VSMP Series (0603, 0805, 1206, 1506, 2010, 2018, 2512) (Z-Foil)

Transcription

1 VSMP Series (63, 85, 126, 156, 21, 218, 2512) Ultra High Precision Foil Wraparound Surface Mount Chip Resistor with TCR of ±.5 ppm/ C and Power Coefficient of 5 ppm at Rated Power and Load Life Stability of ±.5 % (5 ppm) Top View (for date code print specification please refer to table 2) INTRODUCTION VSMP Series is the industry s first device to provide high rated power and excellent load life stability along with extremely low TCR all in one resistor. One of the most important parameters influencing stability is the Temperature Coefficient of Resistance (TCR). Although the TCR of foil resistors is considered extremely low, this characteristic has been further refined over the years. The VSMP Series utilizes ultra high precision Bulk Metal Z-Foil. The Z-Foil technology provides a significant reduction of the resistive element s sensitivity to ambient temperature variations (TCR) and to self heating when power is applied (Power Coefficient of Resistance, or PCR). Along with the inherently low PCR and TCR, Z-Foil technology also provides remarkably improved load life stability, low noise and tight tolerances. The VSMP resistor has a full wraparound termination which assures secure contact during the manufacturing process, as well as providing stability during multiple thermal cyclings. Vishay Foil Resistors' (VFR) application engineering department is available to advise and make recommendations. For non-standard technical requirements and special applications, please contact VFR using the address in the footer below. FEATURES Temperature coefficient of resistance (TCR):.5 ppm/ C typical ( C to + 6 C).2 ppm/ C typical (- 55 C to C, + 25 C ref.) Resistance tolerance: to ±.1 % Power coefficient R due to self heating : 5 ppm at rated power Power rating: to 75 mw at + 7 C (see table 3) Load life stability: to ±.5 % at 7 C, 2 h at rated power Resistance range: 5 to 125 k (for lower or higher values, please contact us) Vishay Foil resistors are not restricted to standard values, we can supply specific as required values at no extra cost or delivery (e.g. 1K2345 vs. 1K) Thermal stabilization time < 1 s (nominal value achieved within 1 ppm of steady state value) Electrostatic discharge (ESD) at least to 25 kv Short time overload:.5 % Non inductive, non capacitive design Rise time: 1 ns effectively no ringing Current noise:.1 µv RMS /V of applied voltage (< - 4 db) Voltage coefficient <.1 ppm/v Non inductive: <.8 µh Non hot spot design Terminal finishes available: lead (Pb)-free, tin/lead alloy Matched sets are available on request Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vpgsensors.com TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE (1) (- 55 C to C, + 25 C Ref.) RESISTANCE VALUE ( ) TOLERANCE (%) TYPICAL TCR AND MAX. SPREAD (ppm/ C) 25 to 125K ±.1 ±.2 ± to < 25 ±.2 ±.2 ± to < 1 ±.5 ±.2 ± to < 5 ±.1 ±.2 ± to < 25 ±.25 ±.2 ± to < 1 ±.5 ±.2 ± 7.8 (1) For tighter performances and non-standard values lower than 5 and above 125K, please contact VFR s application engineering using the addresses in the footer below FIGURE 1 - POWER DERATING CURVE Percent of Rated Power C + 7 C Ambient Temperature ( C) * Pb containing terminations are not RoHS compliant; exemptions may apply Document Number: 636 For any questions, contact Revision: 3-Mar-15 foil@vpgsensors.com 1

