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SMR3D Datasheet(PDF) 1 Page - Vishay Siliconix |
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SMR3D Datasheet(HTML) 1 Page - Vishay Siliconix |
1 / 5 page SMR1D/SMR3D Vishay Foil Resistors High Precision Bulk Metal® Foil Molded Surface Mount Resistor with TCR down to ± 2 ppm/°C, Flexible Terminations, and Load Life Stability of ± 0.005 % (50 ppm) Document Number: 63102 For any questions, contact: foil@vishay.com www.vishay.com Revision: 14-Nov-07 1 Any value at any tolerance available within resistance range INTRODUCTION The SMRxD is a precision molded surface mountable resistor offering all the elements of precision; including low TCR, tight tolerance, long term stability, low noise, low thermal EMF, and non-measurable voltage coefficient. It utilizes the Bulk Metal® Foil technology for the resistive element with its inherent low and predictable TCR and long term stability. This surface mountable product affords similar performance to the time tested S series molded through-hole product. The flexible terminations of this product also reduce stress transference from the PCB to the resistor. Voltage division with tight tracking < 3 ppm/°C can be achieved with 2 randomly selected units even with a large ratio between the two values. Our Application Engineering Department is available to advise and make recommendations. For non-standard technical requirements and special applications, please contact us. Note 1. Tighter performances are available FEATURES • Temperature coefficient of resistance (TCR): ± 2 ppm°C typical (- 55 °C to + 125 °C, + 25 °C ref.) • Tolerance: to ± 0.01 % • Flexible terminations ensure minimal stress transference from the PCB due to a difference in thermal coefficient of expansions (TCE) • Electrostatic discharge (ESD) above 25 000 V • Load life stability: ± 0.005 % (70 °C, 2000 h at rated power) • Resistance range: 5 Ω to 80 kΩ (for higher and lower values, please contact us) • Power rating: to 600 mW at 70 °C • Non inductive, non capacitive design • Current noise: - 40 dB • Voltage coefficient: < 0.1 ppm/V • Non inductive: < 0.08 µH • Non hot spot design • Terminal finishes available: lead (Pb)-free tin/lead alloy • Matched sets with TCR tracking are available upon request • Any value available within resistance range (e.g. 1K234) • Prototype samples available from 48 h. For more information, please contact foil@vishay.com • For better performances please review SMRxDZ datasheet APPLICATIONS • Military, airborne and space • Precision amplifiers • High precision instrumentation • Medical • Automatic test equipment (ATE) • Industrial • Audio (high end stereo equipment) • EB application • Pulse application • Measurement instrumentation * Pb containing terminations are not RoHS compliant, exemptions may apply TABLE 1 - THE SMRxD SERIES IS LISTED IN THE FOLLOWING DSCC SPECIFICATIONS MODEL DSCC MIL SPEC SMR1D 06020 MIL-PRF-55182 SMR3D 06021 MIL-PRF-55182 TABLE 2 - TOLERANCE AND TCR VERSUS RESISTANCE VALUE (- 55 °C to + 125 °C, + 25 °C Ref.) VALUE STANDARD TOLERANCE1) TYPICAL TCR AND MAX. SPREAD1) (ppm/°C) 50 Ω to 80 kΩ ± 0.01 % ± 2 ± 3 20 Ω to < 50 Ω ± 0.02 % ± 2 ± 4 10 Ω to < 20 Ω ± 0.05 % ± 2 ± 6 5 Ω to < 10 Ω ± 0.1 % ± 2 ± 8 FIGURE 1 - POWER DERATING CURVE Available Pb-free RoHS* COMPLIANT R 1 R 2 V in V out - + SMRxD 200 175 150 125 100 75 50 25 0 - 75 - 25 + 25 + 75 + 125 + 175 Ambient Temperature (°C) - 55 °C + 70 °C |
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