Datasheet

18
Signal Chain Design Guide
FilterLab® Software
Microchip’s FilterLab software is an innovative software
tool that simplifies analog active filter (using op amps)
design. Available at no cost from the Microchip website
at www.microchip.com/filterlab, the FilterLab design tool
provides full schematic diagrams of the filter circuit with
component values. It also outputs the filter circuit in
SPICE format, which can be used with the macro model to
simulate actual filter performance.
SPICE Macro Models
The SPICE macro models for linear ICs (op amps and
comparators) are available on the Microchip website
at www.microchip.com/spicemodels. The models were
written and tested in PSPICE owned by Orcad (Cadence).
For other simulators, they may require translation. The
models cover a wide aspect of the linear ICs’ electrical
specifications. Not only do the models cover voltage,
current and resistance of the linear ICs, but they also
cover the temperature and noise effects on the behavior of
the linear ICs. The models have not been verified outside
the specification range listed in the linear ICs’ datasheet.
The models’ behavior under these conditions cannot be
guaranteed to match the actual linear ICs’ performance.
Moreover, the models are intended to be an initial design
tool. Bench testing is a very important part of any design
and cannot be replaced with simulations. Also, simulation
results using these macro models need to be validated
by comparing them to the datasheet specifications and
characteristcs curves.
Filter Lab Window
SPICE Macro Model Example
Development Software