Z Series (Z-Foil) Vishay Foil Resistors Ultra High Precision Z-Foil Resistor with TCR of 0.05 ppm/C, Tolerance of 0.005 % (50 ppm), Load Life Stability of 0.005 %, ESD Immunity up to 25 kV and Thermal EMF of 0.05 V/C FEATURES NEW INTRODUCTION The Bulk Metal(R) Foil resistor is based on a special concept where a proprietary bulk metal cold rolled foil is cemented to a ceramic substrate. It is then photoetched into a resistive pattern. Furthermore, it is laser adjusted to any desired value and tolerance. Because the metals used are not drawn, wound or mistreated in any way during manufacturing process, the Bulk Metal Foil resistor maintains all its design, physical and electrical characteristics while winding of wire or sputtering does not. Z foil resistors achieve maximum stability and near-zero TCR. These performance characteristics are built-in for every unit, and do not rely on screening or other artificial means for uniform performances. The stability of a resistor depends primarily on its history of exposures to temperature. Stability is affected by: 1. Changes in the ambient temperature and heat from adjacent components (defined by the Temperature Coefficient of Resistance, or TCR) 2. Destabilizing thermal shock of suddenly-applied power (defined by the power coefficient, or PCR) 3. Long-term exposure to applied power (load-life stability) 4. Repetitive stresses from being switched on and off In very high-precision resistors, these effects must be taken into account to achieve high stability with changes in load (Joule Effect) and ambient temperature. Vishay's new Z-Foil technology provides an order of magnitude reduction in the Bulk Metal Foil element's sensitivity to temperature changes - both external and internal. This technology provides an absolute TCR of 0.05 ppm/C typical (instrument range: 0 C to +60 C), 0.2 ppm/C typical (military range: - 55 C to + 125 C, + 25 C ref), and a PCR of 5 ppm at rated power. In order to take full advantage of this TCR improvement, it is necessary to take into account the differences in the resistor's response to each of the above-mentioned effects. The Z series has been developed to successfully deal with these factors. * Temperature coefficient of resistance (TCR): - 0.05 ppm/C typical (0 C to + 60 C) - 0.2 ppm/C typical (- 55 C to + 125 C, + 25 C ref.) (see table 1) * Rated power: to 1 W at + 125 C * Resistance tolerance: to 0.005 % (50 ppm) * Load life stability: to 0.005 % at 70 C, 2000 h or to 0.015% at 70C,10000 h (see table 4) * Resistance range: 10 to 600 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. 1K2345 vs. 1K) * Total accumulated change in resistance over life (EOL) < 0.05 % (or better with PMO) * Electrostatic discharge up to 25 000 V * Non-inductive, non-capacitive design * Rise time: 1 ns effectively no ringing * Current noise: 0.010 VRMS/V of applied voltage (< - 40 dB) * Thermal EMF: 0.05 V/C typical * Voltage coefficient: < 0.1 ppm/V * Low inductance: < 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 are available per request (TCR tracking: to 0.5 ppm/C) * Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com * Load life R maximum can be reduced significantly with our post manufacturing operations (PMO) see page 4 for details FIGURE 1 - TYPICAL RESISTANCE/ TEMPERATURE CURVE (Z-FOIL) + 500 + 400 + 300 TABLE 1 - TYPICAL TCR AND MAX. SPREAD (- 55 C to + 125 C, + 25 C ref.) VALUE STANDARD TOLERANCE 100 to 600 K 80 to < 100 50 to < 80 25 to < 50 10 to < 25 0.005 % 0.005 % 0.01 % 0.01 % 0.02 % TYPICAL TCR AND MAX. SPREAD (ppm/C) 0.2 0.6 0.2 0.8 0.2 1.0 0.2 1.3 0.2 1.6 + 200 + 100 R 0 R (ppm) - 100 0.05 ppm/C - 200 - 0.1 ppm/C - 300 0.1 ppm/C 0.14 ppm/C - 400 - 0.16 ppm/C 0.2 ppm/C - 500 - 55 - 25 + 25 + 60 + 75 + 100 + 125 0 Ambient Temperature (C) and TCR Chord Slopes for Different Temperature Ranges * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63187 Revision: 21-Jul-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 1 Z Series (Z-Foil) Vishay Foil Resistors FIGURE 2 - STANDARD IMPRINTING AND DIMENSIONS Front View L H Rear View Optional Customer Part