![]() Because SourceAdapt gives you direct access to the digital control loop of the SMU, you can optimize the SMU response for any load, even a 2,500 uF capacitor, as in the figure below. However, when operating in high-capacitance mode, the rise time of the SMU is dramatically throttled and the load capacitance is often still limited to 50 uF. Traditional SMUs that use fixed, analog control loops can switch from “normal” to “high-capacitance” mode to prevent the SMU from becoming unstable. This feature is critical for powering highly capacitive loads without damaging the DUT or instrument. Additionally, minimum rise and fall times help you achieve the fastest possible test times. Removing overshoots helps protect the DUT while eliminating oscillations that are critical for system stability. NI SMUs are equipped with a digital control loop technology called SourceAdapt, which gives you the ability to customize the control loop of the SMU and create the optimum step response for any given load-even highly capacitive or inductive loads. Testing in the extended pulse boundary gives you the ability to not only operate the SMU outside of its normal IV boundary, but also minimizes the amount of heat dissipated through the device under test (DUT) and reduces the need for thermal management infrastructure. These SMUs can generate pulses up to 500 W, which gives you a way to quickly test the IV characteristics of high-power devices without cascading multiple SMUs. This opens up a variety of applications for SMUs that previously required external instruments such as oscilloscopes, function generators, or highly specialized power supplies. Additionally, they expand on traditional SMU functionality by incorporating a fast sampling rate, a fast update rate, and NI technology for customizing the SMU response. The broad power boundary and high-precision specs of NI system SMUs allow you to address a majority of DC test requirements using a single instrument. With the modularity and compact size, you can integrate a small number of SMU channels into mixed-signal automated test applications, or build high-density semiconductor test systems with up to 17 SMU channels in a single 4U PXI chassis. ![]() Precision IV and low-frequency capacitance measurements on the same pin, such as microelectromechanical system (MEMs) devices.Precision measurements along with high-power pulse sweeps such as power transistors and high-brightness LEDs.A fast transient response such as RF power amplifiers.A high-power source and sink with high-speed sampling capability such as power management ICs (PMICs).High voltage/current sequence generatorĬombining this functionality into a single instrument makes them ideal for testing a broad range of devices, including those that require:.Isolated high voltage/current digitizer.This combination gives these instruments the ability to perform functions beyond traditional SMUs and turns it into a multipurpose instrument you can use as a: This not only simplifies connectivity, but also reduces the number of different instruments, the test system footprint, and overall cost.Īn NI system SMU combines the power and precision of a traditional box SMU with NI technology that makes it faster, more flexible, and more compact. This gives you the versatility to perform many different functions and test a broad range of devices on the same pin. Alternatively, system SMUs combine high-power, high-precision, and high-speed source measure capability into a single instrument. While these instruments are ideal for serving a specific function, you may need multiple SMUs to fully characterize devices that require a variety of different stimulus or functionality. This functionality makes SMUs ideal for a broad range of applications from providing high-precision DC power to characterizing semiconductor components such as discrete components or ICs.Ĭertain SMUs are optimized for a specific application or requirement, such as leakage testing, high-power IV sweeps, or powering mobile devices with a fast transient response. Source measure units (SMUs) are precision instruments that you can use to simultaneously source and measure both current and voltage on the same channel.
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