Introduction

NI FlexRIO modules combine high-speed analog-to-digital conversion with the reconfigurable power of FPGAs, making them ideal for advanced signal processing, radar prototyping, and communications testing. In this article, we review the top 5 NI FlexRIO modules tailored for high-speed A/D conversion tasks.

1. NI PXIe-5186 – 12.5 GS/s Digitizer

The NI PXIe-5186 delivers ultra-fast sampling at 12.5 GS/s and 8-bit resolution. This module is designed for extreme bandwidth and is ideal for RF recording, radar, and defense applications.

• Sample Rate: 12.5 GS/s
• Resolution: 8-bit
• Bandwidth: >5 GHz

2. NI PXIe-5172 – 250 MS/s with FPGA

This 8-channel 14-bit FlexRIO digitizer offers 250 MS/s per channel and onboard Xilinx Kintex-7 FPGA. The PXIe-5172 is perfect for high-speed multichannel data acquisition and custom triggering.

• Sample Rate: 250 MS/s
• Resolution: 14-bit
• FPGA: User-programmable

3. NI PXIe-5775 – Wideband A/D FlexRIO Adapter

Combining 16-bit resolution with a sample rate of 1.25 GS/s, the PXIe-5775 offers wideband performance for broadband communications and software-defined radio (SDR).

• Sample Rate: 1.25 GS/s
• Resolution: 16-bit
• Bandwidth: 600 MHz

4. NI PXIe-5164 – High Voltage Digitizer

For high-voltage transient capture and industrial A/D needs, the NI PXIe-5164 provides 1 GS/s at 14 bits and up to 250V input range. Ideal for power electronics and fault analysis.

• Sample Rate: 1 GS/s
• Resolution: 14-bit
• Input Range: ±250V

5. NI PXIe-5772 – 1 GS/s Dual-Channel A/D

Featuring 2 analog input channels at 1 GS/s and 14-bit resolution, the PXIe-5772 is ideal for baseband RF acquisition and optical digitization applications.

• Sample Rate: 1 GS/s
• Resolution: 14-bit
• Ideal for: RF baseband, photonics

Choosing the Right FlexRIO Module

Consider the following before choosing your FlexRIO A/D conversion module:

• Required sample rate and resolution
• Number of channels
• Signal bandwidth and input voltage
• Need for onboard FPGA and customization

Frequently Asked Questions

What is FlexRIO used for?

NI FlexRIO is used for high-performance data acquisition, digital signal processing, and real-time test systems.

Can I program the FPGA on a FlexRIO module?

Yes. Most FlexRIO modules include a user-programmable FPGA with support from LabVIEW FPGA.

Which FlexRIO is best for RF digitization?

The PXIe-5186 and PXIe-5775 are ideal for high-frequency and wideband RF capture.

Conclusion

Whether you're working in defense, telecommunications, or academic research, NI FlexRIO modules offer unmatched flexibility and performance for high-speed A/D conversion. For personalized recommendations, browse our online catalog or talk to an engineer at Sohoprolab today.