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Last Revised: 2013-03-19 09:30:02.0
16-Channel, 50 MS/s, 14-Bit Digitizer Adapter Module for NI FlexRIO
NI 5751
16 simultaneously sampled 50 MS/s channels
14-bit vertical resolution
2 Vpp, 50 Ω single-ended inputs with DC coupling
8 general-purpose digital input and output lines for system stimulus and control
Well-suited for applications ranging from research to large-scale deployment
Requires NI FlexRIO FPGA module
Overview
Experiments and measurements in areas such as experimental physics, nondestructive test, and medical imaging can span across tens or hundreds of channels, requiring not
only a system with high-channel density but also a way to retrieve and transfer the data and/or measurements of interest. The NI 5751 digitizer adapter module for NI FlexRIO
provides the unique combination of high-channel density, scalability with PXI and PXI Express, and a fully programmable FPGA, which you can add for tasks such as custom
triggering or inline signal processing. Eight digital inputs and outputs offer further benefits as system stimulus or control signals.
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Application and Technology
Key Specifications
Table 1. Key Typical Specifications of the NI 5751
Combined with an NI FlexRIO FPGA module, the NI 5751 provides a powerful solution for applications requiring a high-channel-count digitizer with low crosstalk, the small form
factor and scalability of PXI, and a user-accessible FPGA for custom real-time processing.
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Figure 1. NI 5751 Characteristic Dynamic Performance, Spectrum – 64 k Samples, 5.3 MHz, -1 dBFS Input Signal
Application Areas
Table 2. Applications and Example Algorithms for the NI 5751
About NI FlexRIO
The NI FlexRIO family consists of PXI and PXI Express field-programmable gate array (FPGA) modules coupled to I/O adapter modules. Programmed with the NI LabVIEW
FPGA Module, these modules together provide high-performance I/O and user-defined hardware processing on the PXI platform.
Figure 2. NI FlexRIO Architecture
NI FlexRIO FPGA modules feature the latest in FPGA technology and high-performance bus interfaces.
Table 3. NI FlexRIO FPGA Module Options
PXI Express NI FlexRIO FPGA modules feature Xilinx Virtex-5 SXT FPGAs with up to 512 MB of onboard DRAM, which you can access at bandwidths up to 3.2 GB/s. In addition
to general-purpose reconfigurable logic, SXT FPGAs are optimized for high-speed digital signal processing (DSP), with up to 640 DSP slices for single-cycle multiplication and
filtering functions. PXI Express NI FlexRIO FPGA modules also feature the NI STC-3 application-specific integrated circuit (ASIC), providing an optimized, high-bandwidth PCI
Express x4 communications link to the backplane of the PXI Express chassis. This ASIC reduces the FPGA resources needed to implement host communication and enables new
data transfer technology in the unique peer-to-peer (P2P) streaming feature. With NI P2P data streaming technology, you can continuously transfer data to and from PXI Express
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NI FlexRIO FPGA modules at rates greater than 800 MB/s for additional processing and I/O integration. You can also stream to and from select PXI Express NI modular
instruments for an even greater variety of I/O.
PXI NI FlexRIO FPGA modules feature Xilinx Virtex-5 LX FPGAs with up to 128 MB of onboard DRAM, which you can access at bandwidths up to 1.6 GB/s. They feature all the
benefits of the PXI platform including synchronization, triggering, and high-speed data transfer to and from their host.
Table 4. PXI and PXI Express FPGA Module Comparison
National Instruments and third parties offer NI FlexRIO adapter modules, and you can build your own adapter modules using the NI FlexRIO Adapter Module Development Kit
(MDK). With custom adapter modules, you can implement the exact analog and digital I/O your application requires, along with graphical FPGA programming provided by
LabVIEW. View a current list of NI and third-party adapter modules at
ni.com/flexrio
. This ability to easily create high-bandwidth P2P data streams helps provide scalable signal
processing and I/O integration.
LabVIEW FPGA
With the high-level graphical programming capabilities of LabVIEW FPGA, programming for the NI 5751 is far simpler than low-level HDL programming. Acquiring samples from
one NI FlexRIO digitizer adapter module's analog-to-digital converter at its configured rate and placing the data into an FPGA FIFO is depicted in Figure 3.
Figure 3. LabVIEW FPGA Code for Acquiring Data from an NI FlexRIO Digitizer Adapter Module
From this point, you may implement your own processing, filtering, fast Fourier transform (FFT), or control. Figure 4 shows custom demodulation using IP from the FPGA RF
Communications Library on
ni.com/labs
.
