NI PXI-5670
NI PXI-5670

NI PXI-5114 | PXI Digitizer Module

  • Brand:​ National Instruments
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    Model:​ PXI-5114
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    Product Type:​ PXI Digitizer Module
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    Series:​ PXI
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    Core Function:​ Provides 8-channel high-speed data acquisition with deep memory for dynamic signal analysis.
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    Key Specs:​ 8 simultaneous channels, 250 MS/s sampling rate, 12-bit resolution, 256 MB memory.
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Part number: NI PXI-5114
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Description

PXI-5114: Product Overview
The National Instruments PXI-5114 is an 8-channel PXI digitizer module designed for high-speed data acquisition applications requiring simultaneous multi-channel measurement capability. This module functions as a multi-channel oscilloscope within a PXI system, providing synchronized acquisition across all eight channels with 12-bit resolution. The instrument is engineered for applications in research and development, production test, and condition monitoring where capturing transient events or analyzing dynamic signals across multiple points is essential.
Installed in a PXI chassis, the module operates by simultaneously sampling analog input signals across all eight channels at rates up to 250 megasamples per second (MS/s). Each channel features independent analog-to-digital conversion, ensuring precise timing alignment between channels for correlation analysis. The architecture includes deep onboard memory (256 MB total) for capturing long-duration signals or high-speed transients, with flexible sampling rate selection to optimize the trade-off between acquisition duration and time resolution. The module supports both software and hardware triggering for precise acquisition control.

NI PXI-5670

NI PXI-5670

PXI-5114: Technical Specifications
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    Model Number:​ PXI-5114
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    Manufacturer:​ National Instruments
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    Product Type:​ PXI Digitizer Module
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    Number of Channels:​ 8 simultaneous sampling channels
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    Maximum Sampling Rate:​ 250 MS/s (aggregate), 31.25 MS/s per channel when all channels active
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    Resolution:​ 12 bits
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    Input Range:​ ±5 V to ±100 V (software selectable in 6 ranges)
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    Input Impedance:​ 1 MΩ ± 1% || 13 pF typical
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    Bandwidth:​ 100 MHz (-3 dB)
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    Memory:​ 256 MB total (32 MB per channel standard)
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    Accuracy:​ ±1.5% of reading ±1.5% of range (typical)
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    Triggering:​ Software, analog, and digital triggering
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    Sync Clock:​ 10 MHz reference clock input/output
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    Data Transfer:​ PXI DMA
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    Power Consumption:​ 7 W typical
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    Operating Temperature:​ 0 °C to 55 °C
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    Relative Humidity:​ 10% to 90% non-condensing

    NI PXI-5670

    NI PXI-5670

Core Features & Customer Value
The primary value of the PXI-5114 lies in its high channel density and synchronized acquisition capability. The eight simultaneously sampling channels enable correlated measurements across multiple signal paths, which is essential for applications such as multi-phase power analysis, mechanical vibration analysis, and multi-sensor data acquisition. The independent analog-to-digital converters for each channel ensure that timing relationships between channels are preserved, eliminating skew errors that can occur in multiplexed acquisition systems.
The module’s deep onboard memory​ allows for extended data capture at high sampling rates, enabling detailed analysis of transient events or continuous monitoring of dynamic systems. The flexible memory allocation can be configured to prioritize certain channels with deeper memory while maintaining synchronization across all active channels. The software-selectable input ranges​ provide measurement flexibility, allowing the same module to handle both low-level sensor signals and higher-voltage system signals without external conditioning.
The multiple triggering options​ support complex acquisition scenarios, including pre-trigger and post-trigger configuration for capturing signal events that occur before or after a trigger condition. Integration with the PXI platform​ provides high-speed data transfer capabilities through DMA, ensuring that large data sets can be streamed to the system controller without missing data points during continuous acquisition.
Typical Applications
In power electronics testing, the module simultaneously captures voltage and current waveforms across multiple phases of motor drives or power inverters for efficiency calculations and harmonic analysis.
In structural testing applications, the digitizer acquires data from multiple accelerometers and strain gauges simultaneously to analyze vibration modes and structural dynamics.
For automotive electronics validation, the module tests electronic control units by monitoring multiple sensor inputs and actuator outputs concurrently during functional testing.
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