COMMANDSSHORTCUTSSPICE Analysis.OPfind the DC operating point.TRAN

perform nonlinear transient analysis.ACperform small signal AC analysis.DC

perform DC source sweep analysis.TF

find the DC small-signal transfer function.NOISE

perform noise analysis

SPICE Directives

Schematic and Symbol Editing Modes

Place Component Modes*

Choose Mode then select component
Exit mode: Press [Esc] or right-click

Press [Esc] or right-click to exit placecomponent mode[F5]or [Delete]or [Ctrl] X

cut/delete

[F5]

[F6]
or [Ctrl] C

copy/duplicate*[F6][F7]

move*unselected wires remain[F7].BACKANNO

annotate subcircuit pin names on port currents.END

end of netlist

[F8]

drag*
connected wires adjust

[F8]

.ENDS

end of subcircuit definition[Esc]

exit current mode or right-click

[Esc]

.FOUR

compute fourier component.FUNC

user defined functions.FERRET

download a file from URL.GLOBALdeclare global nodes.IC

set initial conditions.INCLUDE

include file

Zoom and Grid
Zoom in and out with scroll wheel
or track pad pinch[Ctrl] Z.LIB

include library.LOADBIAS

load a previously solved DC solution.MACHINE

arbitrary state machine.MEASURE

evaluate user-defined electrical quantities.MODELdefine a SPICE model.NET

compute network parameters in .AC analysis

Schematic
zoom area (drag over area)
zoom in (click on scheme)
Waveformzoom area is default mode
[F9] for previous zoom
Symbolzoom in[Ctrl] B

zoom out[Space]zoom to fit (schematic viewer)[Ctrl] Ezoom extents (waveform viewer)[Ctrl] Gtoggle grid

.NODESET

supply hints for initial DC solution.OPTIONS

set simulator options.PARAMuser-defined parameters

TRICKS.SAVE

limit the quantity of saved data

Waveforms.SAVEBIAS

save operating point to disk

.STEPparameter sweeps.SUBCKT

define a subcircuit.TEMP

temperature sweeps.TEXT

user-defined string.WAVE

write selected nodes to a .WAV file

resistorC

capacitor

CL

inductorLD

diodeDG

groundGV

voltageVS

spice directive
right-click text field to open
“Help me Edit” dialog

SRTtext/commentT[F2]

component

[F2]

[F3]

draw wire

[F3]

[F4]

label net

[F4]bus tap

B*Rotate and Mirror*enabled in place modes[Ctrl] Rrotate#R[Ctrl] Emirror#E

Undo/Redo[Space]### Levels of Undo

[F9]or # Z

undo

[F9]
5 [F9]

5 [F9]

redoor [Ctrl] 5 Z

or # 5 Z

NUMBERS

when clicking waveform label

clickadd cursor and see measureclick[Alt] click

highlight corresponding net in schematic# click

LTspice

Means

Value

LTspice

Means[Ctrl] click

integrate waveform[Ctrl] click

T or ttera

1012

eEuler’s number

G or ggiga

109piπmegmega106kBoltzmann constant

K or kkilo

103

qcharge constant

M or mmilli

10−3true

1

U or umicro

10−6false

0

nano

10−9

mil

25.4×10−6m

P or p

pico

10−12

F or f

femto

10−15

Schematics

component: plot instantaneous power
wire: plot current# click

hold [Ctrl]

draw wires at an angle

hold [Shift][Ctrl] [Alt] [Shift]Hshow hidden component values/text,
e.g. parallel or series resistance andcapacitance[Alt] click

Fast • Free • UnlimitedR

any text preceded by an underscore, e.g. “_FAULT” is displayed with anoverbar, active low, signal

Prefixes (Case Insensitive)

N or nConstants©2022 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of theirrespective owners. Ahead of What’s Possible is a trademark of Analog Devices. LTspice-4/22(A) analog.com