DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 6
Technical content
Copyrights 2000-2021, Analog Technologies, Inc. All Rights Reserved. Updated on 3/31/2021 Email: staff@analogti.com/sales@analogti.com 3 Analog Technologies ATH1R38M0.1%200CL5R3 High Accuracy Miniature Thermistor As shown in Figure 5, the steepest position of the ATH1R38M0.1%200CL5R3 curve is at colder temperatures. The temperature coefficient is one method that can be used for comparing the relative steepness of the curves. It is highly recommended to compare the temperature coefficient at the same temperature because α varies widely over the operating temperature range. Resistance Ratio (Slope) The resistance ratio, or slope, for thermistors is defined as the ratio of the resistance at one temperature to the resistance at a higher temperature. As with resistance ratios, this method will vary depending on the temperatures used for calculating the value. This method can also be used to compare the relative steepness of two curves. There is no industry standard for the two temperatures that are used to calculate the ratio, we can select two common temperatures from the table below, for example, 25 C and 50 C, then the result of this calculation: R@25C / R@50C, will be: And this calculation: R@25C/R@85C, will be: Steinhart-Hart Thermistor Equation The Steinhart -Hart Equation is an empirically derived polynomial formula which does best in describing the relationship between the resistance and the temperature of ATH1R38M0.1%200CL5R3, which is much more accurate than β mathod. To solve for temperature when resistance is known, yields the following equation: 3)(ln)(ln/1 RCRbaT ; Where: T = temperature in K (Kelvin), a, b and c are equation constants, R = resistance in Ω at temp T; To solve for resistance when the temperature is known, the form of the equation is: 27 2 2 227 2 2 xxxx R Where: c Tax /1 , c b . The a, b and c constants can be calculated for either a thermistor material or for individual values of the thermistors within a material type. To solve for the constants, three sets of data must be used. Normally, for a temperature range, the low end, middle end and high end values are used to calculate the constants, resulting in the best fit for the equation over the range. Using the Steinhart-Hart equation allows for accuracy as good as ±0.001ºC over a 100ºC temperature span. e
Copyrights 2000-2021, Analog Technologies, Inc. All Rights Reserved. Updated on 3/31/2021 Email: staff@analogti.com/sales@analogti.com 4 Analog Technologies ATH1R80M0.1%200CL5R3 High Accuracy Miniature Thermistor Resistance Temperature Characteristics Temp Resistance Temp Resistance Temp Resistance Temp Resistance Temp Resistance ºC K Ω ºC K Ω ºC K Ω ºC K Ω ºC K Ω
Copyrights 2000-2021, Analog Technologies, Inc. All Rights Reserved. Updated on 3/31/2021 Email: staff@analogti.com/sales@analogti.com 5 Analog Technologies ATH1R80M0.1%200CL5R3 High Accuracy Miniature Thermistor NAMING A TH 1R38M 0.1% 200C L5R3 T70 S ORDERING INFORMATIONS Quantity 1 – 9 10 – 49 50 – 199 200 – 499 500 CUSTOMIZATION: We can customize the thermistor with different resistance and temperature errors: A. The maximum resistance error is 0.1% when the object temperature is reached. B. The most accurate temperature error is ±0.2C when the object resistance is reached. Please specify the requirements when you need a customized high stability thermistor. Temp Resistance Temp Resistance Temp Resistance Temp Resistance Temp Resistance C KΩ C KΩ C KΩ C KΩ C KΩ 249 1.493 272 0.9984 295 0.6897 318 0.4905 250 1.466 273 0.9818 296 0.6792 319 0.4836 251 1.440 274 0.9656 297 0.6689 320 0.4768 252 1.414 275 0.9497 298 0.6587 321 0.4701 Sealed Tubing and its length Company code: Analog Technologies, Inc. Nominal Resistance @ 25C Length Accuracy Temperature at test point Thermistor
Copyrights 2000-2021, Analog Technologies, Inc. All Rights Reserved. Updated on 3/31/2021 Email: staff@analogti.com/sales@analogti.com 6 Analog Technologies ATH1R80M0.1%200CL5R3 High Accuracy Miniature Thermistor NOTICE 1. ATI reserves the right to make changes to its products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 2. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. Testing and other quality control techniques are utilized to the extent ATI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. 3. Customers are responsible for their applications using ATI components. In order to minimize risks associated with the customers’ applications, adequate design and operating safeguards must be provided by the customers to minimize inherent or procedural hazards. ATI assumes no liability for applications assistance or customer product design. 4. ATI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of ATI covering or relating to any combination, machine, or process in which such products or services might be or are used. ATI’s publication of information regarding any third party’s products or services does not constitute ATI’s approval, warranty or endorsement thereof. 5. IP (Intellectual Property) Ownership: ATI retains the ownership of full rights for special technologies and/or techniques embedded in its products, the designs for mechanics, optics, plus all modifications, improvements, and inventions made by ATI for its products and/or projects.