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VHP100 Datasheet(PDF) 1 Page - Vishay Siliconix |
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VHP100 Datasheet(HTML) 1 Page - Vishay Siliconix |
1 / 4 page VHP100 Vishay Foil Resistors Document Number: 63003 For any questions, contact: foil@vishay.com www.vishay.com Revision: 18-Jun-07 1 Ultra-High Precision Hermetically Sealed Bulk Metal® Foil Technology Resistor with Zero TCR and 0.005 % Tolerance Any value available within resistance range Vishay has achieved an essentially zero temperature coefficient resistor in the VHP100 family. This oil filled hermetically sealed device makes unique use of foil on ceramic in such a way that self cancelling responses to temperature are produced by combining equal and opposite effects. This product is sold only in hermetic packages because applications requiring this level of temperature stability require humidity stability as well. The value of the hermetic enclosure over the molded part is in the long term performance. The hermetic sealing prevents the ingress of moisture and oxygen, while the oil acts as a thermal conductor. WINDOW DEFINITION The TCR of the VHP100 is so small that an additional definition - window, has been introduced. The window definition requires that the absolute resistance remain within the stated window over the temperature range specified. The resistance of the VHP100 resistor stays within a 60 ppm window over the entire military temperature range of - 55 °C to + 125 °C (Figures 1 and 3). A window of 10 ppm is available for the laboratory instrument range (+ 15 °C to + 45 °C); see Figure 4 - type VHP101. TRACKING Tracking of the VHP100 resistor is also vastly superior to conventional precision resistors. Typical ± 5 ppm/°C precision resistors have a worst-case tracking of 10 ppm/°C (wirewounds) or a difference between resistors of 1000 ppm (10 ppm/°C x 100 °C) when temperature changes from + 25 °C to + 125 °C. For a 3 ppm/°C tracking (Vishay S102C) the difference will be 300 ppm (3 ppm/°C x 100 °C) for the same temperature range. The VHP100 resistors will track to 60 ppm from - 55 °C to + 125 °C, a five-fold improvement over the S102C resistor. FEATURES • Essentially Zero TCR: almost zero resistance/ temperature effect • Absolute Resistance Change (window): VHP100 < 60 ppm (- 55 °C to + 125 °C) VHP101 < 10 ppm (+ 15 °C to + 45 °C) • Tolerance: to ± 0.005 % • No Humidity Effect: Hermetically Sealed1) against Moisture • Load Life Stability2): ± 20 ppm typical for 2000 hours, 70 °C at 0.3 Watts • Shelf Life Stability: ± 2 ppm after at least 10 years • Resistance Range: 100 Ω to 150 kΩ (other values available on request) • Electrostatic Discharge (ESD) above 25 000 Volts • Non Inductive, Non Capacitive Design • Current Noise: < - 40 dB • Thermal EMF: 0.05 µV/°C • Voltage Coefficient: < 0.1 ppm/V • Inductance: < 0.08 µH • Non Hot Spot Design • Hermeticity: 10-7 atmospheric cc/seconds max • Terminal Finishes available: Lead (Pb)-free Tin/Lead Alloy Notes 1. Oil filled as standard. Air filled available upon request. 2. Load-life stability can be considerably improved through in-house oriented tests. * Pb containing terminations are not RoHS compliant, exemptions may apply FIGURE 1 - A TYPICAL VHP100 RESISTANCE TEMPERATURE CURVE FIGURE 2 - POWER DERATING CURVE Available Pb-free RoHS* COMPLIANT 60 ppm Window - 55 - 25 0 + 25 + 50 + 75 + 100 + 125 Temperature (°C) + 100 % + 75 % + 50 % + 25 % 0 - 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 Ambient Temperature ( °C) - 55 °C + 70 °C Rated Power + 200 |
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