NTC Thermistor：
：
Application Note
Temperature measurement
The NTC thermistor offers a practical, low-cost solution to most temperature measurement applications. One of the circuits
suitable for temperature measurement is a Wheatstone bridge with an NTC thermistor used as one bridge leg.
Temperature control
The NTC thermistors are the most sensitive of all temperature sensing elements they are popular in temperature control
systems. By using a thermistor in a voltage comparator circuit basic on-off temperature control as well as over-temperature
protection can be incorporated.
Temperature compensation
Many semiconductors and ICs exhibit a temperature coefficient and require temperature compensation to produce stable
performance over a wide temperature range. Owing to their high positive temperature coefficient, NTC thermistors are
particularly suitable for this kind of compensation.
R
T
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
1
www.thinking.com.tw
2008.07
NTC Thermistor：
：
Application Note
Example
2. Temperature Sensor IC
1.
NTC thermistor
(Cost : 50% down)
(Cost : ￥20±0.25)
Driving voltage controlled
by temperature
Voltage vs. temperature
characteristics
NTC thermistor
(K
Driving voltage
Temperature sensor IC
Temperature (℃
℃)
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
2
www.thinking.com.tw
2008.07