VHP202Z VISHAY | Alldatasheet
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New Generation of Secondary Standards Hermetically Sealed Construction Ultra High Precision Z-Foil Technology Resistors with TCR of ± 0.2 ppm/°C, Tolerance of ± 0.001 % and Load Life Stability of ± 0.002 % (Metrology, Laboratory, Instrumentation, Industrial) HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors Document Number: 63120 For any questions, contact: foil@vishaypg.com www.foilresistors.com Revision: 25-Mar-10 1 INTRODUCTION The Z-Foil based oil filled, hermetically sealed HZ Series resistors represent an indust ry breakthrough. The hermetic sealing eliminates the ingress of moisture and oxygen, while the oil acts as a thermal co nductor, thus eliminating long-term degradation elements of unsealed resistors, while at the same time allowing the device to accept short periods of overload without degradation. The Z-Foil technology provides a significant reduction of the resistive components, sensitiv ity to ambient temperature variations (TCR) and applied power changes (PCR). When combined with the hermetic sealing and oil filling, the HZ Series resistors become the most precise and stable resistors available . They are used as the most precise secondary standards for ultra precision metrology. With accuracies of ± 0.001 % (10 ppm) and a resistance range from 5 to 1.1 M and long term shelf life of less than 2 ppm, these devices are virtually secondary standards that can be carried in sets for daily or periodic calibration of factory measurement equipment. The HZ Series is available with laboratory and metrology level precision and long-term stability with additional in-house oriented processes such as: chip stabilization, special TCR plotti ng, additional tr eatments for ultra stability and special post manufacturing operations (PMO). (Please refer to the last page) Note
- For maximum TCR < 1 ppm/°C, see VHP100 and contact application engineering
FEATURES
Temperature coefficient of resistance (TCR): ± 0.2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.). For ultra high performances (instrumentation and metrology) please refer to the last page Resistance range: 5 to 1.1 M (higher or lower values of resistance available) 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) Power coefficient “R due to self heating”: 5 ppm at rated power with the Z-Foil technology Tolerance: to ± 0.001 % (10 ppm) Load life stability to ± 0.002 % (20 ppm) at 25 °C, 2000 h at rated power Load life stability, can be considerably improved through in-house stabilization Shelf life stability: 2 ppm for at least 6 years (unaffected by humidity) Electrostatic discharge (ESD) up to 25 000 V Power rating: 0.3 W to 2.5 W at + 25 °C (depending on model - see table 2) Non-inductive, non-capacitive design Non hot spot design Rise time: 1 ns effectively no ringing Current noise: 0.010 µV RMS/V of applied voltage (< - 40 dB) Thermal EMF: 0.05 µV/°C typical Voltage coefficient: < 0.1 ppm/V Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) Non-inductive: < 0.08 µH Terminal finish available: lead (Pb)-free or tin/lead alloy Impervious to harmful environments - oil filled Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com For better performances (values, TCR, tolerance, stability), please contact us TABLE 1 - TCR VS. RESISTANCE VALUE RESISTANCE VALUE () TYPICAL TCR AND MAX. SPREAD (ppm/°C) 100 to < 1M1 ± 0.2 ± 2 50 to < 100 ± 0.2 ± 3 5 to < 50 ± 0.2 ± 4 FIGURE 1 - SHELF LIFE - VHA518-11 12K9 VS. QHE Time (Days) Resistance Chan ge (ppm) 0 100 200 300 400 500 600 700 800 900 1000 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 - 0.1
HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63120
2 Revision: 25-Mar-10
