HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors 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) 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) INTRODUCTION Power coefficient R due to self heating: 5 ppm at rated power with the Z-Foil technology The Z-Foil based oil filled, hermetically sealed HZ Series Tolerance: to 0.001 % (10 ppm) resistors represent an industry breakthrough. The hermetic sealing eliminates the ingress of moisture and oxygen, while Load life stability to 0.002 % (20 ppm) at 25 C, 2000 h at rated power the oil acts as a thermal conductor, thus eliminating Load life stability, can be considerably improved long-term degradation elements of unsealed resistors, while through in-house stabilization at the same time allowing the device to accept short periods Shelf life stability: 2 ppm for at least 6 years of overload without degradation. (unaffected by humidity) The Z-Foil technology provides a significant reduction of the Electrostatic discharge (ESD) up to 25 000 V resistive components, sensitivity to ambient temperature Power rating: 0.3 W to 2.5 W at + 25 C (depending on variations (TCR) and applied power changes (PCR). When model - see table 2) combined with the hermetic sealing and oil filling, the Non-inductive, non-capacitive design HZ Series resistors become the most precise and stable Non hot spot design resistors available. They are used as the most precise Rise time: 1 ns effectively no ringing secondary standards for ultra precision metrology. Current noise: 0.010 V /V of applied voltage (< - 40 dB) RMS Thermal EMF: 0.05 V/C typical 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 Voltage coefficient: < 0.1 ppm/V 2 ppm, these devices are virtually secondary standards that Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) can be carried in sets for daily or periodic calibration of Non-inductive: < 0.08 H factory measurement equipment. Terminal finish available: lead (Pb)-free or tin/lead alloy The HZ Series is available with laboratory and metrology Impervious to harmful environments - oil filled level precision and long-term stability with additional Prototype quantities available in just 5 working days in-house oriented processes such as: chip stabilization, or sooner. For more information, please contact special TCR plotting, additional treatments for ultra foil vishaypg.com stability and special post manufacturing operations For better performances (values, TCR, tolerance, stability), (PMO). (Please refer to the last page) please contact us TABLE 1 - TCR VS. RESISTANCE VALUE FIGURE 1 - SHELF LIFE - VHA518-11 12K9 VS. QHE TYPICAL TCR AND RESISTANCE VALUE MAX. SPREAD 1 () (- 55 C to + 125 C, + 25 C ref.) 0.9 (ppm/C) 0.8 0.7 100 to < 1M1 0.2 2 0.6 0.5 50 to < 100 0.2 3 0.4 0.3 5 to < 50 0.2 4 0.2 0.1 Note 0 For maximum TCR < 1 ppm/C, see VHP100 and contact - 0.1 0 100 200 300 400 500 600 700 800 900 1000 application engineering Time (Days) Document Number: 63120 For any questions, contact: foil vishaypg.com www.foilresistors.com Revision: 25-Mar-10 1 Resistance Change (ppm)HZ Series (Z-Foil) with Zero TCR Vishay Foil Resistors FIGURE 2 - TRIMMING TO VALUES (Conceptual Illustration) Interloop Current Path Capacitance Before Trimming Reduction in Series Current Path Mutual After Trimming Inductance Reduction due Trimming Process to Opposing Removes this Material Current in from Shorting Strip Area Adjacent Lines Changing Current Path and Increasing Resistance Note: Foil shown in black, etched spaces in white TABLE 2 - MODEL SELECTION RESISTANCE STANDARD RESISTANCE MAXIMUM POWER AVERAGE (3) MODEL CONSTRUCTION DIMENSIONS RANGE TOLERANCE PER RANGE WORKING RATING WEIGHT NUMBER BRIEF (2) () RANGE () TIGHTEST (%) VOLTAGE at + 25 C (g) INCHES mm W: 0.162 0.020 4.11 0.51 Oil-filled, tinned L: 0.415 0.020 10.54 0.51 10 to 66K 0.3 W copper leads, nickel H: 0.430 0.020** 10.92 0.51 VHP202Z 300 1.4 66K to 100K 0.2 W shell, kovar and LL: 1.000 0.125 25.4 3.18 (4) glass header LS: 0.150 0.010 3.81 0.25 ST: 0.095 max. 2.41 max. L: 0.625 0.031 15.88 0.79 10 to 66K 0.3 W VHA412Z 250 4.6 D: 0.375 0.031 9.53 0.79 66K to 100K 0.2 W LL: 1.000 min. 25.4 min. L: 1.000 0.031 25.4 0.79 5 to 120K 0.5 W VHA414Z 350 7.3 D: 0.375 0.031 9.53 0.79 > 120K to 200K 0.3 W LL: 1.000 min. 25.4 min. (1) 1K to 0.001 L: 0.625 0.031 15.88 0.79 5 to 180K 0.75 W 500 to < 1K 0.0025 VHA512Z* 350 6.3 D: 0.500 0.031 12.7 0.79 180K to 300K 0.4 W 50 to < 500 0.005 LL: 1.000 min. 25.4 min. 30 to < 50 0.01 5 to 240K 1.0 W VHA516-4Z* 20 to < 30 0.02 Oil-filled, > 240K to 400K 0.5 W 10 to < 20 0.05 L: 1.000 0.031 25.4 0.79 tinned copper 5 to 300K 1.25 W VHA516-5Z* 5 to < 10 0.1 500 9.2 D: 0.500 0.031 12.7 0.79 leads, tinned brass > 300K to 500K 0.6 W LL: 1.000 min. 25.4 min. shell, kovar and 5 to 360K 1.5 W VHA516-6Z* glass end bells > 360K to 600K 0.7 W VHA518-7Z* 5 to 420K 1.75 W > 420K to 700K 0.8 W VHA518-8Z* 5 to 480K 2.0 W > 480K to 800K 0.9 W L: 1.500 0.031 38.1 0.79 VHA518-9Z* 5 to 540K 2.25 W 600 13.5 D: 0.500 0.031 12.7 0.79 > 540K to 900K 1.0 W LL: 1.000 min. 25.4 min. VHA518-10Z* 5 to 600K 2.5 W > 600K to 1.0M 1.1 W VHA518-11Z* 5 to 660K 2.5 W > 660K to 1.1M 1.2 W Notes: *Available in a 4-lead terminal **0.375 H available - See next page for numbered footnotes FIGURE 3 - TYPICAL RESISTANCE/ FIGURE 4 - POWER DERATING CURVE TEMPERATURE CURVE TCR Chord Slopes for Different Temperature Ranges + 500 - 55 C + 400 + 100 + 300 + 75 + 200 + 100 R + 50 0 R (ppm) - 100 0.05 ppm/C + 25 - 200 - 0.1 ppm/C 0.1 ppm/C - 300 0 0.14 ppm/C - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 - 400 - 0.16 ppm/C 0.2 ppm/C Ambient Temperature (C) - 500 - 55 - 25 0 + 25 + 60 + 75 + 100 + 125 Ambient Temperature (C) www.foilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63120 2 Revision: 25-Mar-10 Percent of Rated Power