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Source Measure Units

Compare XMU Source Measure Units

Source Measure Units (SMUs) combine programmable sourcing and measurement in PXIe modules for device characterization. Choose between the four-channel XMU5201A and XMU5201B for precision parallel characterization, or the 32-channel XMU5238 for synchronized high-density workflows.

Match the required source and measurement envelope, compliance limits, channel count, timing, fixture, software interface, and acceptance evidence to the selected model.

Source Measure Units product list

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XMU Model Comparison

Use the model pages and current datasheets for the released configuration limits and conditions.

Format Model Coverage Best fit
3U PXIe, 4 HP XMU5201A 4 channels; +/-24 V; +/-150 mA; 600 kS/s; 10 pA current resolution Four-channel low-current characterization requiring the highest precision among these models
3U PXIe, 4 HP XMU5201B 4 channels; +/-24 V; +/-150 mA; 600 kS/s; 100 pA current resolution Four-channel automated device characterization where 100 pA current resolution is sufficient
3U PXIe, 78-pin D-Sub XMU5238 32 channels; +/-15 V; +/-32 mA; 1 MS/s; 80 pA current resolution Synchronized high-density semiconductor, sensor, LED/LD, and battery characterization

Frequently Asked Questions

When should XMU5201A or XMU5201B be chosen over XMU5238?
Choose XMU5201A or XMU5201B when four channels, +/-24 V and +/-150 mA ranges, and 10 pA or 100 pA current resolution fit the DUT. Choose the 32-channel XMU5238 when synchronized channel density is the primary requirement and its +/-15 V and +/-32 mA operating envelope fits the test.
What acceptance checks should be run for low-current SMU work?
Run open and short checks, guarded fixture checks, cable leakage review, reference-device measurement, repeatability checks, compliance behavior tests, and exported-data review. Low-current performance should be accepted as a complete measurement setup, not as an isolated instrument claim.
What information should be sent with an SMU enquiry?
Send DUT type, required source ranges, expected measured current, compliance limits, pulse or sweep timing, number of biased terminals, fixture or probe station details, cabling type, software interface, and the required data/report format.
Why does compliance behavior matter?
Compliance protects the DUT when the device enters a low-impedance, breakdown, or fault state. The acceptance test should prove the configured voltage or current limit, the trip response, and the data recorded when the limit is reached.
When is guarding mandatory?
Guarding becomes mandatory when leakage through cables, fixtures, probe cards, or contamination can approach the measured current. For ultra-low-current work, the fixture and cabling are part of the measurement system.

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Selection Guides

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