User`s guide
1
-
2 Thin
g
s You Need to Know
What is PSpice A/D?
MicroSim PSpice A/D is a simulation program that models the
behavior of a circuit containing any mix of analog and digital
devices. Used with MicroSim Schematics for design entry, you
can think of PSpice A/D as a software-based breadboard of your
circuit that you can use to test and refine your design before ever
touching a piece of hardware.
Run basic and advanced anal
y
ses
PSpice A/D can
perform:
• DC, AC, and transient analyses, so you can test the response
of your circuit to different inputs.
• Parametric, Monte Carlo, and sensitivity/worst-case
analyses, so you can see how your circuit’s behavior varies
with changing component values.
• Digital worst-case timing analysis to help you find timing
problems that occur with only certain combinations of slow
and fast signal transmissions.
Use parts from MicroSim’s extensive set of
libraries
The model libraries feature over 10,200 analog
and 1,600 digital models of parts made in North America, Japan,
and Europe.
Var
y
device characteristics without creatin
g
new parts
PSpice A/D has numerous built-in models with
parameters that you can tweak for a given device. These include
independent temperature effects.
Model behavior
PSpice A/D supports analog and digital
behavioral modeling so you can describe functional blocks of
circuitry using mathematical expressions and functions.
Because the analo
g
and di
g
ital
simulation al
g
orithms are built
into the same pro
g
ram, PSpice
A/D simulates mixed-si
g
nal
circuits with no performance
de
g
radation because of ti
g
htly
coupled feedback loops between
the analo
g
and di
g
ital sections.
The ran
g
e of models built into
PSpice A/D include not only
those for resistors, inductors,
capacitors, and bipolar
transistors, but also these:
• transmission line models,
includin
g
delay, reflection,
loss, dispersion, and
crosstalk
• nonlinear ma
g
netic core
models, includin
g
saturation
and hysteresis
• six MOSFET models,
includin
g
BSIM3 version 3
• five GaAsFET models,
includin
g
Parker-Skellern and
TriQuint’s TOM2 model
• IGBTs
• di
g
ital components with
analo
g
I/O models