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www.cadence.com 2 Allegro PSpice Simulator Features Cadence simulation technology for PCB design integrates seamlessly with the Cadence front-to-back PCB design flow, making it possible to have a single, unified design environment for both simulation and PCB design. Design entry and editing Select from a library of more than 33,000 symbols and models for simulation to design with Cadence PCB schematic design entry technology. It provides many features that allow you to easily capture and simulate mixed-signal designs. Seamless integrations include one-button simulation and cross-probing, and many other simulation utilities. Additionally, Allegro PSpice Simulator includes a syntax-aware Spice circuit file text editor. Stimulus creation Access built-in functions that can be described parametrically or draw piecewise linear (PWL) signals freehand with the mouse to create any shape stimulus. Create digital stimuli for signals, clocks, and buses; click-and-drag to introduce and move transitions. Circuit simulation Users can easily set up and run simula- tions, and then cross-probe simulation results from Probe, an industry-standard waveform viewer. Support for multiple simulation profiles enables users to recall and run different simulations on the same schematic. Simulation bias results can be viewed directly on the schematic including node voltages, device power calculations, and pin and subcircuit current. Support for Checkpoint Restart allows designers to reduce simulation times when the same circuit is simulated multiple times with minor changes. Assertions enable designers to detect failure or warning conditions as the simulation progresses. Mixed analog/digital simulation Integrated analog and event-driven digital simulations improve speed without loss of accuracy. A single graphical waveform analyzer displays mixed analog and digital simulation results on the same time axis. Digital functions support five logic levels and 64 strengths, load-dependent delays, and hazard/race checking. Allegro PSpice Simulator also features propagation modeling for digital gates and constraint checking (such as setup and hold timing). Analog analysis Explore circuit behavior using DC, AC,noise, transient, parameter sweeps,Monte Carlo, and DC sensitivity analyses. Allegro PSpice Simulator includes interactive simulation controllers and two simulation solvers. Graphical results and data display Probe Windows allows users to choose from an expanded set of mathematical functions to apply to simulation output variables. Designers can create plot window templates and use them to easily make complex measurements by simply placing markers directly on the desired pins, nets, and parts in the schematic, as well as be able to view a continuous marching waveform as simulation progresses. The tools also enable users to measure performance characteristics of a circuit using built-in measurement functions and creation of custom measurements. For data display, additional capabilities allow plotting of both real and complex functions of circuit voltage, current, and power consumption, including Bodé plots for gain and phase margin and derivatives for small-signal characteristics. (See Figure 2.) Annotate simulation result using floating labels on the circuit voltage, current, and power dissipation at time 0 for a circuit at each node in the schematic. Models Included are a large variety of accurate internal models—which typically include temperature effects—that add flexibility to simulations. Models are available with R, L, C, and bipolar transistors plus: • Modeling apps create a model with user-input parameters (such as from a datasheet) and place a schematic component automatically associated with the newly created model without having to leave the OrCAD Capture canvas. • Built-in IGBTs • Seven MOSFET models, including industry-standard BSIM3v3.2 and the new EKV 2.6 model • Five GaAsFET models, including Parker-Skellern and TriQuint TOM-2, TOM-3 models • Nonlinear magnetic models complete with saturation and hysteresis Analog or mixed-signal simulator with probe graphical post-processor Part Browser Variant Editor DE-HDL Allegro Design Entry HDL Verified netlists Verified BOMs Parts Variant reports for board assembly and BOMs Place part Interface to part data Gerber/NC Drill, GenCAM/GenCAD, pick and place reports Released BOMs Symbols from models, bias info Netlist, stimuli, simulation settings, cross-probing Device equations Allegro PSpice Simulator Model Editor Allegro PSpice Simulator Model Library Measurements Parameters Allegro PSpice Simulator advanced analysis - Smoke analysis - Sensitivity analysis - Optimizer - Monte Carlo analysis BSIM1, BSIM3, EKV models Datasheet specifications Vendor models Part table file MRP/ERP/PDM system PCB layout Fabrication, assembly and test Custom semiconductor models Part Manager Purchasing/ inventory Figure 1: Allegro PSpice Simulator

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