SpikeSafe Source Measure Unit

A pulsed source measure unit built for power and precision for unmatched accuracy and repeatability

Like SpikeSafe Performance Series current sources, critical components in high-performance test solutions for leading manufacturers and labs worldwide, SpikeSafe SMUs include industry-leading SpikeSafe® protections that protect the instrument and devices under test. With SpikeSafe SMU, improve your measurements with precision and accuracy and reduce your cost of test.

The SpikeSafe SMU

SpikeSafe SMU is a precision pulsed source measure unit that precisely sources pulsed current and simultaneously digitizes voltage. Optimized for precise and repeatable high-power LED and laser testing, SpikeSafe SMU (Source Measure Unit) current sources deliver precise pulsing with low microsecond rise times, low-jitter triggering and integrated digitizer for more accurate and repeatable high-power LED and laser testing. Pair SpikeSafe Source Measure Unit with Vektrex’s Control Panel software application to quickly and easily sweep and generate IV curves.

SpikeSafe SMUs feature test-specific current output modes including DC and continuous or single pulse modes. Minimum pulse widths as low as 1us reduce junction temperatures for VCSEL, laser diode and other semiconductor devices. With sustained output power and no duty cycle limitations, SpikeSafe SMUs can power a broad range of applications.

Test what you couldn’t see

With more and more high-power density LED and laser devices coming to market, there’s a gap between what can tested with traditional source measure units and present engineering and production testing needs. Inadequate power, pulsing and measurement capabilities limit previous generation source measure units.

SpikeSafe® SMU precision pulsed source measure units close that gap by providing accurate pulsing from hundreds of seconds down to 1us with sustained output power. SpikeSafe SMU brings together the speed and power needed for LED and laser testing with integrated high-speed digitizing measurement. Now you can accurately test what you previously couldn’t test, and see what you didn’t have the power to see – with remarkable repeatability.

Introducing “crazy stable” measurements

SpikeSafe SMUs provide the power needed for more accurate, efficient and repeatable measurements.

The SpikeSafe SMU features submicrosecond to low microsecond rise/fall times, programmable load tuning and on-the-fly pulse width correction. Together these mean the device under test experiences less heating and more uniform heating. The result is unmatched measurement stability – measurements described by one beta site evaluator as “crazy stable”.

One and done measurements. No averaging required.
One and done measurements. No averaging required.

Precision timing with a low-noise integrated digitizer eliminates the need to average multiple measurements.

With measurement stability, multiple measurements and averaging is not required speeding test. With measurement stability, false positives and false negatives are eliminated, improving yield and reducing the cost of test.

The high power current source of choice – now in two sizes

High power SpikeSafe Source Measure Units
High power SpikeSafe Source Measure Units

SpikeSafe SMUs feature Continuous Power Conversion (CPC). CPC digitally transfers power from available AC or DC sources to the SMU’s pulsing circuity. Since the transfer is continuous, the SMU has no pulse width limitations. The half-width models provide 600W of continuous output power and the full width models can provide up to 6400W. This capability, along with the SMU’s fast pulsing capability, means SpikeSafe Source Measure Unit’s have the flexibility to support DC, continuous pulse and single pulse current testing for the devices of today and tomorrow. 

Easy-to-Use Control Panel Software Application

Control Panel and Performance Series Current Source
Control Panel and Performance Series Current Source

Vektrex’s easy-to-use Control Panel Software Application provides turn-key control of the SMU along with external source-measure units, high-speed sampling voltmeters and spectrometers. Control Panel’s intuitive test tools and graphic displays support common optoelectronic tests such as LI sweeps, slope efficiency testing and junction temperature measurement.



500mA  4A  5A  10A