DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 8
Technical content
Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@analogti.com 2 Analog Technologies ATTP1A Temperature Plate Assembly MAIN FEATURES Large platform for thermal load: 66mm × 44mm Wide temperature regulation range: –20°C to 110°C Accurate temperature stability: 1.8mV Response to large set-point temperature change: 20s from 10 °C to 20°C Response to small set-point temperature change: 6s from 20°C to 21°C High thermal load capability: 15.75W
APPLICATIONS
It's widely used for evaluating TEC controllers, TECs and heat sink, etc. Also, it can st abilize an object’s temperature for scientific experiments.
DESCRIPTION
ATTP1A is designed for evaluating TEC controllers, which can be easily evaluated by using this temperature plate. ATTP1A aims to automatica lly adjust the temperature parameters based on the requested temperature range so that the TEC controller can de tect the pre-set temperature range. Temperature plate ATTP1A works together with TEC controller evaluation board and TEC controller. Figure 2 shows the physical photo of ATTP1A. The TEC evaluation board connects with ATTP1A through CON1. On the right side of ATTP1A, it connects with a TEC module, a thermistor, a fan and a heat si nk, see Figure 1. R1 (W11, W12, R1A), R2 (W21, W22, R2A), R3 (W31, W32, R3A) are TEC temperature control parameters, see Figure 2. Required temperature parameters can be achieved through adjusting R1, R2 and R3, thus the TEC controller can detect the temperature range that users require. In different temperature ranges, R1, R2 and R3 have different corresponding resistan ces. R1, R2 and R3 can be determined by: MIDHIGHLOW HIGHLOWHIGHLOWMID MID RRR RRRRRRR *2 **2)(1 −+ −++= MIDRRR −= 12 MIDLOW MIDLOW RR RRRRR − −+= )1(13 Where R HIGH is the resistance of R TH in the highest temperature of the set temperature range; R MID is the resistance of R TH in the medium temperature of the set temperature range; R LOW is the resistance of R TH in the lowest temperature of the set temperature range. For example, set the highest temp erature 35°C and the lowest temperature 15°C, so the medium value is 25°C. In the R-T table, R HIGH, R MID and R LOW can be achieved, see Table 2. RHIGH = 6.5k; RMID = 10k; RLOW = 15.7k In accordance with the above three formulas, R1, R2 and R3 can be calculated: As shown in Figure 4, R1 is equal to the sum of W11 (potentiometer), W12 (poten tiometer) and R1A (fixed value resistor), that is, R1=W11+W12+R1A. So simply adjust W11 and W12, R1 w ill be 8.051k. W11 provides coarse adjustment and W12 provides fine adjustment. The same goes to R2 and R3, that is: R2=W21+W22+R2A R3=W32+W33+R3A Where W21 and W31 provide coarse tuning; W22 and W32 provide fine tuning. At the bottom right side of the plate, there are three switches S1, S2, and S3, which can be used to adjust the temperature parameters. When adjusting R1, R2 and R3, disconnect them with circuit (turn corresponding switch to OUT), thus the measured R1, R2 and R3 are available. When R1, R2 and R3 are all adjusted to the required resistance, turn on all switches (switch to IN). Solder pad TP11 and TP12 are test points of R1. When the switch is off, use resistance function of the multimeter and connect its two test leads to TP11 and TP12. At this time, adjust W11 and W12, the resistance of R1 can be read in the meter. Users can tune R1 on the basis of calculated temperature parameters and get the required resistance from the multimeter. This method is also applied to R2 and R3. TP21 and TP22 can be used to test R2; TP31 and TP32 can be used to test R3. There are solder joints on the sides of the board. These solder joints can be used to connect with external devices or components. Test lines of other devices can be placed into the holes of solder pads directly. Note: It’s recommended to set a narrow temperature range, such as 20°C to 30°C; otherwise, the relationship between the TEMP and the actual temperature is not linear.
Figure 3. Locations of Potentiometers and Switches Table 1. Characteristics
Table 2. Resistance vs. Temperature Characteristics for Thermistor ATH10K1R25
Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@analogti.com 8 Analog Technologies ATTP1A Temperature Plate Assembly 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 informatio n to verify, before placing orders, that information being relied on is current and complete. 2. 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 informatio n to verify, before placing orders, that information being relied on is current and complete. 3. All products are sold subject to the te rms and conditions of sale supplied at th e 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. 4. Customers are responsible for their applications using ATI co mponents. 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. 5. ATI does not warrant or represent that any license, either expressed or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of ATI co vering 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. 6. IP (Intellectual Property) Ownership: ATI retains the owners hip of full rights for special technologies and/or techniques embedded in its products, the designs for mechanics, optics, pl us all modifications, improvements, and inventions made by ATI for its products and/or projects.