NI PXIE-4139 high-performance PXI Express Source Measure Unit

The NI PXIe-4139 is a high-performance PXI Express Source Measure Unit (SMU) developed by National Instruments (NI), designed to deliver precise voltage sourcing and current measurement for automated test and characterization of electronic components. As a key member of NI’s PXIe SMU family, the NI PXIe-4139 integrates dual functionality—sourcing stable voltage/current and measuring resulting current/voltage/power—in a compact 3U module, eliminating the need for separate power supplies and multimeters in test systems.

Unlike standalone SMUs, the NI PXIe-4139 leverages PXIe’s high-speed connectivity (x4 lane) and synchronization capabilities (TClk, PXIe triggers) to integrate seamlessly with other PXIe instruments (e.g., DAQ cards, multiplexers). This makes the NI PXIe-4139 ideal for applications like semiconductor component testing, battery cell characterization, and sensor calibration—where coordinated sourcing and measurement are critical. Its 20-bit resolution and ±0.01% sourcing accuracy ensure reliable results for low-power devices (e.g., IoT sensors) and high-current components (e.g., power management ICs), while its 20 W power rating covers a wide range of DUT (Device Under Test) requirements. Whether used in R&D labs for component modeling or manufacturing lines for quality control, the NI PXIe-4139 delivers the precision and flexibility needed for modern test workflows.

Detailed parameter table

Core advantages and technical highlights

Precision Sourcing & Measurement for Component Characterization: The NI PXIe-4139’s 20-bit resolution and industry-leading accuracy (e.g., ±0.01% voltage sourcing accuracy) enable detailed characterization of electronic components. For example, when testing a lithium-ion battery cell, the NI PXIe-4139 sources a 0–4.2 V charging current (±1 A range) and measures the resulting current with 100 pA resolution—capturing subtle changes in cell impedance that indicate degradation. This level of precision surpasses entry-level SMUs (16–18-bit resolution) and ensures compliance with standards like IEC 61960 for battery performance.

PXIe Synchronization for Multi-Instrument Test Systems: The NI PXIe-4139 supports PXIe triggers and TClk (Timing and Clock) technology, enabling sub-10 ns synchronization with other PXIe modules (e.g., NI PXIe-4082 DMM, NI PXIe-6255 DAQ). In a semiconductor wafer test rig, for instance, the NI PXIe-4139 sources a bias voltage to a MOSFET (DUT) while a NI PXIe-4082 measures the drain current—both triggered simultaneously by a NI PXIe-6674T timing module. This alignment ensures that voltage changes and current responses are correlated, avoiding timing skew that could invalidate device performance metrics like on-resistance (Rds(on)).

Compact Form Factor & Scalability: At 3U PXIe size, the NI PXIe-4139 occupies 70% less space than a standalone SMU, making it ideal for high-density test systems. A consumer electronics manufacturer, for example, uses 8 NI PXIe-4139 modules in a single NI PXIe-1085 chassis to test 8 smartphone power management ICs (PMICs) in parallel. Each module sources voltage to the PMIC’s input and measures output current, cutting test time per IC by 80% compared to a single standalone SMU. Additionally, the module’s PXIe x4 lane interface supports high-speed data transfer (up to 1 GB/s), enabling real-time logging of 1 kS/s measurement data for long-duration tests.

User-Configurable Protection for DUT Safety: The NI PXIe-4139 includes user-adjustable overvoltage protection (OVP, up to 25 V) and fixed overcurrent protection (OCP, 1.1 A) to prevent damage to sensitive DUTs like microchips or sensors. During a diode test, for example, if the DUT shorts unexpectedly, the NI PXIe-4139’s OCP triggers within 10 µs to limit current to 1.1 A, avoiding permanent damage. This safety feature is critical for high-volume manufacturing, where DUT failure can disrupt production and increase costs.

Typical application scenarios

In semiconductor component testing, the NI PXIe-4139 is used to characterize power management ICs (PMICs) for mobile devices. A wafer test facility integrates the NI PXIe-4139 into a NI PXIe-1085 chassis, where it sources a 3.3 V input voltage to the PMIC and measures the output current (0–1 A) with 100 pA resolution. The module’s 20-bit accuracy captures small current variations (e.g., 10 µA) that indicate PMIC efficiency, while its synchronization with a NI PXIe-2527 multiplexer enables testing of 32 PMICs per wafer. This setup processes 10 wafers per hour, meeting high-volume production demands and ensuring PMICs meet battery life requirements for smartphones.

