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NTC Thermistor Application Guide

From The Inter-Technical Group, Inc. (ITG)
 

 
APPLICATION 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. Inrush current suppressing Circuits including a capacitor, filament for a bulb, inverter for fluorescent lamp, a heater and etc., induce an inrush current more than 100 times the normal current when the circuit switch is turned on. The NTC thermistors specially developed for this application limit the current at turn-on by their relatively high cold resistance. During continuous operation, the NTC thermistors heats up and its resistance remains negligibly low.
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Product Announcements
Canadian Thermostats & Control Devices LTD. - CANTHERM NTC THERMISTORS IN STOCK AT DIGI-KEY
Digi-Key Corp. has increased their stock of Cantherm's NTC thermistors to include SMT thermistors on tape & reel, and glass encapsulated and thermistor probes. This is in addition to their already... (read more)
RTI Electronics, Inc. - ACCU-CURVE™ Thermistors
RTI manufactures precision resistance-temperature matched ACCU-CURVE™ thermistors. These devices offer interchangeability over a broad temperature range and eliminate the need to individually... (read more)
Cornerstone Sensors, Inc. - Leaded NTC Thermistors
Leaded NTC thermistors are some of the most versatile temperature sensors available to the design engineer. These products are offered in many different lead configurations, uninsulated or insulated,... (read more)
Canadian Thermostats & Control Devices LTD. - CANTHERM'S MF52 AND MF58 HAVE UL1434 LISTING
Cantherm is proud to announce that the UL file has recently been revised to include a wider range of the MF52A and MF58 product lines. Now listed to UL1434 and ISO EN60730-1 the entire produt line... (read more)
RTI Electronics, Inc. - NTC Disc & Chip Style Thermistors
RTI manufactures DISC & CHIP style thermistors in resistance values ranging from 1.0 ohm to 500,000 ohms. These devices are suitable for a range of resistance values and temperature coefficients... (read more)
Cornerstone Sensors, Inc. - Uninsulated Lead, High Temperature Thermistors
Because of its unique metalization technology [patent/patents pending] and superior thermistor processing technology, the Cornerstone Sensors, Inc. T150 Series NTC thermistor is a lower cost... (read more)
Cornerstone Sensors, Inc. - T020 Series NTC Thermistor, Thick film gold
The T020 Series leadless chip NTC thermistors have top and bottom surface gold contacts. The fired-on thick film gold contacts are for suitable for die mounting with conductive epoxy or low... (read more)
Canadian Thermostats & Control Devices LTD. - MF72 THERMISTORS HAVE UL LISTING
INRUSH CURRENT LIMITORS The MF72 series Inrush Current Limitors provide current suppression for sensitive electronics. Connecting a MF72 in series with the power source will limit the current surges... (read more)
Topics of Interest
There is a variety of temperature sensors on the market all of which meet specific application needs. The most common sensors that are used to solve these application problems include the... (Read More)
Thermistor can be classified into 2 category, PTC thermistor and NTC thermistor, according to its resistance-temperature characteristics. PTC, abbreviation of Positive Temperature Coefficient. NTC,... (Read More)
This application note shows two circuits that use a precise, negative temperature coefficient (NTC) thermistor for temperature measurement. The thermistor is placed in a resistive divider to linearize... (Read More)
Like the RTD, the thermistor is also a temperature-sensitive resistor. The name thermistors is derived from the term “thermally sensitive resistors,” since the resistance of the... (Read More)
This application note shows two designs that use a precise, negative temperature coefficient (NTC) thermistor for temperature measurement. The thermistor is placed in a resistive divider to linearize... (Read More)
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