2 VSMP Series (63, 85, 126, 156, 21, 218, FIGURE 2 - TRIMMING TO VALUES (Conceptual Illustration) Interloop Capacitance Reduction in Series Mutual Inductance Reduction due to Change in Current Direction Current Path Before Trimming Current Path After Trimming Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance : Foil shown in black, etched spaces in white FIGURE 3 - TYPICAL RESISTANCE/ TEMPERATURE CURVE ΔR R (ppm) ppm/ C -.1 ppm/ C.1 ppm/ C.14 ppm/ C -.16 ppm/ C.2 ppm/ C Ambient Temperature ( C) and TCR Chord Slopes for Different Temperature Ranges The TCR values for < 1 are influenced by the termination composition and result in deviation from this curve TABLE 2 - DIMENSIONS AND LAND PATTERN in Inches (Millimeters) CHIP SIZE Date Code 2 (Year/Week) T L ±.5 (.13) Top View D W ±.5 (.13) L W THICKNESS MAXIMUM D ±.5 (.13) Recommended Land Pattern G Z X Footprint Z (1) G (1) X (1) (1.6).32 (.81).25 (.64).11 (.28).12 (2.59).31 (.78).31(.78) 85.8 (2.3).5 (1.27).25 (.64).15 (.38).122 (3.1).28 (.71).5 (1.27) (3.2).62 (1.57).25 (.64).2 (.51).175 (4.45).59 (1.5).71 (1.8) (3.81).62 (1.57).25 (.64).2 (.51).199 (5.5).83 (2.11).71 (1.8) (5.3).97 (2.46).25 (.64).25 (.64).247 (6.27).115 (2.92).13 (2.62) (5.18).184 (4.67).25 (.64).18 (.46).248 (6.3).146 (3.71).184 (4.67) (6.32).127 (3.23).25 (.64).32 (.81).291 (7.39).15 (3.81).127 (3.23) (1) Land Pattern Dimensions are per IPC-7351A (2) The date code printing applies to all resistor sizes except for 63 TABLE 3 - SPECIFICATIONS CHIP SIZE RATED POWER (mw) at + 7 C MAX. WORKING VOLTAGE ( P R) RESISTANCE RANGE ( )* MAXIMUM WEIGHT (mg) V 1 to 4K V 5 to 8K V 5 to 25K V 5 to 3K V 5 to 7K V 5 to 2K V 5 to 125K 4 * For non standard values please contact VFR s application engineering using the addresses in the footer below. TABLE 4 - LOAD LIFE STABILITY (+ 7 C for 2 h) CHIP SIZE MAXIMUM R LIMITS 63 ±.5 % at 5 mw ±.1 % at 1 mw 85 ±.5 % at 1 mw ±.1 % at 2 mw 126, 156 ±.5 % at 15 mw ±.1 % at 3 mw 21 ±.5 % at 2 mw ±.1 % at 5 mw 218 ±.5 % at 5 mw ±.1 % at 75 mw 2512 ±.5 % at 5 mw ±.1 % at 75 mw For any questions, contact Document Number: foil@vpgsensors.com Revision: 3-Mar-15

3 VSMP Series (63, 85, 126, 156, 21, 218, 2512) TABLE 5 - PERFORMANCES TEST OR CONDITIONS MIL-PRF TYPICAL MAXIMUM CHARACTERISTIC E R LIMITS R LIMITS R LIMITS (1) Thermal Shock, 1 x (- 65 C to + 15 C) ±.1 % ±.5 % (5 ppm) ±.1 % (1 ppm) Low Temperature Operation, - 65 C, 45 min at P nom ±.1 % ±.5 % (5 ppm) ±.1 % (1 ppm) Short Time Overload, 6.25 x Rated Power, 5 s ±.1 % ±.5 % (5 ppm) ±.1 % (1 ppm) High Temperature Exposure, + 15 C, 1 h ±.1 % ±.1 % (1 ppm) ±.2 % (2 ppm) Resistance to Soldering Heat ±.2 % ±.5 % (5 ppm) ±.1 % (1 ppm) Moisture Resistance ±.2 % ±.5 % (5 ppm) ±.2 % (2 ppm) Load Life Stability + 7 C for 2 h at Rated Power ±.5 % ±.5 % (5 ppm) ±.1 % (1 ppm) (1) As shown +.1 to allow for measurement errors at low values FIGURE 4 - RECOMMENDED MOUNTING s (1) IR and vapor phase reflow are recommended. (2) Avoid the use of cleaning agents which could attack epoxy resins, which form part of the resistor construction (3) Vacuum pick up is recommended for handling (4) If the use of a soldering iron becomes necessary, precautionary measures should be taken to avoid any possible damage / overheating of the resistor * Recommendation: The solder fillet profile should be such as to avoid running over the top metallization * FIGURE 5-1 CYCLE THERMAL SHOCK - 65 C TO 15 C, 1 UNITS EACH VALUE FIGURE 6 - LOAD LIFE TEST FOR 1, +7 C; VSMP 126, N= ΔR/R (ppm) R 1K 5K R (ppm) R 1K 12K CRYOGENIC TEST Different expansion/contraction rates of composite materials in resistors may induce discontinuities during temperature excursions that are not evident at temperature extremes, making an unreliable resistor appear normal. A good resistor must also return to its initial value with no resistance drift. In this demo, a VFR VSMP85 precision resistor is monitored through the range of +25 C, down to -196 C and back up to +25 C. Results confirm the VSMP85 exhibits only 5 ppm/ C TCR, experiences no discontinuities, and returns to its exact same starting value, showing absolutely no change in resistance (< 1 ppm measurement accuracy). -5 Time (hrs) FIGURE 7 - PRECISION RESISTOR IN CRYOGENIC CONDITIONS - ONLY 5 PPM/ C (PRODUCT DEMO) Document Number: 636 For any questions, contact Revision: 3-Mar-15 foil@vpgsensors.com 3

