Ultra-low Impedance (100 micro ohm and lower) Measurement Using 2-Port Shunt-Through
PDN Measurement for Power Integrity
Measuring ultra-low impedance is a common requirement for assuring power integrity. This means measuring 1 milliohm to 2 milliohm voltage regulator modules (VRMs) and power distribution networks (PDNs).
Today, it is common to see 500 uOhm power rails, however more recently the bleeding edge is below 100 uOhm. Measuring 100 uOhm is a significant challenge, even using the venerable 2-port shunt-thru measurement that has served as the staple of ultra-low impedance measurement.
The dynamic range of the 100 uOhm, 2-port, measurement is 108dB. An impedance dip to 30 uOhm reduces this to 118 dB. Explore below to tackle this fundamental problem.
Products
Bode 500 VNA
Bode 100 VNA
PDN Cable
J2102B Common Mode Transformer
J2113A Semi-Floating Differential Amplifier – Ground Loop Breaker
J2114A High CMRR Isolation Amplifier – Ground Loop Breaker
Articles & Documents
Cadence and Picotest Release NISM on Cadence PSpice
September 26, 2024, Phoenix, AZ: Picotest.com, a leader in high-resolution test and measurement equipment, has announced the availability of the non-invasive stability measurement (‘NISM’)…
Measuring Battery Impedance
Recently, Picotest has had several questions from customers working to measure battery impedance. There are numerous publications and articles about testing battery impedance, even…
PDN Impedance Measurements Using Bode 500 and Picotest PDN Probes
Download or watch the presentation from Florian Hämmerle of OMICRON Lab at this year’s 13th Power Analysis & Design Symposium. The power delivery network…
The Importance of PDN Testing (Impedance) and the Role of the Bode Analyzer
Components such as CPUs, GPUs, FPGAs, and ASICs demand clean and stable power supplies to function effectively, often across various operating conditions. This is…
Ultra-low Impedance Testing Using the 2-Port Shunt-Through Measurement Technique
Ultra-low Impedance Testing Using the 2-Port Shunt-Through Measurement Technique Measuring ultra-low impedances (20 micro-ohm) is a challenge for any power distribution network (PDN) design…
Understanding Power Distribution Networks: Challenges and Tools for Mastering the Design Quest
Modern electronic systems require precise and reliable power delivery, yet designing effective Power Distribution Networks (PDNs) presents significant challenges. Issues such as noise, instability,…
Validating the Validators: Measuring the New Ultra-Low Impedance PDNs
Core power rails are now routinely in the 1 kAmp to 2 kAmp range, requiring a power distribution network (PDN) impedance in the range…
Webinar: Python Automation of Measurement and Multi-Dimensional Plotting of DC and AC Bias Sensitivity of MLCCs
With noted Power Integrity (PI) Expert Istvan Novak Highlights the need for AC and DC bias testing for capacitors and the support Picotest has…
Picotest 2-port Probe Impedance Measurements
Learn how Brian Hostetler from HPE, Inc explains the measurements made on a few different power rails on a printed circuit board (PCB) assembly….
Load Regulation, Vout/Iout, and Output Impedance
Published October 6, 2023 Masashi Nogawa, Sr. Member of Technical Staff, Qorvo In this article, we’re taking a short break from talking about Power…
J2154A PerfectPulse® Revolutionizing Impedance Testing – Features and Unbeatable Benefits of the New Differential TDR
Addressing the need for a low-cost single or differential TDR in a portable package, the J2154A PerfectPulse® Differential TDR emerges as a trailblazing solution,…
Ultra-Ultra-Low Impedance (4 micro-ohm) Measurements
By Benjamin Dannan Published by Signal Integrity Journal, July 26, 2022 Companies like Intel, Nvidia, AMD, Qualcomm, and Broadcom are putting more cores on a…
Make Accurate Impedance Measurements Using a VNA
Three different methods can be applied to accurately measure passive components with a vector network analyzer. By Brian Walker Related To:Copper Mountain Technologies “A…
Calibrating the 2-Port Probe for Low Impedance PDN Measurements
May 18, 2021 Benjamin Dannan and Steve Sandler “High speed printed circuit board (PCB) design requires well-designed power delivery networks (PDN) to support today’s FPGAs or…
App Note: 2-Port Impedance Measurement using the P2102A Probe and E5061B VNA
By Benjamin Dannan and Steven Sandler, Picotest.com High speed Printed Circuit Board (PCB) design requires well designed Power Delivery Networks (PDN) to support today’s…
App Note: 2-Port Impedance Measurement using the P2102A Probe and Bode 100 VNA
By Benjamin Dannan and Steven Sandler, Picotest.com High speed Printed Circuit Board (PCB) design requires well designed Power Delivery Networks (PDN) to support today’s…
NIST Traceable Certification for 10.5GHz TDR in a Flashdrive
We asked a 3rd party calibration lab to provide NIST traceable performance data for our new J2151A PerfectPulse Fast Edge Signal Generator. Their data…
Measuring Sub-milliOhm PDN Impedance
High-speed and portable electronics are still shrinking while power integrity demands continue to require lower power distribution network (PDN) impedance. Measuring sub-milliOhms is difficult. …