E manual 7

The NI 9225E analog input channels are floating with respect to earth ground and each other. The incoming analog signal on each channel is conditioned, buffered, and then sampled by a 24-bit Delta-Sigma ADC.

Each channel provides an independent signal path and ADC, enabling you to sample all three channels simultaneously. Refer to Figure 5 for an illustration of the circuitry for one channel of the NI 9225E.

AI+

Overvoltage

AI–

Protection

ADC

Amplifier Prefilter

NI 9225E

Figure 5. Input Circuitry for One Channel of the NI 9225E

© National Instruments Corp. 7 NI 9225E Operating Instructions and Specifications