Fast and Practical Power Integrity (PI) and Electromagnetic Interference (EMI) Analysis
CR-5000 Lightning Power Integrity Advance
Power Integrity Advance provides fast and practical power integrity (PI) and electromagnetic interference (EMI) analysis embedded within CR-5000 Lightning, during PCB layout, within your real-time PCB design flow.
Fast signaling and multiple supply voltages are commonplace. Examples include USB 2/3, DDR3 and many kinds of signaling used by field programmable gate arrays (FPGAs). With design features like these, careful design of PCB power distribution is essential.
EMI plus AC and DC power analysis are combined in a single environment. AC analysis assists decoupling capacitor selection and verifies detailed plane impedance. DC analysis identifies unintended design features that lower supply voltages below specification when they reach ICs.
AC power analysis checks frequency-dependent power/ground impedance to make sure impedance at a device is low at key frequencies such as a clock frequency and its harmonics. High impedance may require corrective action such as decoupling or reshaping of a power or ground plane.
DC power analysis automatically creates an equivalent DC circuit representing power distribution. This circuit is combined with knowledge of device power consumption and other datasheet items to check DC voltage drops and current flow. Common problems that can be avoided by DC analysis include dense grouping of via holes causing increased local resistance.
EMI analysis highlights design features that cause electromagnetic emission hotspots, considering both Common Mode and Differential Mode radiation. Solid, research-based algorithms, developed by Zuken in collaboration with the EMC Expert System Consortium at the Missouri University of Science and Technology, ensure fast and meaningful results that assist reliable PCB design in the real world.
We extensively use CR-5000 Lightning Power Integrity Advance in our designs to support our 'right first time' design process. It helps us to identify problems at the earliest stages, eliminating design re-spins and reducing our overall development costs.
Jeff Williams, design manager, e5D