Figure 4. LabVIEW FPGA Code for Demodulating and Decoding I and Q Signals after 4X Decimation
For implementing a real-time spectrum analyzer, Figure 5 shows code that performs windowing, conversion to the frequency domain, comparison against a frequency mask, and
assertion of a trigger when that mask is exceeded.
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Figure 5. LabVIEW FPGA Code for a Real-Time Spectrum Analyzer
Finally, Figure 6 shows a custom, 128-tap inline finite impulse response (FIR) filter with reloadable coefficients. After filtering, the data is generated through a digital-to-analog
converter.
Figure 6. LabVIEW FPGA Code for an Inline Filter
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Support and Services
System Assurance Programs
NI system assurance programs are designed to make it even easier for you to own an NI system. These programs include configuration and deployment services for your NI PXI,
CompactRIO, or Compact FieldPoint system. The NI Basic System Assurance Program provides a simple integration test and ensures that your system is delivered completely
assembled in one box. When you configure your system with the NI Standard System Assurance Program, you can select from available NI system driver sets and application
development environments to create customized, reorderable software configurations. Your system arrives fully assembled and tested in one box with your software preinstalled.
When you order your system with the standard program, you also receive system-specific documentation including a bill of materials, an integration test report, a recommended
maintenance plan, and frequently asked question documents. Finally, the standard program reduces the total cost of owning an NI system by providing three years of warranty
coverage and calibration service. Use the online product advisors at ni.com/advisor to find a system assurance program to meet your needs.
Technical Support
Get answers to your technical questions using the following National Instruments resources.
Support
- Visit ni.com/support to access the NI KnowledgeBase, example programs, and tutorials or to contact our applications engineers who are located in NI sales
offices around the world and speak the local language.
Discussion Forums
- Visit forums.ni.com for a diverse set of discussion boards on topics you care about.
Online Community
- Visit community.ni.com to find, contribute, or collaborate on customer-contributed technical content with users like you.
Repair
While you may never need your hardware repaired, NI understands that unexpected events may lead to necessary repairs. NI offers repair services performed by highly trained
technicians who quickly return your device with the guarantee that it will perform to factory specifications. For more information, visit ni.com/repair.
Training and Certifications
The NI training and certification program delivers the fastest, most certain route to increased proficiency and productivity using NI software and hardware. Training builds the skills
to more efficiently develop robust, maintainable applications, while certification validates your knowledge and ability.
Classroom training in cities worldwide
- the most comprehensive hands-on training taught by engineers.
On-site training at your facility
- an excellent option to train multiple employees at the same time.
Online instructor-led training
- lower-cost, remote training if classroom or on-site courses are not possible.
Course kits
- lowest-cost, self-paced training that you can use as reference guides.
Training memberships
and training credits - to buy now and schedule training later.
Visit ni.com/training for more information.
Extended Warranty
NI offers options for extending the standard product warranty to meet the life-cycle requirements of your project. In addition, because NI understands that your requirements may
change, the extended warranty is flexible in length and easily renewed. For more information, visit ni.com/warranty.
OEM
NI offers design-in consulting and product integration assistance if you need NI products for OEM applications. For information about special pricing and services for OEM
customers, visit ni.com/oem.
Alliance
Our Professional Services Team is comprised of NI applications engineers, NI Consulting Services, and a worldwide National Instruments Alliance Partner program of more than
700 independent consultants and integrators. Services range from start-up assistance to turnkey system integration. Visit ni.com/alliance.
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Detailed Specifications
This section lists the specifications of the NI FlexRIO adapter module (NI 5751). Pair these specifications with the specifications listed in the
NI FlexRIO FPGA Module
Installation Guide and Specifications
. For more information about safety and electromagnetic compatibility refer to the
Read Me First: Safety and Electromagnetic Compatibility
document included in your hardware kit or available at
ni.com/manuals
.
Maximum
and
minimum
specifications are warranted not to exceed these values within certain operating conditions and include the effects of temperature and uncertainty unless
otherwise noted.
Characteristic
specifications are unwarranted values that are representative of an average unit operating at room temperature.
Typical
specifications are unwarranted values that are representative of a majority (90%) of units within certain operating conditions and include the effects of temperature and
uncertainty unless otherwise noted.
These specifications are characteristic at 25 °C unless otherwise noted.
Absolute Maximum Ratings
Caution
Stresses beyond those listed in this section may cause permanent damage to the adapter module. Avoid swapping the analog and digital cables because
doing so will short the digital output terminals to ground.
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