Notes: *Available in a 4-lead terminal 0.375 H available - See next page for numbered footnotes FIGURE 2 - TRIMMING TO VALUES (Conceptual Illustration) TABLE 2 - MODEL SELECTION MODEL NUMBER RESISTANCE RANGE () STANDARD RESISTANCE TOLERANCE PER RANGE MAXIMUM WORKING VOLTAGE (2) POWER RATING at + 25 °C AVERAGE WEIGHT (g) CONSTRUCTION BRIEF DIMENSIONS (3) RANGE () TIGHTEST (%) INCHES mm VHP202Z 10 to 66K 66K to 100K 1K to (1) 500 to < 1K 50 to < 500 30 to < 50 20 to < 30 10 to < 20 5 to < 10 ± 0.001 ± 0.0025 ± 0.005 ± 0.01 ± 0.02 ± 0.05 ± 0.1 300 0.3 W 0.2 W 1.4 Oil-filled, tinned copper leads, nickel shell, kovar and glass header W: 0.162 ± 0.020 L: 0.415 ± 0.020 H: 0.430 ± 0.020 LL: 1.000 ± 0.125 LS: 0.150 ± 0.010 (4) ST: 0.095 max. 4.11 ± 0.51 10.54 ± 0.51 10.92 ± 0.51 25.4 ± 3.18 3.81 ± 0.25 2.41 max. VHA412Z 10 to 66K 66K to 100K 250 0.3 W 0.2 W 4.6 Oil-filled, tinned copper leads, tinned brass shell, kovar and glass end bells L: 0.625 ± 0.031 D: 0.375 ± 0.031 LL: 1.000 min. 15.88 ± 0.79 9.53 ± 0.79 25.4 min. VHA414Z 5 to 120K > 120K to 200K 350 0.5 W 0.3 W 7.3 L: 1.000 ± 0.031 D: 0.375 ± 0.031 LL: 1.000 min. 25.4 ± 0.79 9.53 ± 0.79 25.4 min. VHA512Z* 5 to 180K 180K to 300K 350 0.75 W 0.4 W 6.3 L: 0.625 ± 0.031 D: 0.500 ± 0.031 LL: 1.000 min. 15.88 ± 0.79 12.7 ± 0.79 25.4 min. VHA516-4Z* VHA516-5Z* VHA516-6Z* 5 to 240K > 240K to 400K 5 to 300K > 300K to 500K 5 to 360K > 360K to 600K 500 1.0 W 0.5 W 1.25 W 0.6 W 1.5 W 0.7 W 9.2 L: 1.000 ± 0.031 D: 0.500 ± 0.031 LL: 1.000 min. 25.4 ± 0.79 12.7 ± 0.79 25.4 min. VHA518-7Z* VHA518-8Z* VHA518-9Z* VHA518-10Z* VHA518-11Z* 5 to 420K > 420K to 700K 5 to 480K > 480K to 800K 5 to 540K > 540K to 900K 5 to 600K > 600K to 1.0M 5 to 660K > 660K to 1.1M 600 1.75 W 0.8 W 2.0 W 0.9 W 2.25 W 1.0 W 2.5 W 1.1 W 2.5 W 1.2 W 13.5 L: 1.500 ± 0.031 D: 0.500 ± 0.031 LL: 1.000 min. 38.1 ± 0.79 12.7 ± 0.79 25.4 min. Note: Foil shown in black, etched spaces in white Mutual Inductance Reduction due to Opposing Current in Adjacent Lines Current Path Before Trimming Interloop Capacitance Reduction in Series Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance Current Path After Trimming FIGURE 3 - TYPICAL RESISTANCE/ TEMPERATURE CURVE + 500 + 200 + 100 - 100 - 200 - 300 - 500 - 55 - 25 + 25 + 60 + 75 + 100 + 125 Ambient Temperature (°C) ΔR R (ppm) 0.05 ppm/°C - 0.1 ppm/°C 0.1 ppm/°C 0.14 ppm/°C 0.2 ppm/°C- 0.16 ppm/°C- 400 + 300 + 400 TCR Chord Slopes for Different Temperature Ranges FIGURE 4 - POWER DERATING CURVE + 100 + 75 + 50 + 25 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 Percent of Rated Power - 55 °C Ambient Temperature (°C)
HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors Document Number: 63120 For any questions, contact: foil@vishaypg.com www.foilresistors.com Revision: 25-Mar-10 3 Notes (1) Upper end of resistance range varies with m odel selected (i.e. VHP202Z; the range is to 100 k ; VHA518-10Z, the range is to 1.0 M ) per table 2 (2) Not to exceed power rating of resistor (3) Insulating sleeve - a special case insulati ng plastic sleeve is available on VHAZ mode ls - specify letter “P” as a suffix to mo del number (i.e. VHA412ZP) (4) 0.200" (5.08 mm) lead spacing available - specify VHP202ZJ (5) Inductance (L) due mainly to the leads (6) The resolution limit of existing test equipment (within measurement capability of the equipment, or “essentially zero”) (7) µV/°C relates to EMF due to lead temperature difference and µV/W due to power applied to the resistor (8) Load life R max. can be reduced through in-house oriented processes (PMO) POST MANUFACTURING OPERATIONS OR PMO FOR IMPROVED END OF LIFE 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 tem perature cycling are the three PMO exercises that do the most to remove the anomalies down the road. Bulk Metal Foil resistors are inherently stable as manufactured. These PMO exercises are only of value on Bulk Metal Foil resistors and t hey improve the performance by amounts that are small but significant when compared to the very tight tolerances. Us ers are encouraged to contact Foil applications engineering for assistance in choosing the PMO operations that are right for their application. FIGURE 5 - STANDARD IMPRINTING AND DIMENSIONS Lead Material #22 AWG Round Solder Coated Copper ST W Rear View 100R01 0.01% XXXX LL Resistance Value Code Tolerance Serial Number LS VISHA Y XXXX VHP202Z H L Front View Model Number Date Code Week Year VISHA Y XXXX VHA412Z 100R01 0.005% D LL L Date Code Week Year Lead Material #22 AWG Round Solder Coated Copper Resistance Value Code Tolerance Model Number TABLE 3 - “H” SERIES SPECIFICATIONS Stability (8) Load life at 2000 h ± 0.002 % (20 ppm) at 25 °C at rated power Shelf life ± 2 ppm (0.0002 %) after at least 6 years Current Noise < 0.010 µV (RMS)/V of applied voltage (- 40 dB) High Frequency Operation Rise time 1.0 ns without ringing Inductance (L) (5) 0.1 µH maximum; 0.08 µH typical Capacitance (C) 1.0 pF maximum; 0.5 pF typical Voltage Coefficient < 0.1 ppm/V (6) Thermal EMF (7) 0.1 µV/°C maximum; 0.05 µV/°C typical; 1 µV/W maximum Hermeticity 10-7 atmospheric cc/s maximum
HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63120
4 Revision: 25-Mar-10
(1) For non-standard requests, please contact application engineering (2) 4-terminal construction of these types are available, please quote: TABLE 4 - GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y1750120K500V9L (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS YR = K = k M = M 0 = standard product, tin/lead termination 1 = with plastic sleeve, tin/lead termination 9 = standard product, lead (Pb)-free termination 19 = with plastic sleeve, lead (Pb)-free termination Other = custom PRODUCT CODE RESISTANCE TOLERANCE PACKAGING 6071 = VHP202Z 1748 = VHP202ZJ 1749 = VHA412Z 1751 = VHA414Z 1750 = VHA512Z 4725 = VHA512Z (4-terminals) 1752 = VHA516-4Z 4726 = VHA516-4Z (4-terminals) 1753 = VHA516-5Z 4727 = VHA516-5Z (4-terminals) 1754 = VHA516-6Z 4728 = VHA516-6Z (4-terminals) 1755 = VHA518-7Z 4729 = VHA518-7Z (4-terminals) 1756 = VHA518-8Z 4730 = VHA518-8Z (4-terminals) 1757 = VHA518-9Z 4731 = VHA518-9Z (4-terminals) 1758 = VHA518-10Z 4732 = VHA518-10Z (4-terminals) 1759 = VHA518-11Z 4733 = VHA518-11Z (4-terminals) S = ± 0.001 % U = ± 0.002 % X = ± 0.0025 % 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 FOR EXAMPLE: ABOVE GLOBAL ORDER Y1750 120K500 V 9 L: TYPE: VHA512Z VALUE: 120.5 k ABSOLUTE TOLERANCE: ± 0.005 % TERMINATION: lead (Pb)-free PACKAGING: bulk pack HISTORICAL PART NUMBER: VHA512ZT 120K50 V B (will continue to be used) VHA512Z T 120K50 V B MODEL TERMINATION PLASTIC SLEEVE OHMIC VALUE TOLERANCE PACKAGING VHP202Z VHP202ZJ VHA412Z VHA414Z VHA512Z (2) VHA516-4Z (2) VHA516-5Z (2) VHA516-6Z (2) VHA518-7Z (2) VHA518-8Z (2) VHA518-9Z (2) VHA518-10Z (2) VHA518-11Z (2) T = lead (Pb)-free None = tin/lead P = plastic sleeve None = standard 120K50 = 120.5 k S = ± 0.001 % U = ± 0.002 % X = ± 0.0025 % V = ± 0.005 % T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F = ± 1.0 % B = bulk pack 2-Terminal VHA512Z VHA516-4Z VHA516-5Z VHA516-6Z VHA518- 7Z VHA518-8Z VHA518-9Z VHA518-10Z VHA518-11Z 4-Terminal 302073Z 302074-4Z 302074-5Z 302074-6Z 302075-7Z 302075-8Z 302075-9Z 302075-10Z 302075-11Z 7501 0K5 2Y1 V90 L0
HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors Document Number: 63120 For any questions, contact: foil@vishaypg.com www.foilresistors.com Revision: 25-Mar-10 5 ULTRA HIGH PRECISION HERMETICALLY SEALED RESISTORS INTRODUCTION The response of Vishay's hermetically sealed resistors under variable conditions and st resses can be made better by additional in-house oriented processes (PMO). Processes such as short time overload, accelerated load life and temperature cycling produce enhanced levels of accuracy, stability and speed, offering immediate answers to many resistor applications curr ently believed unsolvable, and opens entirely new areas of design where the use of resistors had not been considered. APPLICATIONS INCLUDE Resistance standards Feedback devices for operational amplifiers Precision voltage dividers Meter multipliers Precision bridge resistors Decade voltage dividers See table 5 for the improvement to expect in hermetically sealed parts when calling for in-house oriented processes (PMO).
ORDERING INFORMATION
Resistors are built to your requirements. Send your schematic and electrical requi rements to the applications engineering department at foil@vishaypg.com. A unique part number will be assigned which defines all aspects of your resistor. TABLE 5 - EXAMPLES OF NON-STANDARD REQUIREMENTS TYPE VALUE TOLERANCE TCR REMARKSABSOLUTE MATCH ABSOLUTE TRACKING VHA518-11 Set of 10 Resistors (+ 20 °C to + 30 °C) 1 0.1 % 0.005 % 0.5 ppm/°C 0.5 ppm/°C with PMO VHA518-7 4-Terminal (+ 20 °C to + 30 °C) with PMO VHA518-7 4-Terminal Matched Pairs with PMO 1K 0.005 % 0.002 % 0.3 ppm/°C 0.3 ppm/°C 10K 0.001 % 0.002 % 0.3 ppm/°C 0.3 ppm/°C 100K 0.001 % 0.002 % 0.3 ppm/°C 0.3 ppm/°C VHA518 Set of 10 Resistors
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