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) FEATURES Temperature coefficient of resistance (TCR): 2 ppmC 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 Any value at any tolerance available within resistance range in thermal coefficient of expansions (TCE) Electrostatic discharge (ESD) above 25 000 V INTRODUCTION Load life stability: 0.005 % (70 C, 2000 h at rated power) The SMRxD is a precision molded surface mountable Resistance range: 5 to 80 k (for higher and lower resistor offering all the elements of precision including low values, please contact us) TCR, tight tolerance, long term stability, low noise, low Power rating: to 600 mW at 70 C thermal EMF, and non-measurable voltage coefficient. It Non inductive, non capacitive design utilizes the Bulk Metal Foil technology for the resistive Current noise: - 40 dB element with its inherent low and predictable TCR and long Voltage coefficient: < 0.1 ppm/V term stability. This surface mountable product affords similar Non inductive: < 0.08 H performance to the time tested S series molded through-hole Non hot spot design product. Terminal finishes available: lead (Pb)-free tin/lead alloy The flexible terminations of this product also reduce Matched sets with TCR tracking are available upon request stress transference from the PCB to the resistor. Any value available within resistance range (e.g. 1K234) Voltage division with tight tracking < 3 ppm/C can be Prototype samples available from 48 h. For more achieved with 2 randomly selected units even with a large information, please contact foil vishaypg.com ratio between the two values. For better performances please review SMRxDZ datasheet Our Application Engineering Department is available to APPLICATIONS advise and make recommendations. For non-standard Military, airborne and space technical requirements and special applications, please Precision amplifiers contact us. High precision instrumentation Medical TABLE 1 - THE SMRxD SERIES IS LISTED R 2 Automatic test equipment (ATE) IN THE FOLLOWING DSCC Industrial SPECIFICATIONS R 1 Audio (high end stereo V - MODEL DSCC MIL SPEC in equipment) V out + SMR1D 06020 MIL-PRF-55182 EB application SMR3D 06021 MIL-PRF-55182 SMRxD Pulse application Measurement instrumentation TABLE 2 - TOLERANCE AND TCR VERSUS FIGURE 1 - POWER DERATING CURVE RESISTANCE VALUE - 55 C + 70 C (- 55 C to + 125 C, + 25 C ref.) 200 TYPICAL TCR AND 175 STANDARD 1) VALUE MAX. SPREAD 1) TOLERANCE 150 (ppm/C) 125 50 to 80 k 0.01 % 2 3 100 20 to < 50 0.02 % 2 4 75 10 to < 20 0.05 % 2 6 50 25 5 to < 10 0.1 % 2 8 Note 0 - 75 - 25 + 25 + 75 + 125 + 175 1. Tighter performances are available Ambient Temperature (C) * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63102 For any questions, contact: foil vishaypg.com www.foilresistors.com Revision: 23-Mar-10 1 Percent of Rated Power (%)SMR1D/SMR3D Vishay Foil Resistors TABLE 3 - PERFORMANCE SPECIFICATIONS 1) TEST CONDITIONS MAXIMUM LIMIT SMR1D SMR3D SMR1D SMR3D Resistance Range 5 to 33 k 5 to 80 k 5 to 10 k 10 k to 33 k 5 to 30 k 30 k to 80 k Rated Power 0.250 W at 70 C 0.160 W at 70 C 0.6 W at 70 C 0.4 W at 70 C see figure 1 0.125 W at 125 C 0.08 W at 125 C 0.3 W at 125 C 0.2 W at 125 C Maximum Working Voltage 73 V 180 V Maximum Operating + 175 C (see figure 1) Temperature Working Temperature Range - 55 C to + 125 C (MIL range) Thermal Shock - 65 C to + 150 C 30 min 5 cycles 0.01 % (100 ppm) Short Time Overload 6.25 x rated power 5 s 0.01 % (100 ppm) Low Temperature Storage 24 h at - 65 C 0.01 % (100 ppm) Low Temperature Operation 45 min, rated power at - 65 C 0.01 % (100 ppm) Dielectric Withstanding atmospheric pressure AC 200 V 1 min 0.01 % (100 ppm) Voltage Insulation Resistance (M) DC 100 V 1 min over 10 000 Resistance to 260 C 10 s 0.02 %, 0.01 % typical Soldering Heat (%) Moisture Resistance + 65 C to - 10 C 90 % to 98 % RH rated power 240 h 0.02 % (200 ppm) Shock 100 G sawtooth 0.01 % (100 ppm) Vibration, High Frequency 10 ~ 2000 ~ 10 Hz 20 G Y, Z each 4 h 0.01 % (100 ppm) Typical Typical 0.04 W at + 70 C 0.1 W at + 70 C 0.005 % 0.005 % Load Life Stability (2000 h) 0.25 W at + 70 C 0.6 W at + 70 C 0.02 % 0.015 % 0.125 W at + 125 C 0.3 W at + 125 C 0.02 % 0.015 % High Temperature Exposure 175 C no load 2000 h 0.05 % (500 ppm) Weight 0.1143 g 0.244 g Packaging bulk (loose) or tape and reel, per EIA-481-1 Note 1. As shown + 0.01 to allow for measurement error at low values www.foilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63102 2 Revision: 23-Mar-10