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PXI-7952R

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PXI-7952R
May 27, 2026

PXI-7952R

Product Overview The PXI-7952R is a 3U single‑slot PXI FlexRIO FPGA module developed by National Instruments (now Emerson). It is a mid‑range reconfigurable I/O (RIO) platform based on the Xilinx Virtex‑5 LX50 FPGA, equipped with 128 MB onboard DDR2 DRAM and rich logic and DSP resources. Designed for high‑speed digital interfacing, custom protocol processing, and real‑time signal processing, it requires FlexRIO adapter modules to expand analog or digital front ends. This model is discontinued, with the recommended replacement being the PXIe‑7962R (PXIe bus, updated FPGA). It supports LabVIEW FPGA graphical programming for rapid development of hardware‑level logic.

Description

Basic Information

  • Model: PXI‑7952R (Part Number: 780561‑01)

  • Form Factor: 3U single‑slot PXI module

  • FPGA: Xilinx Virtex‑5 LX50

  • Onboard Memory: 128 MB DDR2 DRAM (two independent 64 MB banks)

  • I/O Channels: 132 single‑ended, configurable as 66 differential pairs

  • Programming Environment: LabVIEW FPGA, LabVIEW Real‑Time, Windows

  • Status: Discontinued; recommended replacement: PXIe‑7962R

  • Typical Power Consumption: ~5.5 W

  • Operating Temperature: 0 °C to 55 °C

Function and Positioning

The PXI‑7952R is positioned as a mid‑range FlexRIO FPGA carrier balancing logic resources, memory capacity, and cost. It targets applications requiring moderate‑scale custom logic, high‑speed data buffering, and real‑time processing. Unlike entry‑level models (e.g., PXI‑7951R) without DRAM, its 128 MB DDR2 enables large‑capacity data caching and continuous streaming, making it suitable for complex algorithms and high‑throughput I/O. It serves as a core reconfigurable platform for PXI‑based test, measurement, and control systems, supporting flexible expansion via adapter modules.

Core Performance Parameters

FPGA Core

  • FPGA Model: Xilinx Virtex‑5 LX50

  • Logic Resources: 7,200 slices, 28,800 LUTs, 17,280 flip‑flops

  • Block RAM: 1,728 kbit (embedded)

  • DSP Slices: 48 DSP48 slices (18×18 multipliers)

  • Clock Speed: Default 40 MHz; FPGA internal up to 500 MHz; I/O up to 100 MHz

  • Configuration: LabVIEW FPGA, online reconfiguration supported

Digital I/O

  • Channel Configuration: 132 single‑ended / 66 differential pairs

  • I/O Standards: 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, LVDS, LVTTL, TTL

  • Max Rate: Single‑ended 100 MHz; differential 200 MHz

  • Functions: Input/output, counter/timer, PWM, encoder, custom protocols

Memory and Bus

  • Onboard DRAM: 128 MB DDR2 (64 MB × 2 banks), max bandwidth 6.4 GB/s

  • FIFO: 1,728 kbit block RAM

  • DMA: 3 DMA channels, 32 DMA interrupt channels; PXI bus up to 400 MB/s

  • Synchronization: PXI trigger bus, RTSI; sync accuracy <25 ns

Physical and Electrical

  • Dimensions: 3U (160 mm × 100 mm)

  • Connector: 1 × dedicated FlexRIO adapter interface

  • Power: +3.3 V, +5 V from PXI backplane

  • Weight: ~190 g

Compatible Accessories

FlexRIO Adapter Modules

  • NI‑6581: High‑speed digital I/O adapter, 100 MHz, 132 channels

  • NI‑5781: Analog input/output adapter, high‑speed signal acquisition/generation

  • NI‑5751: 16‑channel digitizer adapter, 50 MS/s, 14‑bit

  • NI FlexRIO Adapter MDK: Development kit for custom adapter design

Software

  • NI‑FlexRIO Driver: Hardware configuration, FPGA programming, DMA management

  • LabVIEW FPGA Module: Graphical FPGA development, real‑time logic design

  • LabVIEW Real‑Time: Deterministic control and data processing

Application Fields

  • High‑Speed Digital Test Systems: Functional verification of digital circuits, high‑speed pulse generation/acquisition, custom digital bus emulation.

  • Real‑Time Signal Processing: Digital filtering, FFT analysis, sensor data preprocessing, hardware‑in‑the‑loop (HIL) simulation.

  • Industrial Automation and Control: Multi‑axis motion control, encoder signal decoding, high‑speed PWM control, custom protocol conversion.

  • Aerospace and Defense: Radar signal processing, communication protocol analysis, avionics testing, high‑speed data logging.

  • Scientific Research and Instrumentation: FPGA‑based prototype development, physics experiment control, high‑speed data acquisition.

  • Semiconductor Test: Wafer testing, digital IC validation, high‑speed interface testing.


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