TEMPERATURE SENSING QUARTZ CRYSTAL RESONATOR RKT206 - APPLICATIONS RKT206 is a quartz crystal resonator used to sense temperature changes. The crystal is designed for precision electronic thermometers and temperature controllers for conversion of temperature to frequency. FEATURES High shock and vibration characteristics Miniature size Wide temperature range (-50…+100 °C) Low power consumption Suitable for DTCXO and temperature test equipment ELECTRICAL CHARACTERISTICS (at temperature 37 °C) / OPERATING CONDITIONS PARAMETERS Package size SPECIFICATIONS AND REMARKS UNITS DS26 (DT26). Diameter 2 mm / length 6 mm mm Electrical characteristics at temperature 37 °C Frequency range, fO 32.000…36.000 kHz ± 150 ppm 75/95 kΩ 1.3 ± 0.2 pF Frequency Tolerance typ./max., ∆f/fO Resonance resistance typ./max., Rr Static Capacitance typ., CO Capacitance ratio r 870 Drive level max., DL Insulation resistance min. 1.0 500 µW MΩ Motional characteristics Frequency vs. Temperature fT=fO +A1*(T-TO) +A2*(T-TO)2, There: fT – crystal frequency at temperature T (°C), fO – crystal frequency at reference temperature T0 (°C), TO – reference temperature (°C). For higher accuracy fT can be represented by a third order polynomial as follow: fT=fO +A1*(T-TO)+A2*(T-TO)2+A3*(T-TO)3 1st order temperature coefficient A1* -1.811 ± 0.06 K-1 2nd order temperature coefficient A2* -0.0028 ± 0.0001 K-2 -6 K-3 3rd order temperature coefficient A3* 7.6 * 10 Aging first year/10 years max. ± 5 / ± 10 ppm 5 sec -50…+100 / -269…+125 °C -55…+85 °C Drop test 3 times on hard wooden board, height 100cm 5000g., 0.2 ms / ±5 ppm max. ppm 10g / 10-2000 Hz, 8 hours / ±5 PPM max. ppm Thermal time constant in liquid τ Operation conditions Operating temperature, TOPR (typ/max) Storage temperature, TSTR Shock resistance, ∆f/f0 Vibration resistance, ∆f/f0 *A1, A2 and A3 coefficients can be changed on request. PACKAGE DIMENSIONS UNITS: millimeters 5...9 GmbH & Co. KG Wasemweg 5 D-74821 Mosbach Germany page 1(1) 0,7...0,8 0,2dia 2dia 6.1 www.AXTAL.com fon: +49 (6261) 939834 fax: +49 (6261) 939836 E-mail: [email protected]