Datasheet states "By default, the device is setup to support a 10 kΩ the NTC with a B-value of 3480".
Can you please elaborate where this is specified on a generic NTC specifications by providing an
example datasheet and the parameter in question.
Thanks.
Daniel,
NTC Thermistors are non-linear resistors that alter their resistance characteristics with temperature. Simply put, as temperature increases the thermistor's resistance decreases. The manner in which the resistance of a thermistor decreases is related to a constant known in the thermistor industry as beta (β).
(Thank you Wikipedia)
In a standard data sheet the B Value is always specified. B Value, B-Constant, Beta Value it's all the same for all thermistors.
When TI specifies a B-Constant that means that the IC was designed for this linear slope. Select an NTC with this B-Constant and you will maintain accuracy of the temperature measurement across temperature.
Gordon Varney said:Daniel,
NTC Thermistors are non-linear resistors that alter their resistance characteristics with temperature. Simply put, as temperature increases the thermistor's resistance decreases. The manner in which the resistance of a thermistor decreases is related to a constant known in the thermistor industry as beta (β).
(Thank you Wikipedia)
In a standard data sheet the B Value is always specified. B Value, B-Constant, Beta Value it's all the same for all thermistors.
When TI specifies a B-Constant that means that the IC was designed for this linear slope. Select an NTC with this B-Constant and you will maintain accuracy of the temperature measurement across temperature.
Understood. However, in datasheets or Digikey searches, it is not so straightforward. See the following parametric filter snapshot from Digikey's thermistor catalog:
So, which is the B-Value B0/50, B25/50, B25/75, B25/85, etc?
In a random datasheet (attached), the parameter is listed in a table as B25/100. Is this the correct B-Value?
