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 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. 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 APPLICATIONS • • • • • • • Military, airborne and space Precision amplifiers High precision instrumentation Medical Automatic test equipment (ATE) Industrial Audio (high end stereo Vin equipment) • EB application • Pulse application • Measurement instrumentation 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 Note 1. Tighter performances are available R2 R1 - Vout + SMRxD FIGURE 1 - POWER DERATING CURVE 200 Percent of Rated Power (%) Any value at any tolerance available within resistance range • Temperature coefficient of resistance (TCR): ± 2 ppm°C typical (- 55 °C to + 125 °C, Pb-free + 25 °C ref.) Available • Tolerance: to ± 0.01 % RoHS* • Flexible terminations ensure minimal stress COMPLIANT 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 [email protected] • For better performances please review SMRxDZ datasheet - 55 °C + 70 °C 175 150 125 100 75 50 25 0 - 75 - 25 + 25 + 75 + 125 Ambient Temperature (°C) + 175 * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63102 Revision: 14-Nov-07 For any questions, contact: [email protected] www.vishay.com 1 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) TABLE 3 - PERFORMANCE SPECIFICATIONS TEST MAXIMUM LIMIT1) CONDITIONS SMR1D SMR3D Resistance Range Rated Power 10 kΩ to 33 kΩ 5 Ω to 10 kΩ 0.250 W at 70 °C 0.160 W at 70 °C 0.125 W at 125 °C 0.08 W at 125 °C 5 Ω to 30 kΩ 0.6 W at 70 °C 0.3 W at 125 °C 30 kΩ to 80 kΩ 0.4 W at 70 °C 0.2 W at 125 °C Maximum Working Voltage Maximum Operating Temperature Working Temperature Range Thermal Shock Short Time Overload Dielectric Withstanding Voltage High Temperature Exposure 180 V ± 0.01 % (100 ppm) 6.25 x rated power; 5 s ± 0.01 % (100 ppm) 24 h at - 65 °C ± 0.01 % (100 ppm) 45 min, rated power at - 65 °C ± 0.01 % (100 ppm) atmospheric pressure; AC 200 V; 1 min ± 0.01 % (100 ppm) DC 100 V; 1 min over 10 000 260 °C; 10 s ± 0.02 %, ± 0.01 % typical + 65 °C to - 10 °C; 90 % to 98 % RH; rated power; 240 h ± 0.02 % (200 ppm) 100 G; sawtooth ± 0.01 % (100 ppm) 10 ~ 2000 ~ 10 Hz; 20 G; Y, Z each 4 h ± 0.01 % (100 ppm) 0.04 W at + 70 °C 0.25 W at + 70 °C 0.125 W at + 125 °C 0.1 W at + 70 °C 0.6 W at + 70 °C 0.3 W at + 125 °C 175 °C; no load 2000 h Weight Packaging see figure 1 - 65 °C to + 150 °C; 30 min; 5 cycles Shock Load Life Stability (2000 h) 5 Ω to 80 kΩ - 55 °C to + 125 °C (MIL range) Resistance to Soldering Heat (%) Vibration, High Frequency 5 Ω to 33 kΩ + 175 °C (see figure 1) Insulation Resistance (MΩ) Moisture Resistance SMR3D 73 V Low Temperature Storage Low Temperature Operation SMR1D Typical 0.005 % 0.02 % 0.02 % Typical 0.005 % 0.015 % 0.015 % ± 0.05 % (500 ppm) 0.1143 g 0.244 g bulk (loose) or tape and reel, per EIA-481-1 Note 1. As shown + 0.01 Ω to allow for measurement error at low values www.vishay.com 2 For any questions, contact: [email protected] Document Number: 63102 Revision: 14-Nov-07 SMR1D/SMR3D High Precision Bulk Metal® Foil Molded Surface Mount Vishay Foil