The National Instruments 781743-01, known as the PXIe-4141, is a high-performance 4-channel Source Measure Unit (SMU) specifically designed for applications that demand multiple measurements and high accuracy. This instrument features a 4-quadrant operation combined with integrated remote (4-wire) sensing for each channel, facilitating precise measurements even with complex load configurations. The PXIe-4141 boasts a rapid sample rate which enhances the I-V characterization of devices under test (DUTs), minimizing measurement times and enabling the capture of transient device behaviors. The incorporation of SourceAdapt technology allows for optimal load response tuning, ensuring minimal transient disturbances, while its high-speed sequencing engine affords synchronization with other instrumentation such as switches or rapid digital test modules.

Engineered for a swift transient response, the SMU achieves a settling time of less than 100 microseconds to 0.1% of a voltage step, and recovers within ±20 mV after a load current transition from 10% to 90% of its range. Measurement integrity is further enhanced by a wideband source noise specification of 1.5 mV RMS and less than 20 mV peak-to-peak output noise. The 781743-01 supports current accuracy specifications that account for lead drops, adding only 0.02% of range per volt drop, with a maximum allowable lead drop of 1 V per lead. The unit demonstrates robust performance with load regulation of 20 pA + 10 ppm of range per volt output change, and a 10 μV variation at the connector pins per mA load using local sensing.

Operationally, the 781743-01 is rated for use in ambient temperatures from 0 to 55 degrees Celsius and can be stored in conditions ranging from -40 to 70 degrees Celsius. Adverse conditions are mitigated with a derate of 1.3% per degree Celsius for temperatures exceeding 40°C. Humidity tolerance is specified from 10% to 70% non-condensing for operation and from 5% to 95% for storage. The unit is built to endure altitudes up to 2,000 meters and exhibits resilience to vibrations, rated for non-operating conditions within the range of 5 Hz to 500 Hz at 2.4 g RMS and operating shocks of 30 g with an 11 ms half-sine pulse.

Overall, the National Instruments 781743-01 is a versatile and robust choice for precision measurement and testing, suitable for advanced industrial, research, and development environments.