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A nalog Technologies

High Stability Miniature Thermistor

SPECIFICATIONS Nominal Resistance @ 25 C: 10K 1% B Value @ 25

ATH10KR8

C /85 C: 3480K 1% B Value @ 0 C /100 C: 3450K 1% B Value @ 25 C /100 C: 3497K 1% Thermistor Diameter: 0.8 0.1mm Thermistor Length: 1.4 0.4mm Lead Diameter: 0.15mm Lead Length: 63 3mm Dissipation Factor: 0.4mW/K Heat Capacity: 1.3mJ/K Maximum Power @ 25 C: 18mW APPLICATION Drill a hole on the object for which the temperature needs to be measured and use thermally conductive epoxy to pot the thermistor inside the hole. The hole diameter should be between 1.2 to 1.4mm and the depth should between 2 to 2.5mm. When a deeper hole is needed, drill a 2 stage hole to prevent mounting epoxy bobbles trapped inside which would cause temperature measurement errors. Figure 2 shows the section view of the 2 stage hole. MAIN FEATURES Glass Encapsulated for Long Term Stability & Reliability High Stability: <0.1 C/Y
Thermal Conductive Epoxy3 – 5 mm Small Size: 0.8mm 1.4mm High Resistance Accuracy: 1% Quick Response Time: 3s Wide Temp. Range: 55 C to 250 C
2 – 2.5 mm APPLICATIONS Temperature sensing for laser diodes, optical components, etc.
1.2 – 1.5 mm DESCRIPTION The ATH10KR8 is a high precision glass encapsulated thermistor. Comparing with conventional epoxy encapsulated thermistors, ATH10KR8 presents higher long term stability and wider temperature range. In addition, it has a small size and short response time. The ATH10KR8 can be used to measure the temperatures for laser diodes, optical components, etc., with high accuracy and long term stability. Figure 1 Side View of ATH10KR8 Figure 2 Section View of the 2 Stage Hole The worst mounting result is that there are air bubbles trapped inside the thermistor mounting hole. These bubbles cause thermal sensing time delay and sensing temperature errors. To avoid the bubbles, use thin epoxy, vibrate the assembly before curing, and cure the epoxy inside the mounting hole at high temperature, 80 C to 150 C,depending on the epoxy used and the maximum temperature assembly components allow. The thermistor lead wires are made of plain copper and there is no insulation coating on them, please make sure that they do not touch each other after mounting the thermistor. Some thermal conductive epoxies are also electrically conductive and such epoxies should not be used for mounting the thermistors, since the lead wires are conductive.
0.8 1.4 ORDERING INFORMATION Part number: ATH10KR8
63 Quantity 1 - 9 10 - 49 50 - 249 250
0.15 Bare copper wire Price $5.8 $4.8 $3.8 $2.4
550 E. Weddell Drive, Suite 4, Sunnyvale, CA 94089, U. S. A. Tel.: (408) 747-9760, Fax: (408) 747-9770, Web: www.analogtechnologies.com Copyrights 2000 – 2008, Analog Technologies, Inc. All Rights Reserved. 1