Resistors Resistor with TCR down to ± 2 ppm/°C, Flexible Terminations, and Load Life Stability of ± 0.005 % (50 ppm) FIGURE 2 - DIMENSIONS in inches (millimeters) Side View L TH Minimum VALUE (5 DIGITS) Top View P P H 100R0T V End View Stand Off TOLERANCE W - (DATE CODE) TW Bottom View LEAD (Pb)-FREE INDICATOR MODEL L W H P TW TH (minimum) SMR1D 0.236 ± 0.012 (5.99 ± 0.30) 0.126 ± 0.012 (3.20 ± 0.30) 0.098 ± 0.012 (2.49 ± 0.30) 0.051 ± 0.012 (1.30 ± 0.30) 0.087 ± 0.004 (2.21 ± 0.10) 0.039 (0.99) SMR3D 0.287 ± 0.012 (7.29 ± 0.30) 0.170 ± 0.012 (4.32 ± 0.30) 0.110 ± 0.012 (2.79 ± 0.30) 0.051 ± 0.012 (1.30 ± 0.30) 0.095 ± 0.004 (2.41 ± 0.10) 0.039 (0.99) FIGURE 3 - RECOMMENDED MOUNTING PAD GEOMETRIES in inches (millimeters) Reflow Solder Pads D C B E A MODEL METHOD A MIN. B REF C REF D ± 0.04 (± 1.02) E REF SMR1D Reflow 0.110 (2.79) 0.106 (2.69) 0.124 (3.15) 0.337 (8.55) 0.050 (1.27) SMR3D Reflow 0.118 (3.00) 0.106 (2.69) 0.175 (4.45) 0.388 (9.86) 0.050 (1.27) Per IPC-SM-782 Rev. A FIGURE 4 - TRIMMING TO VALUES (Conceptual Illustration) FIGURE 5 - TYPICAL TCR CURVE (For more details, see table 2) + 150 + 100 Current Path Before Trimming Interloop Capacitance Reduction in Series Current Path After Trimming Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance Mutual Inductance Reduction due to Change in Current Direction + 50 ΔR R (ppm) 0 - 50 - 100 ± 2 ppm/°C (+ 25 °C Reference) - 150 - 200 - 50 - 55 - 25 NOTE: Foil shown in black, etched spaces in white 0 + 25 + 50 + 75 + 100 + 125 Ambient Temperature (°C) Note: The TCR values for < 80 Ω are influenced by the termination composition and the result in deviation from this curve Document Number: 63102 Revision: 14-Nov-07 For any questions, contact: [email protected] www.vishay.com 3 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) TABLE 4 - GLOBAL PART NUMBER INFORMATION NEW GLOBAL PART NUMBER: Y112110K0000T9R (preferred part number format) DENOTES PRECISION VALUE R=Ω K = kΩ Y Y 1 AER* 1 2 1 1 0 0 = standard 9 = lead (Pb)-free 1 - 999 = Custom K 0 0 PRODUCT CODE RESISTANCE TOLERANCE 1121 = SMR1D 1169 = SMR3D T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F = ± 1.0 % 0 0 T 9 R PACKAGING L = bulk pack R = tape and reel FOR EXAMPLE: ABOVE GLOBAL ORDER Y1121 10K0000 T 9 R: TYPE: SMR1D VALUE: 10.0 kΩ ABSOLUTE TOLERANCE: ± 0.01 % TERMINATION: lead (Pb)-free PACKAGING: tape and reel HISTORICAL PART NUMBER: SMR1D 10K000 TCR2 T S T (will continue to be used) SMR1D 10K000 TCR2 T S T MODEL OHMIC VALUE TCR CHARACTERISTIC RESISTANCE TOLERANCE TERMINATION PACKAGING SMR1D SMR3D 10.0 kΩ S = lead (Pb)-free B = tin/lead B = bulk pack T = tape and reel T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F = ± 1.0 % Note * For non-standard requests, please contact application engineering. www.vishay.com 4 For any questions, contact: [email protected] Document Number: 63102 Revision: 14-Nov-07 Legal Disclaimer Notice Vishay Notice Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Vishay for any damages resulting from such improper use or sale. Document Number: 91000 Revision: 08-Apr-05 www.vishay.com 1