SMR3P (Z1-Foil) Vishay Foil Resistors Ultra High Precision Industrial Grade with the Second Generation of Z-Foil (Z1-Foil) Molded Surface Mount Resistor with TCR down to 0.5 ppm/C Maximum, PCR of 5 ppm at Rated Power, Flexible Terminations, and Load Life Stability of 0.005 % (50 ppm) FEATURES Flexible Termination INTRODUCTION Flexible Terminations with Zero TCR Vishay's new flexible termination resistor with the second generation of Z-Foil (Z1-Foil) features new orders of accuracy, stability and speed in a size small enough for permanent assembly in operational equipment. It is well known that chips of 1206 and larger dimensions occasionally delaminate from the printed circuit board or develop cracks. This is due to stresses introduced into the chip by handling of the PC board and stress due to thermal shock. Vishay has introduced a chip in a molded package with flexible terminations which does not change due to the above, i.e. no cracks and no separation from the board. The SMR3P is the industry's lowest absolute TCR, thus reducing a major source of uncertainty in precision circuits. The SMR3P can withstand unconventional environmental conditions, including the extremely high temperatures and radiation-rich environments of down-hole oil exploration and well logging, or the deep-sea underwater repeaters in cross-ocean communications. The exceptionally-low TCR of the new Z-Foil Bulk Metal(R) Foil resistor derives from an elegant balance of metallurgical resistivity and temperature-induced compressive force. The SMR3P comes with a Load Life Stability certificate: The Bulk Metal Z-Foil resistor has documented the most precise load-life stability of any resistor. That's because the resistance element is a Bulk Metal Z-alloy that has been applied to a substrate with a unique formation of a resistive pattern that is maintained stress-free through the balance of the process, including termination welding, encapsulation, marking, curing, etc. Coatings between the element and the external case isolate the element from external stresses. The flat planar foil very efficiently transmits heat to the substrate and dissipates it through the leads and through the package body. The SMR series of surface-mounts has the further advantage of flexible terminations to isolate the element from repetitive expansions and contractions of the board, thereby assuring even better long-term stability. Moreover, all Vishay Bulk Metal Foil resistors are rated to maintain rated stability at full rated power and temperature. So it is not necessary to de-rate the foil resistors in application. Application includes: 1. Secondary standards 2. Feedback devices for operational amplifiers 3. Precision voltage dividers 4. Precision bridge resistors 5. Decade voltage dividers Our application engineering department is available to advise and make recommendations. For non-standard technical requirements and special applications, please contact us. Temperature coefficient of resistance (TCR): 0.5 ppm/C maximum (+ 25 C to + 125 C) Tolerance: to 0.01 % Power coefficient of resistance (PCR) "R due to self heating": 5 ppm at rated power Flexible terminations ensure minimal stress transference from the PCB due to load induced temperature gradients and a difference in thermal coefficient of expansions (TCE) Electrostatic discharge (ESD) up to 25 000 V Load life stability: 0.005 % (70 C, 2000 h at rated power) Resistance range: 100 to 15 k Vishay Foil resistors are not restricted to standard values; specific "as-required" values can be supplied at no extra cost or delivery (e.g. 1K0002 vs. 1K) Power rating: to 600 mW at 70 C Non-inductive, non-capacitive design Current noise: 0.010 VRMS/V of applied voltage (< - 40 dB) Voltage coefficient: < 0.1 ppm/V Non-inductive: < 0.08 H typical Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) Pattern design minimizing hot spots Terminal finish: lead (Pb)-free or tin/lead alloy Matched sets with TCR tracking are available upon request For better performances please contact us Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com Compliant to RoHS directive 2002/95/EC APPLICATIONS Precision amplifiers High precision instrumentation Medical Automatic test equipment (ATE) Industrial Audio (high end stereo equipment) EB application Pulse application Measurement instrumentation R2 Vin R1 - Vout + SMR Pair TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE (1) VALUE MAXIMUM MAXIMUM TIGHTEST