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What’s New in LTspice 24

> Performance Improvements

•  Faster Simulation Speed and Improved Consistency

•  Default time step control error tolerance (trtol) changed to 2 for better performance in most applications

> UI Changes

•  Shift + Left-Click toggles between comment/directive

•  Default keyboard shortcuts have changed

- Dynamic non-modal cheat sheet available from Help menu

- Classic shortcuts still available via Edit Keyboard Shortcuts > Restore LTspice Classic Values

•  Improved component selection dialog

- Cleaner, more intuitive layout

- New quick links to analog.com product selector, and datasheets

- Bug fixes

• New Configure Analysis toolbar button and shortcut (“a”)

- Tabs are populated with all possible simulation commands on the schematic

- Edits to all tabs are mapped to schematic text

- Schematic text is toggled between comment/directive appropriately

•  New subckt symbol parameter editor dialog

•  Expanded Help menu, including Open Examples

•  Added Tile Windows Vertically toolbar button

•  Settings dialog remembers last tab

•  Command line batch mode (-b) writes to stdout instead of showing GUI

•  Updated Look and Feel

- Icons and cursors have been updated

- Default background has changed

- Screen-resolution awareness & scaling has been fixed

> Waveform Viewer Improvements

•  Rearranged plot panes via right-click > Move up/down, add above/below

•  Added menu items, shortcuts, and buttons to add/clear cursors

- ESC key also now clears all cursors

•  Annotated phase / gain margin via right-click > Notes & Annotations

•  Annotated steps via right-click > Notes & Annotations

•  Numerous bug fixes

- Improved marching waveforms, including cursors and dragging traces

> Frequency Response Analysis (FRA) Enhancements

•  New 4-terminal probe

- Enables analysis of µModules with integrated top feedback resistors

- Simplifies analysis of inverting outputs and current feedback

- Analyze any points in the loop

•  Plot phase margin (phase + 180) instead of phase

•  Smooth stimuli transitions for faster settling / improved accuracy

> Changes to Management of Component Libraries and AppData

•  Faster, cleaner component updates

- Libraries are cleaned up or overwritten on updates

•  Optional user-defined libraries for additional discrete components

- By default, LTspice looks in Documents\LTspice for user.*
 (user.dio, mos, res, cap, ind, bead, jft, bjt)

- Directory is configurable in Settings > Search Paths

•  Users should not edit ADI-provided files in %localappdata%\LTspice

- LTspice will attempt to dissuade users from saving files here

> SPICE Log File Improved and Streamlined

•  Report LTspice version, non-default tolerances, etc.

> Numerous bug fixes