In battery R&D, the NI PXIe-4139 characterizes lithium-ion battery cells for electric vehicles (EVs). Engineers use the module to perform charge-discharge cycles: it sources a constant current (0–1 A) to charge the cell to 4.2 V, then measures the discharge current and voltage at 1 kS/s to calculate capacity and energy density. The NI PXIe-4139’s 100 nV voltage resolution detects subtle voltage drops during discharge, providing insights into cell degradation over 1,000+ cycles. Its compatibility with NI Linux Real-Time (on a NI cRIO-9040) enables deployment in environmental chambers (-40 °C to 85 °C), simulating EV operating conditions.

In sensor calibration, the NI PXIe-4139 calibrates current-output sensors like pressure transducers. A calibration lab uses the module to source a known voltage (0–5 V) to the sensor’s excitation input and measure the resulting output current (4–20 mA) with 100 pA resolution. The NI PXIe-4139’s ±0.02% current measurement accuracy ensures compliance with ISO 17025 standards, while its integration with LabVIEW automates calibration reports—reducing manual documentation time by 50% compared to standalone SMUs.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing the NI PXIe-4139, power off the PXIe chassis (e.g., NI PXIe-1085) and wear an ESD wristband (±15 kV) to protect the module’s precision circuitry. Verify the chassis has an empty PXIe slot compatible with x4 lane modules and gather tools: a Phillips screwdriver (for securing the module) and shielded banana jack cables (for DUT connection). Align the NI PXIe-4139 with the chassis guide rails, insert firmly until the PXIe connector seats fully, then secure with the chassis front-panel screw. Connect the banana jack cables to the module’s output terminals and the DUT, ensuring correct polarity (positive to positive, ground to ground) to avoid OVP/OCP triggers.

Commissioning and maintenance: Power on the chassis and host PC, then install the latest NI-SMU driver and LabVIEW. Use NI Measurement & Automation Explorer (MAX) to detect the NI PXIe-4139 and run a “SMU Self-Test” to verify basic functionality (e.g., sourcing 5 V and measuring 100 mA with a known resistor load). Calibrate the NI PXIe-4139 annually using a NIST-traceable calibrator (e.g., NI 9172 with SMU calibration adapter) to maintain ±0.01% sourcing accuracy. Inspect the banana jack terminals and PXIe connector quarterly: clean contacts with isopropyl alcohol (99.9% purity) and a lint-free cloth to remove dust or oxidation. If the NI PXIe-4139 triggers OVP/OCP unexpectedly, check DUT wiring for shorts or update the module’s firmware via MAX—avoid exposing the module to temperatures above 55 °C or humidity above 90% to prevent component degradation.

Service and guarantee commitment

National Instruments (NI) provides a 2-year standard warranty for the NI PXIe-4139, covering defects in materials and workmanship—including the precision sourcing circuitry, measurement ADC, and PXIe interface. For extended protection, the NI ServicePlus Premium Plan extends coverage to 5 years, including annual factory calibration (traceable to NIST) for sourcing/measurement accuracy, priority technical support (2-hour response time for semiconductor/aerospace customers), and expedited repairs (turnaround time < 3 business days with a loaner module for critical downtime).

NI’s global technical team includes SMU specialists, offering 24/7 support for the NI PXIe-4139—assisting with calibration, test sequence optimization, and troubleshooting (e.g., resolving measurement noise in low-current ranges). Customers gain free access to resources: application notes on battery characterization with the NI PXIe-4139, LabVIEW example code for semiconductor testing, and a user community for sharing high-precision SMU best practices. For out-of-warranty repairs, NI’s Precision SMU Restore Service replaces aged components (e.g., precision voltage references, current shunts) and verifies all performance metrics—restoring the NI PXIe-4139 to factory specs. This commitment reflects NI’s confidence in the module’s durability and dedication to supporting users’ critical source-measure needs.