Vishay Foil Resistors - VPG | Performance through …

1 Ultra-High Precision Hermetically Sealed Bulk Metal foil resistor with Zero TCR, no Humidity Effect and % Tolerance within a Unique Construction, Minimizing the Effects of Stress FactorsVHP100 Vishay foil Resistors Document Number: 63003 For any questions, contact: 23-Mar-101 INTRODUCTIONThe new VHP100 type represents a metrology new construction concept combined with specialtreatments make this resistor the first choice in the mostdemanding instrumentation and laboratory ability of the new VHP100 to minimize the changes inresistance value when the resistor is subjected to loadvariations and thermal stresses, ensure the ultra highperformances for the tight metrology total error budget of 2 ppm drift and the high speedrecovery represent an improvement of almost an order ofmagnitude on the earlier has achieved an essentially Zero TemperatureCoefficient resistor in the VHP100 type.

2 This oil filledhermetically sealed device makes unique use of foil onceramic in such a way that self cancelling responses totemperature are produced by combining equal and oppositeeffects. This product is sold only in hermetic packagesbecause applications requiring this level of temperaturestability require humidity stability as value of the hermetic enclosure over the molded part isin the long term Performance . The hermetic sealing preventsthe ingress of moisture and oxygen, while the oil acts as athermal WINDOW DEFINITIONThe TCR of the VHP100 is so small that an additionaldefinition - window, has been introduced. The windowdefinition requires that the absolute resistance remain withinthe stated window over the temperature range specified. Theresistance of the VHP100 resistor stays within a 60 ppmwindow over the entire military temperature range of - 55 Cto + 125 C (figures 1 and 3).

3 A window of 10 ppm is available for the laboratory instrumentrange (+ 15 C to + 45 C); see figure 4 - type TRACKINGT racking of the VHP100 resistor is also vastly superior toconventional precision Resistors . Typical 5 ppm/ C precisionresistors have a worst-case tracking of 10 ppm/ C(wirewounds, thick film, thin film) or a difference betweenresistors of 1000 ppm (10 ppm/ C x 100 C) whentemperature changes from + 25 C to + 125 C. For a3 ppm/ C tracking ( Vishay S102C) the difference will be300 ppm (3 ppm/ C x 100 C) for the same temperaturerange. The VHP100 Resistors will track to 60 ppm from - 55 Cto + 125 C, a five-fold improvement over the S102C Essentially zero TCR Absolute resistance change (window): VHP100 < 60 ppm (- 55 C to + 125 C) VHP101 < 10 ppm (+ 15 C to + 45 C) Tolerance: to % (50 ppm) - (available to % (10 ppm)) No humidity effect: hermetically sealed against moisture Load life stability: 50 ppm typical for 2000 h, 70 C W Shelf life stability: 2 ppm typical after at least 6 years Resistance range: 100 to 150 k (higher or lower valuesavailable on request) Vishay foil Resistors are not restricted to standard values;specific as required values can be supplied at no extracost or delivery ( 1K2345 vs.)

4 1K) Electrostatic discharge (ESD) up to 25 000 V Non inductive, non capacitive design Rise time: 1 ns effectively no ringing Thermal stabilization < 1 s Current noise: VRMS/V of applied voltage (< - 40 dB) Thermal EMF: V/ C typical Voltage coefficient: < ppm/V Inductance: < H Non hot spot design Hermeticity: 10-7 atmospheric cc/s max. Terminal finish: lead (Pb)-free, tin/lead alloy Compliant to RoHS directive 2002/95/EC Oil filled as standard, air filled available upon request Load-life stability can be considerably improved throughin-house oriented testsPOST MANUFACTURING OPERATIONS ENHANCE THE ALREADY GREATER STABILITY OF foil RESISTORST hese PMO operations are uniquely applicable to resistorsmade of resistive foil and they take the already superiorstability of foil devices one step further. The PMO operationsdescribed are not applicable to thick film, thin film, or constitute an exercising of the resin that bonds the foilto the exercises that are employed are (1) temperature cycling(2) short time overload, and (3) accelerated load CYCLINGThis exercise is done initially in the chip stage of allproduction and will eliminate any fallout in the PMO cycling exercises the bonding resin and relaxes the foilwithout reducing the bonding strength.

5 A small reduction inresistance is tolerable during this PMO operation.* Pb containing terminations are not RoHS compliant, exemptions may applyVHP100 Vishay foil Resistors any questions, contact: Number: 630032 Revision: 23-Mar-10 SHORT TIME OVERLOADThe STO operation is performed on all Resistors duringmanufacturing. Its function is to eliminate sports (if any) sothis PMO operation is further LOADThe standard load-life curve of a foil resistor exhibits achange in the beginning and not much change after the first100 h. This knee in the load-life curve can be removed sothat the resistor is now always on the flat part of the curve byemploying the PMO exercise of accelerated loading. Howmuch acceleration is a function of the application and shouldbe worked out between our applications engineeringdepartment and your design same operations when applied to Resistors of thickfilm, thin film, and wire have vastly different consequencesand are applicable to foil only.

