On-Die Power Rail Measurements: Setup and Best Practices
Accurate on-die power rail measurements depend on proper sense-line design, differential probing, and careful test setup at the package level.
Guidance on selecting, configuring, and using probes for accurate high-fidelity measurements. Covers probe loading, bandwidth considerations, grounding techniques, and common measurement mistakes.
Understanding the internal design of a 10x passive probe reveals the trade-offs that affect signal accuracy, bandwidth, and noise performance.
Knowing a probe’s dynamic range, differential limits, and common-mode voltage helps ensure safe and accurate measurements in high-voltage circuits.
Attaching multiple probes to the same test point can cause probe loading and interference, leading to inaccurate oscilloscope measurements and distorted waveforms.
CAT ratings define measurement safety based on source impedance and location—not probe performance or measurement accuracy.
Ground-referenced passive probes can create dangerous short circuits in high-voltage power systems—use properly rated differential probes instead.
Wide-bandgap power devices demand high bandwidth and superior CMRR, making probe selection critical for accurate high-voltage upper-side measurements.
While built-in isolated inputs offer convenience and safety, high-quality isolated probes deliver superior noise immunity and performance in fast-switching, high-voltage environments.
These nine practical DDR probing tips help reduce strain, improve signal integrity, and avoid common measurement pitfalls when working with high-speed DRAM interfaces.
A simple in-circuit test reveals how a differential probe’s CMRR behaves across frequencies and how closely it matches published specifications in real measurement environments.
What if we remove the probes from the equation by connecting our DUT's output directly to the oscilloscope's analog input using a 3-ft. 50-Ω coaxial cable?