NTC
Thermistor Theory
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Circuit
notes for thermistors:
Overview:Circut Notes for
Thermistors:
N.T.C.
Thermistors are
used in a multitude
of diverse customer
applications. The
most common applications
are based on the "zero-power
resistance characteristics" Thermistors
have temperature
coefficients (percentage
change in resistance
per °C), or
alpha values of
the order of -3%/°C
to -6%/°C.
This is a major
advantage of thermistors
over other electronic
temperature sensing
components. Thermistors
have the greatest
temperature sensitivity
of any electronic
sensing component
over their temperature
range of application. For
soldered thermistor
elements with wire
leads (both BetaCURVE
and BetaCHIP) the
range is -80°C
to +150°C.
For Glass Coated
thermistors with
bare leads such
as BetaCHIP, DO-35,
Glass Probes and
Glass Beaded Thermistors
the range extends
from -80°C
to +300°C.
The
successful implementation
of thermistor sensing
applications requires
a certain level
of circuit knowledge
to utilize the
electrical characteristics
of thermistors.
The following section
introduces some
of the circuit
concepts and outline
typical and practical
applications of
thermistors.
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