Product Core Brief
- Model: PXIe-4145
- Brand: National Instruments (NI)
- Series: PXIe-414x High-Channel-Count SMUs
- Core Function: Provides 4-channel precision source and measure capabilities for high-pin-count semiconductor and IV characterization.
- Product Type: Source Measure Unit (SMU)
- Key Specs: 4 Channels | ±6 V | ±500 mA | 15 pA Sensitivity
- Condition: New Original (New Surplus)
Product Introduction
NI PXIe-4145 is a 4-channel precision Source Measure Unit (SMU) designed for high-density, low-power automated test applications. This module combines the power of a precision power supply, electronic load, and high-resolution multimeter into a single compact PXI Express form factor.
Unlike traditional benchtop SMUs, this module is optimized for parallel IV testing and parametric characterization. It features integrated 4-wire remote sensing to eliminate lead resistance errors and utilizes NI SourceAdapt technology to customize transient responses for optimal stability. It is ideal for MEMS testing, open/short testing, and powering RF integrated circuits.
NI PXIE-4145
Key Technical Specifications
| Parameter | Value |
|---|---|
| Channel Count | 4 Independent SMU Channels |
| Max Voltage Range | ±6 V |
| Max DC Current Range | ±500 mA |
| Current Sensitivity | 15 pA |
| Max DC Source/Sink Power | 3 W per channel |
| Max Sampling Rate | 600 kS/s |
| Remote Sensing | Integrated 4-Wire |
| Transient Response | Customizable (SourceAdapt) |
| Bus Interface | PXI Express |
| Driver Software | NI-DCPower |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: We trace source serial numbers against factory records. Visual inspection checks for PXI Express connector pin damage or PCB scratches.
- Live Functional Test: Power-on self-check runs first. We verify backplane communication and run continuous source/measure load tests >24 hrs with temp logging.
- Electrical Parameter Test: Insulation resistance gets tested at 500 V Megger (>10 MΩ required). Channel-to-channel isolation and ground continuity are mandatory.
- Calibration Verification: Read and record calibration status immediately. Verify offset and gain parameters against factory specs using NI-DCPower.
- Final QC & Packaging: Seal in anti-static bag. Apply QC Passed label with test date and engineer initials.
NI PXIE-4145
Replacement Pitfall Guide
❗ Model Confusion: The PXIe-414x family has multiple variants. Ensure you are not confusing the PXIe-4145 (±6 V, ±500 mA) with the PXIe-4141 (±10 V, ±100 mA) or PXIe-4143 (±24 V, ±150 mA).
❗ Software/Driver Mismatch: This module requires the NI-DCPower driver. Ensure your LabVIEW, TestStand, or Python environment has the correct driver version installed before racking.
❗ Power Budget Exceeded: Calculate total PXI chassis power draw. Each channel can source/sink up to 3 W. Maintain adequate headroom on your PXI power supply to prevent brownouts during multi-channel sweeps.
❗ Sense Line Misconfiguration: For precision measurements, always connect the remote sense (4-wire) lines directly at the DUT. Failure to enable remote sensing in software will result in voltage drop errors.
❗ ESD Damage: Use anti-static mat and wrist strap. Dry environments increase failure risk during handling.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- PXIe-4145 → PXIe-4141 : Needs Adaptation — Lower current (100 mA) but higher voltage (10 V)
- PXIe-4145 → PXIe-4143 : Needs Adaptation — Lower current (150 mA) but higher voltage (24 V)
- PXIe-4145 → PXIe-4135 : Incompatible — Different architecture (System SMU, 200 V, 1 A)
Benchmarks:
- Scan cycle: < 1 ms (600 kS/s sampling rate)
- Comms throughput: PXI Express Backplane Triggering