Number Print specification, etc. if required W VISHAY XXXX Z201 Date Code 10 10 Year Week XXXXXX 100R01 0.01 % Resistance Value Code Tolerance ST1) SW Model Number LS LL Lead Material #22 AWG Round Solder Coated Copper Note 1. The standoffs shall be so located as to give a lead clearance of 0.010" minimum between the resistor body and the printed circuit board when the standoffs are seated on the printed circuit board. This is to allow for proper cleaning of flux and other contaminants from the unit after all soldering processes. TABLE 2 - MODEL SELECTION MODEL NUMBER Z201 (Z201L) (1) Z204 Z205 Z206 RESISTANCE RANGE (2) () 10R to 100K 10R to 200K 10R to 300K 10R to 600K MAXIMUM WORKING VOLTAGE 300 350 350 500 AMBIENT POWER RATING at + 70 C 0.6 W 1.0 W at + 125 C 0.3 W 0.5 W 1.5 W 0.75 W 2.0 W 1.0 W up to 400K 1.0 W 0.5 W AVERAGE WEIGHT (g) DIMENSIONS INCHES mm 0.6 W: 0.105 0.010 L: 0.300 0.010 H: 0.326 0.010 ST: 0.010 min. SW: 0.035 0.010 LL: 1.000 0.125 LS: 0.150 0.005 2.67 0.25 7.62 0.25 8.28 0.25 0.254 min. 1.02 0.13 25.4 3.18 3.81 0.13 1.4 W: 0.160 max. L: 0.575 max. H: 0.413 max. ST: 0.035 0.005 SW: 0.050 0.005 LL: 1.000 0.125 LS: 0.400 0.020 4.06 max. 14.61 max. 10.49 max. 0.889 0.13 1.27 0.13 25.4 3.18 10.16 0.51 1.9 W: 0.160 max. L: 0.820 max. H: 0.413 max. ST: 0.035 0.005 SW: 0.050 0.005 LL: 1.000 0.125 LS: 0.650 0.020 4.06 max. 20.83 max. 10.49 max. 0.889 0.13 1.27 0.13 25.4 3.18 16.51 0.51 4.0 W: 0.260 max. L: 1.200 max. H: 0.413 max. ST: 0.035 0.005 SW: 0.050 0.005 LL: 1.000 0.125 LS: 0.900 0.020 6.60 max. 30.48 max. 10.49 max. 0.889 0.13 1.27 0.13 25.4 3.18 22.86 0.51 over 400K Note (1) 0.200" (5.08 mm) lead spacing available - specify Z201L for Z201. (2) for non standard values please contact Application Engineering Department at foil@vishaypg.com www.foilresistors.com 2 For any questions, contact: foil@vishaypg.com Document Number: 63187 Revision: 21-Jul-10 Z Series (Z-Foil) Vishay Foil Resistors FIGURE 4 - TRIMMING TO VALUES (conceptual illustration) FIGURE 3 - POWER DERATING CURVE 100 - 55 C + 70 C Rated Power (%) at + 70 Rated Power 75 Recommended operation for < 150 ppm R after 2000 h load life 50 0 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 25 0 - 75 - 50 - 25 Current Path Before Trimming Interloop Capacitance Reduction in Series + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200 Note: Foil shown in black, etched spaces in white Ambient Temperature (C) TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON MIL-PRF-55182 CHAR J Z SERIES TYPICAL R Z SERIES MAXIMUM R Thermal shock, 5 x (- 65 C to + 150 C) 0.2 % 0.002 % (20 ppm) 0.01 % (100 ppm) Short time overload, 6.25 x rated power 0.2 % 0.003 % (30 ppm) 0.01 % (100 ppm) 25 ppm/C 0.05 ppm/C see table 1 Low temperature storage (24 h at - 65 C) 0.15 % 0.002 % (20 ppm) 0.01 % (100 ppm) Low temperature operation (45 min, rated power at - 65 C) 0.15 % 0.002 % (20 ppm) 0.01 % (100 ppm) Terminal strength 0.2 % 0.002 % (20 ppm) 0.01 % (100 ppm) DWV 0.15 % 0.002 % (20 ppm) 0.01 % (100 ppm) Resistance to solder heat 0.1 % 0.005 % (50 ppm) 0.01 % (100 ppm) Moisture resistance 0.4 % 0.01 % (100 ppm) 0.05 % (500 ppm) Shock 0.2 % 0.002 % (20 ppm) 0.01 % (100 ppm) Vibration 0.2 % 0.002 % (20 ppm) 0.01 % (100 ppm) 2000 h 0.5 % 0.005 % (50 ppm) 0.015 % (150 ppm) 10 000 h 2.0 % 0.015 % (150 ppm) 0.05 % (500 ppm) 0.5 % 0.005 % (50 ppm) 0.015 % (150 ppm) 2.0 % 0.05 % (500 ppm) 0.1 % (1000 ppm) 5 ppm/V < 0.1 ppm/V < 0.1 ppm/V Test Group I Test Group II Resistance temperature characteristics Test Group III Test Group IV Test Group V Life test at 0.3 W/+ 125 C Test Group Va Life test at 0.6 W (2 x rated power)/+ 70 C, 2000 h Test Group VI High temperature exposure (2000 h at + 175 C) Test Group VII Voltage coefficient Document Number: 63187 Revision: 21-Jul-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 3 Z Series (Z-Foil) Vishay Foil Resistors STANDARD OPERATIONS AND TEST CONDITIONS POST MANUFACTURING OPERATIONS OR PMO A. Standard Test Operations: Many analog applications can include requirements for performance under conditions of stress beyond the normal and over