TCR (ppm/C) TCR (ppm/C) TOLERANCE (+ 25 C to (- 55 C to + 125 C) + 25 C) 100 to 15 k 0.01 % 0.5 2 Note (1) Tighter performances are available * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63185 Revision: 29-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 1 SMR3P (Z1-Foil) Vishay Foil Resistors FIGURE 2 - TRIMMING TO VALUES (conceptual illustration) FIGURE 1 - POWER DERATING CURVE Percent of Rated Power (%) 200 - 55 C + 70 C 175 Interloop Capacitance Reduction in Series 150 125 100 Current Path Before Trimming Current Path After Trimming Mutual Inductance Reduction due to Opposing Current in Adjacent Lines 75 50 Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance 25 0 - 75 - 25 + 25 + 75 + 125 Ambient Temperature (C) + 175 Note: Foil shown in black, etched spaces in white FIGURE 3 - TYPICAL TCR CURVE Z-FOIL + 500 + 400 + 300 + 200 + 100 R 0 R (ppm) - 100 0.05 ppm/C - 200 0.1 ppm/C - 300 0.14 ppm/C - 400 0.2 ppm/C - 500 + 25 + 60 + 75 + 100 + 125 Ambient Temperature (C) Note * For more details, see table 1 FIGURE 4 - THERMAL EXPANSION Vishay Bulk Metall Foil SMR Resistor Wrap Around Metal Film Before Thermal Expansion of PCB Before Thermal Expansion of PCB Flexible Terminal Chip Raised Crack Soldering Crack After Thermal Expansion of PCB - T www.foilresistors.com 2 After Thermal Expansion of PCB - T For any questions, contact: foil@vishaypg.com Document Number: 63185 Revision: 29-Mar-10 SMR3P (Z1-Foil) Vishay Foil Resistors TABLE 2 - SMR3P PERFORMANCE SPECIFICATIONS CONDITIONS MAXIMUM LIMIT (1) 100 to 15 k0.6 W at 70 C; 0.3 W at 125 C 100 to 15 k See figure 1 180 V TEST Resistance Range Rated Power Maximum Working Voltage Maximum Operating Temperature Working Temperature Range Thermal Shock Short Time Overload Low Temperature Storage Low Temperature Operation Dielectric Withstanding Voltage (DWV) Insulation Resistance (M) Resistance to Soldering Heat (%) Moisture Resistance Shock Vibration, High Frequency + 175 C (see figure 1) - 55 C to + 125 C (MIL range) - 65 C to + 150 C; 30 min; 5 cycles 6.25 x rated power; 5 s - 65 C, 24 h 45 min at rated power at - 65 C Atmospheric pressure; AC 200 V; 1 min DC 100 V; 1 min 260 C; 10 sec + 65 C to - 10 C; 90 % to 98 % RH; rated power; 240 h 100 G; sawtooth at 6 ms 10 Hz to 2000 Hz to 10 Hz; 20 G Load Life Stability (2000 h) 0.15 W at + 70 C 0.6 W at + 70 C 0.3 W at + 125 C Load Life Stability (10 000 h) High Temperature Exposure 175 C; no load 2000 h Weight 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 0.01 % (100 ppm) 0.01 % (100 ppm) 0.01 % (100 ppm) 0.01 % (100 ppm) 0.01 % (100 ppm) over 10 000 0.02 % max., 0.01 % typ. 0.02 % (200 ppm) 0.01 % (100 ppm) 0.01 % (100 ppm) 0.002 % typ., 0.01 % max. 0.005 % typ., 0.015 % max. 0.005 % typ., 0.015 % max. 0.005 % typ., 0.015 % max. 0.015 % typ., 0.05 % max. 0.015 % typ., 0.05 % max. 0.05 % (500 ppm) 0.244 g FIGURE 4 - DIMENSIONS in inches (millimeters) Side View L TH Minimum Top View VALUE (5 DIGITS) 100R0T V Stand Off TOLERANCE Z-FOIL INDICATOR z (DATE CODE) - P P End View H W Bottom View LEAD (Pb)-FREE INDICATOR TW MODEL L W H P TW TH (minimum) SMR3P 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 5 - 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. SMR3P 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 Document Number: 63185 Revision: 29-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 3 SMR3P (Z1-Foil) Vishay Foil Resistors TABLE 3 - GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y116810K0000T9R (preferred part number format) DENOTES PRECISION VALUE R= K = k Y Y 1 CHARACTERISTICS 1 6 8 1 0 0 = standard 9 = lead (Pb)-free 1 to 999 = custom K 0 0 PRODUCT CODE RESISTANCE TOLERANCE 1168 = SMR3P 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 Y1168 10K0000 T 9 R: TYPE: SMR3P VALUE: 10.0 k ABSOLUTE TOLERANCE: 0.01 % TERMINATION: Lead (Pb)-free PACKAGING: Tape and reel HISTORICAL PART NUMBER: SMR3P 10K000 TCR0.2 T S T (will continue to be used) SMR3P 10K000 TCR0.2 T S T MODEL OHMIC VALUE TCR CHARACTERISTIC RESISTANCE TOLERANCE TERMINATION PACKAGING SMR3P 10.0 k 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 (1) For non-standard requests, please contact application engineering. www.foilresistors.com 4 For any questions, contact: foil@vishaypg.com Document Number: 63185 Revision: 29-Mar-10 Legal Disclaimer Notice Vishay Precision Group Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. 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