LTspice
Free SPICE simulator from Analog Devices with schematic capture and a waveform viewer for simulating analog circuits.
What it does and how it connects
LTspice is a free SPICE simulator from Analog Devices with schematic capture and a waveform viewer for simulating analog circuits. Its graphical schematic capture interface lets the user probe schematics and explore simulation results in the built-in waveform viewer.
Analog Devices describes LTspice as fast, free, and unlimited, with enhancements and models for improving the simulation of analog circuits compared with other SPICE solutions. The page links a library of macromodels and demo circuits for Analog Devices products, tutorials, and the LTspice forum on EngineerZone.
Several Analog design tools export LTspice schematics, including Signal Chain Designer, the Analog Filter Wizard, the Photodiode Wizard, the Precision ADC Driver Tool, and LTpowerCAD, so a design started in those wizards can be verified further in LTspice.
Alternatives
Compare side by side- ngspice
ngspice is the open-source SPICE simulator driven by netlists and the command line, with no schematic entry of its own.
- KiCad
KiCad is a free, open-source electronics design suite with a schematic editor, PCB layout editor, integrated SPICE simulation, and a 3D viewer.
- Proteus
Proteus is a design suite from Labcenter that combines schematic capture and PCB layout with circuit and microcontroller simulation.
- Cadence OrCAD/Allegro
OrCAD X includes built-in PSpice analog and mixed-signal circuit simulation inside the schematic and layout environment.
Sources
Not verified
- Real user voices: no real linked post read for this page.
- Related Error Index entries: no entry with software LTspice was verified.
- Repo stats: no public repo verified for this commercial product.
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.