extended periods of time. This calls for more than just selecting a standard device and applying it to a circuit. The standard device may turn out to be all that is needed but an analysis of the projected service conditions should be made and it may well dictate a routine of stabilization known as post manufacturing operations or PMO. The PMO operations that will be discussed are only applicable to Bulk Metal Foil resistors. They stabilize Bulk Metal Foil resistors while they are harmful to other types. Short time overload, accelerated load life, and temperature cycling are the three PMO exercises that do the most to remove the anomalies down the road. Vishay Bulk Metal Foil resistors are inherently stable as manufactured. These PMO exercises are only of value on Bulk Metal Foil resistors and they improve the performance by small but significant amounts. Users are encouraged to contact Vishay Foil applications engineering for assistance in choosing the PMO operations that are right for their application. By 100 % Inspection * Short-time overload (6.25 x rated power for 5 s) * Resistance - tolerance check * Visual and mechanical By Sample Inspection * TCR * Environmental tests per table 3 on a quarterly basis to establish performance by similarity B. Standard Test Conditions: * Lead test point: 0.5" (12.7 mm) from resistor body * Temperature: + 23 C 2 C * Relative humidity: per MIL-STD-202 TABLE 4 - "Z" SERIES SPECIFICATIONS Stability (1) Load life at 2000 h Load life at 10 000 h Current Noise 0.015 % (150 ppm) Maximum R at 0.3 W/+ 125 C 0.005 % (50 ppm) Maximum R at 0.1 W/+ 70 C 0.05 % (500 ppm) Maximum R at 0.3 W/+ 125 C 0.01 % (100 ppm) Maximum R at 0.1 W/+ 70 C 0.010 VRMS/V of applied voltage (< - 40 dB) High Frequency Operation Rise time 1.0 ns at 1 k Inductance (L) (2) 0.1 H maximum; 0.08 H typical Capacitance (C) 1.0 pF maximum; 0.5 pF typical Voltage Coefficient < 0.1 ppm/V (3) Thermal EMF (4) 0.05 V/C typical 1 V/W (Model Z201) Notes Load life R maximum can be reduced by 80 %, please contact applications engineering department. Inductance (L) due mainly to the leads. The resolution limit of existing test equipment (within the measurement capability of the equipment, or "essentially zero".) V/C relates to EMF due to lead temperature difference and V/watt due to power applied to the resistor. (1) (2) (3) (4) www.foilresistors.com 4 For any questions, contact: foil@vishaypg.com Document Number: 63187 Revision: 21-Jul-10 Z Series (Z-Foil) Vishay Foil Resistors TABLE 5 - GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y145380K5000V9L (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS Y R= K = k M = M 0 = standard 9 = lead (Pb)-free 1 to 999 = custom Y 1 4 5 3 8 0 K 5 0 0 0 V 9 PRODUCT CODE RESISTANCE TOLERANCE PACKAGING 1453 = Z201 1454 = Z201L 1441 = Z204 1443 = Z205 1447 = Z206 V = 0.005 % T = 0.01 % Q = 0.02 % A = 0.05 % B = 0.1 % C = 0.25 % D = 0.5 % F = 1.0 % L = bulk pack L FOR EXAMPLE: ABOVE GLOBAL ORDER Y1453 80K5000 V 9 L: TYPE: Z201 VALUE: 80.5 k ABSOLUTE TOLERANCE: 0.005 % TERMINATION: lead (Pb)-free PACKAGING: bulk pack HISTORICAL PART NUMBER: Z201 T 250R00 V B (will continue to be used) Z201 T 250R00 V B MODEL TERMINATION Z201 Z201L Z204 Z205 Z206 T = lead (Pb)-free None = tin/lead alloy RESISTANCE VALUE TOLERANCE 250R00 = 250.00 5K2310 = 5.231 k 1M000 = 1 M V = 0.005 % T = 0.01 % Q = 0.02 % A = 0.05 % B = 0.1 % C = 0.25 % D = 0.5 % F = 1.0 % PACKAGING B = bulk pack Note (1) For non-standard requests, please contact application engineering. Document Number: 63187 Revision: 21-Jul-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 5 Legal Disclaimer Notice Vishay Precision Group Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay Precision Group"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. The product specifications do not expand or otherwise modify Vishay Precision Group's terms and conditions of purchase, including but not limited to, the warranty expressed therein. Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms and conditions of purchase. 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