4 VSMP Series (63, 85, 126, 156, 21, 218, PULSE TEST TEST DESCRIPTION All parts are baked at +125 C for 1 hour and allowed to cool at room temperature for 1 hour, prior to testing. By using an electrolytic.1µf capacitor charged to 12 VDC, a single pulse was performed on 3 units of 126, 1 k of Surface Mount Vishay Foil resistor and Thin Film resistor. The units were allowed time to cool down, after which the resistance measurements were taken and displayed in ppm deviation from the initial reading. TEST RESULTS FIGURE 8 - PULSE TEST DESCRIPTION Catastrophic Damage - occurs when the ESD event causes the device to immediately stop functioning. This may occur after one or a number of ESD events with diverse causes, such as human body discharge or the mere presence of an electrostatic field. Latent Damage - occurs when the ESD event causes moderate damage to the device, which is not noticeable, as the device appears to be functioning correctly. However, the load life of the device has been dramatically reduced, and further degradation caused by operating stresses may cause the device to fail during service. Latent damage is the source for greatest concern, since it is very difficult to detect by re-measurement or by visual inspection, because damage may have occurred under the external coating. TEST DESCRIPTION 2 By using an electrolytic 5 pf capacitor charged up to 45 V, pulses were performed on 1 units of 126, 1 k of three different Surface Mount Chip Resistors technologies, with an initial voltage spike of 25 V (Figure 1). The units were allowed time to cool down, after which the resistance measurements were taken and displayed in ppm deviation from the initial readings. Readings were then taken in 5 V increments up to 45 V. FIGURE 9 - PULSE TEST RESULTS AT 12 VDC* FIGURE 1 - ESD TEST DESCRIPTION 25 V to 45 V 1 MΩ ΔR (ppm) Thin Film Bulk Metal Foil Size: 126 Value: 1K n = 3 5 pf Rx Resistor # : Average of 3 units yielded deviation of ppm of the Thin Film vs 14 ppm for the Bulk Metal Foil * : Average of 3 units yielded deviation of 3,723 ppm of the Thin Film vs. -14 ppm for the Bulk Metal Foil ELECTROSTATIC DISCHARGE (ESD) ESD can be categorized into three types of damages: Parametric Failure - occurs when the ESD event alters one or more device parameters (resistance in the case of resistors), causing it to shift from its required tolerance. This failure does not directly pertain to functionality; thus a parametric failure may be present while the device is still functional. DMM TABLE 6 - ESD TEST RESULTS (AVERAGE OF 1 UNITS) VOLTS R (%) THICK FILM THIN FILM FOIL < < OPEN < OPEN < OPEN <.5 For any questions, contact Document Number: foil@vpgsensors.com Revision: 3-Mar-15

5 VSMP Series (63, 85, 126, 156, 21, 218, 2512) TABLE 7- GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y162612K756T9R (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS Y R = K = k = standard 9 = lead (Pb)-free 1 to 999 = custom Y K T 9 R PRODUCT CODE RESISTANCE TOLERANCE PACKAGING 1636 = 1624 = VSMP = VSMP = VSMP = VSMP = VSMP = VSMP2512 T = ±.1 % Q = ±.2 % A = ±.5 % B = ±.1 % C = ±.25 % D = ±.5 % F = ± 1. % FOR EXAMPLE: ABOVE GLOBAL ORDER Y K756 T 9 R: TYPE: VSMP156 VALUES: k ABSOLUTE TOLERANCE:.1 % TERMINATION: lead (Pb)-free PACKAGING: tape and reel HISTORICAL PART NUMBER: VSMP156 12K756 TCR.2 T S T (will continue to be used) R = tape and reel W = waffle pack VSMP156 12K756 TCR.2 T S T MODEL VSMP85 VSMP126 VSMP156 VSMP21 VSMP218 VSMP2512 RESISTANCE VALUE TCR CHARACTERISTICS k T = ±.1 % Q = ±.2 % A = ±.5 % B = ±.1 % C = ±.25 % D = ±.5 % F = ± 1. % TOLERANCE TERMINATION PACKAGING S = lead (Pb)-free B = tin/lead T = tape and reel W = waffle pack (1) For non-standard requests, please contact application engineering. PRECISION CENTER Precision centers are located around the world to provide local, short run, quick delivery of Vishay Bulk Metal Foil resistors. Unique to Vishay Foil Resistors (VFR) is the ability to provide any value to any tolerance. The precision centers can ship small quantities in five days or less. Why do we have authorized local manufacturing or precision centers? Because we have no standard values and each resistor is trimmed to the precise value ordered. The unique chain of Precision Centers brings these precise values as close as possible to the circuit designers in the shortest time possible. For your local Precision Center please click here. Document Number: 636 For any questions, contact Revision: 3-Mar-15 foil@vpgsensors.com 5

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