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| Content | New Generation of Secondary Standards Hermetically Sealed Construction Ultra High Precision Z-Foil Technology Resistors with TCR of ± 0.2 ppm/°C, Tolerance of ± 0.001 % and Load Life Stability of ± 0.002 % (Metrology, Laboratory, Instrumentation, Industrial) HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors Document Number: 63120For any questions, contact: foil@vishaypg.comwww.foilresistors.com Revision: 25-Mar-101 INTRODUCTION The Z-Foil based oil filled, hermetically sealed HZ Series resistors represent an industry breakthrough. The hermetic sealing eliminates the ingress of moisture and oxygen, while the oil acts as a thermal conductor, thus eliminating long-term degradation elements of unsealed resistors, while at the same time allowing the device to accept short periods of overload without degradation. The Z-Foil technology provides a significant reduction of the resistive components, sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). When combined with the hermetic sealing and oil filling, the HZ Series resistors become the most precise and stable resistors available. They are used as the most precise secondary standards for ultra precision metrology. With accuracies of ± 0.001 % (10 ppm) and a resistance range from 5 : to 1.1 M: and long term shelf life of less than 2 ppm, these devices are virtually secondary standards that can be carried in sets for daily or periodic calibration of factory measurement equipment. The HZ Series is available with laboratory and metrology level precision and long-term stability with additional in-house oriented processes such as: chip stabilization, special TCR plotting, additional treatments for ultra stability and special post manufacturing operations (PMO). (Please refer to the last page) Note •For maximum TCR < 1 ppm/°C, see VHP100 and contact application engineering FEATURES xTemperature coefficient of resistance (TCR): ± 0.2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.). For ultra high performances (instrumentation and metrology) please refer to the last page xResistance range: 5 : to 1.1 M: (higher or lower values of resistance available) xFoil resistors are not restricted to standard values; specific “as required” values can be supplied at no extra cost or delivery (e.g. 1K2345 vs. 1K) xPower coefficient “ R due to self heating”: 5 ppm at rated power with the Z-Foil technology xTolerance: to ± 0.001 % (10 ppm) xLoad life stability to ± 0.002 % (20 ppm) at 25 °C, 2000 h at rated power xLoad life stability, can be considerably improved through in-house stabilization xShelf life stability: 2 ppm for at least 6 years (unaffected by humidity) xElectrostatic discharge (ESD) up to 25 000 V xPower rating: 0.3 W to 2.5 W at + 25 °C (depending on model - see table 2) xNon-inductive, non-capacitive design xNon hot spot design xRise time: 1 ns effectively no ringing xCurrent noise: 0.010 µVRMS/V of applied voltage (< - 40 dB) xThermal EMF: 0.05 µV/°C typical xVoltage coefficient: < 0.1 ppm/V xThermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) xNon-inductive: < 0.08 µH xTerminal finish available: lead (Pb)-free or tin/lead alloy xImpervious to harmful environments - oil filled xPrototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com xFor better performances (values, TCR, tolerance, stability), please contact us TABLE 1 -TCR VS. RESISTANCE VALUE RESISTANCE VALUE (:) TYPICAL TCR AND MAX. SPREAD (- 55 °C to + 125 °C, + 25 °C ref.) (ppm/°C) 100 to < 1M1± 0.2 ± 2 50 to < 100± 0.2 ± 3 5 to < 50± 0.2 ± 4 FIGURE 1 -SHELF LIFE - VHA518-11 12K9 VS. QHE Time (Days) Resistance Change (ppm) 0 100 200 300 400 500 600 700 800 900 1000 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 - 0.1 |
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| Following Datasheets | h_16w (5 pages) h_k (1 pages) h_s053-1 (3 pages) h_s053 (3 pages) h_s053_assem (4 pages) h_s072-1 (3 pages) h_s072 (3 pages) h_s072_assem (4 pages) h_s103d_r-1 (4 pages) h_s103d_r (4 pages) |
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