VPR5Z, VPR7Z Vishay Foil Resistors Ultra High Precision Bulk Metal(R) Z-Foil Technology Power Current Sensing Resistors with TCR of 0.05 ppm/C and Power Rating up to 7 W FEATURES * Temperature coefficient of resistance (TCR): 0.05 ppm/C (0 C to 60 C) 0.2 ppm/C (- 55 C to + 125 C, + 25 C ref.) NEW * Tolerance: 0.01 % * Resistance range: 5 to 100 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) INTRODUCTION These Bulk Metal(R) Z-Foil power current sensing resistors are direct replacements for certain wirewound devices but without the inductive characteristics of wirewounds. The anodized aluminum housing is drilled and countersunk to accept flat head screws for thermal mounting. Because the device is internally Kelvin connected, there is no restriction on the lead lengths as would be the case if this were a two terminal device. Frequently used in YIG oscillator circuits these devices contribute to superior frequency stability. * Load life stability: 0.01 % (100 ppm) at 70 C, 2000 h at rated power * Electrostatic discharge (ESD) 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 stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) * Thermal EMF: 0.05 V/C typical * Voltage coefficient: < 0.1 ppm/V * Non-inductive: < 0.08 H * Pattern design minimizing hot spots * Terminal finish available: lead (Pb)-free or tin/lead alloy* * Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE MODEL NUMBER VPR5Z VPR7Z RESISTANCE RANGE () BEST TOLERANCE (%) TYPICAL TCR AND MAXIMUM SPREAD (- 55 C to + 125 C, + 25 C ref.) (ppm/C) 5 to 10 0.1 0.2 4.3 > 10 to 50 0.05 0.2 3.8 > 50 to 100 0.05 0.2 2.8 > 100 to 100K 0.01 0.2 1.8 5 to 10 0.1 0.2 4.3 > 10 to 50 0.05 0.2 3.8 > 50 to 100 0.05 0.2 2.8 > 100 to 100K 0.01 0.2 1.8 MAXIMUM WORKING VOLTAGE (V) POWER RATING AT 25 C (1) (W) 300 5 300 7 Note (1) Mounted on aluminum chassis (6" L x 4" W x 2" H x 0.040" Th) per MIL-PRF-39009/1B. * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63188 Revision: 22-Jul-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 1 VPR5Z, VPR7Z Vishay Foil Resistors FIGURE 1 - POWER DERATING CURVE 100 Rated Power (%) 75 50 25 0 - 50 0 + 25 + 50 + 100 + 150 Ambient Temperature (C) - 55 FIGURE 2 - TRIMMING TO VALUES (conceptual illustration) FIGURE 3 - TYPICAL RESISTANCE/ TEMPERATURE CURVE (Z-FOIL) + 500 + 400 Interloop Capacitance Reduction in Series + 300 Current Path Before Trimming + 200 + 100 R 0 R (ppm) - 100 Current Path After Trimming Mutual Inductance Reduction due to Opposing Current in Adjacent Lines 0.05 ppm/C - 200 Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance - 0.1 ppm/C 0.1 ppm/C - 300 0.14 ppm/C - 400 - 0.16 ppm/C 0.2 ppm/C - 500 - 55 - 25 0 + 25 + 60 + 75 + 100 + 125 Ambient Temperature (C) TCR Chord Slopes for Different Temperature Ranges Note: Foil shown in black, etched spaces in white TABLE 2 - STANDARD IMPRINTING AND DIMENSIONS D E1 Mounting Holes (1) E2 E Vishay VPR5Z 100R01 0.1 % I1 4) B 4) R I2 I I 3) E1 E2 (2) I1 3) I2 XXXX C I1 E1 E2 I2 V Date Code 10 10 Year Week A F DIMENSIONS A in 0.625 1.030 B mm 15.88 26.16 in 0.450 0.450 C mm 11.43 11.43 in 0.312 0.312 D mm 7.93 7.93 in 0.400 0.788 E mm 10.16 20.02 in 0.350 0.350 mm 8.89 8.89 F (min) in mm 1.500 38.10 1.375 34.90 Notes #4-40 F.H. machine screw (not included) Anodized aluminum housing #26 AWG, teflon coated, 4" min. #20 AWG, solder coated copper (1) (2) (3) (4) www.foilresistors.com 2 For any questions, contact: foil@vishaypg.com Document Number: 63188 Revision: 22-Jul-10 VPR5Z, VPR7Z Vishay Foil Resistors POST MANUFACTURING OPERATIONS (PMO) 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. TABLE 4 - GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y011825K5000T9L (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS Y R= K = K 0 = standard 9 = lead (Pb)-free 1 to 999 = custom Y 0 1 1 8 2 5 K 5 0 0 0 T 9 L PRODUCT CODE RESISTANCE TOLERANCE PACKAGING 0118 = VPR5Z 0119 = VPR7Z T = 0.01 % A = 0.05 % B = 0.1 % L = bulk FOR EXAMPLE: ABOVE GLOBAL ORDER Y0118 25K5000 T 9 L: TYPE: VPR5Z VALUE: 25.5 k ABSOLUTE TOLERANCE: 0.01 % TERMINATION: lead (Pb)-free PACKAGING: bulk HISTORICAL PART NUMBER: VPR5Z T 25K500 T B (will continue to be used) VPR5Z T 25K500 MODEL TERMINATION OHMIC VALUE VPR5Z VPR7Z T = lead (Pb)-free None = tin/lead alloy 25.5 K T RESISTANCE TOLERANCE T = 0.01 % A = 0.05 % B = 0.1 % B PACKAGING B = bulk Note (1) For non-standard requests, please contact application engineering. Document Number: 63188 Revision: 22-Jul-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 3 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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