6 They are an enhancement tofoil Performance but can drive other devices out of toleranceor open. The failure mechanisms in these other devises aretoo numerous to discuss here but suffice it to say, foil is theleast affected by these PMO operations and they should beconsidered when the level of stability required is beyond thepublished limits for standard (1)For lead spacing, specify VHP102 (60 ppm) or VHP103(10 ppm).FIGURE 1 - A TYPICAL VHP100 RESISTANCE TEMPERATURE CURVEFIGURE 2 - POWER DERATING CURVEFIGURE 3 - TYPICAL CURVES WITHIN THE 60 ppm WINDOW, VHP100 TCR FOR MIL RANGE60 ppmWindowDeviation ppm- 55- 250+ 25+ 50+ 75+ 100+ 125 Temperature ( C)+ 100 %+ 75 %+ 50 %+ 25 %0 Ambient Temperature ( C)Percent of Rated Power- 55 C+ 70 C Rated Power- 75 - 50 - 250 + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 20060 ppmWindowDeviation ppm- 55- 250+ 25+ 50+ 75+ 100+ 125 Temperature ( C)(- 55 C to + 125 C): Typical TCR = ppm/ C, Ref.

7 + 25 CFIGURE 4 - TYPICAL CURVES WITHIN 10 ppm WINDOW, VHP101 LABORATORY INSTRUMENT RANGEFIGURE 5 - STANDARD PRINTINGTOLERANCERESISTANCE SPECIFIED IN SIGNIFICANT DIGITS %3 %4 %5 %6 NoteThe number of significant digits of resistance accuracy to be printedon the resistor should be in accordance with the specified toleranceTABLE 1 - VHP100 SERIES (1) maximum10 ppmWindowDeviation ppm+ 15+ 20+ 25+ 30+ 35+ 40+ 50 Temperature ( C)(+ 15 C to + 45 C): Typical TCR = ppm/ C, Ref. + 25 C+ 45 LSModelNumberVISHAYXXXXVHP100 STHLDate CodeWFront ViewRear ViewLead Material #22 AWG( Dia) Solder Coated CopperResistanceValue CodeToleranceSerial %XXXX10 Week01Ye a rLLEVHP100 Vishay foil Resistors Document Number: 63003 For any questions, contact: 23-Mar-103 Note(1)Load/life stability is considerably improved by reducing the temperature, power, or through in-house oriented (1)For lead spacing, specify VHP102 (60 ppm) or VHP103 (10 ppm).

8 (2)For non-standard requests, please contact application 2 - VHP100 SPECIFICATIONSR esistance Range100 to 150 k Tolerance at + 25 C % to % W at + 70 C (see figure 2)Load Life Stability (1)(for 2000 h) W at + 70 C; % (150 ppm) maximum W at + 125 C; % (150 ppm) maximum RShelf-Life Stability % (2 ppm) after 6 yearsThermal EMFDue to temperature difference between leadsDue to self-heating at V/ C0 to 1 VHigh Frequency OperationRise/decay timeInductance (L)Capacitance (C) ns for 1 k without H maximum, H pF maximum, pF typicalMaximum Working Voltage300 VVoltage Coefficient< ppm/VCurrent Noise< V (RMS)/V (- 40 dB)Hermeticity10-7 atmospheric cc/s maximumTABLE 3 - GLOBAL PART NUMBER INFORMATION (2)NEW GLOBAL PART NUMBER: Y007880K2500A9L (preferred part number format)DENOTES PRECISIONVALUECHARACTERISTICSYR = K = k 0 = standard9 = lead (Pb)-free1 to 999 = customPRODUCT CODE (1)RESISTANCE TOLERANCEPACKAGING0078 = VHP1004078 = VHP1015078 = VHP1026078 = VHP103V = %T = %Q = %A = %B = %C = %D = %F = %L = bulkFOR EXAMPLE: ABOVE GLOBAL ORDER Y0078 80K2500 A 9 L:TYPE: VHP100 VALUE: k ABSOLUTE TOLERANCE.

9 %TERMINATION: lead (Pb)-freePACKAGING: bulkHISTORICAL PART NUMBER: VHP100T 80K250 A B (will continue to be used)VHP100T80K250 ABMODELTERMINATIONRESISTANCE VALUETOLERANCEPACKAGINGVHP100 VHP101 VHP102 VHP103T = lead (Pb)-freeNone = tin/lead alloy k V = %T = %Q = %A = %B = %C = %D = %F = %B = bulk0788K250Y0A90L0 Vishay Precision Group, Disclaimer NoticeDocument No.: 63999 Revision: 15-Jul-2014 DisclaimerALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, VPG ), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product specifications do not expand or otherwise modify VPG s terms and conditions of purchase, including but not limited to, the warranty expressed makes no warranty, representation or guarantee other than as set forth in the terms and conditions of purchase.

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