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| VCS1625 Vishay Foil Resistors High Precision Foil Surface Mount Current Sensing Chip Resistors with TCR of 2 ppm/C and Load Life Stability of 0.02 % FEATURES * Temperature coefficient of resistance (TCR): Pb-free 2.0 ppm/C typical (- 55 C to + 125 C, Available + 25 C ref.) (see table 1) RoHS* * Tolerance: to 0.1 % COMPLIANT * Load life stability: 0.02 % at 70 C, 2000 h at rated power * Electrostatic discharge (ESD) above 25 000 V * Short time overload 0.005 % * Ohmic values: 0.01 to 10 (for higher or lower values please contact us) * Non inductive, non capacitive design * Power rating: 1 W at + 70 C (figure 1) * Current rating: 5 A maximum * Thermal EMF: 0.05 V/C typical * Non hot spot design * Current noise: < - 40 dB * Rise time: 1 ns without ringing * Voltage coefficient: < 0.1 ppm/V * Non inductive: < 0.08 H * For better performances please review VCS1625Z (Z-foil) data sheet Any value at any tolerance available within resistance range INTRODUCTION Model VCS1625 is a surface mount resistor designed with 4 pads for Kelvin connection. Utilizing Vishay Bulk Metal(R) foil as the resistance element, it provides performance capabilities far greater than other resistor technologies can supply in a product of comparable size. This small device dissipates heat almost entirely through the pads so surface mount users are encouraged to be generous with the board's pads and traces. Gold terminations are available on special order. Our application engineering department is available to advise and to make recommendations. For non standard technical requirements and special applications, please contact us. FIGURE 1 - POWER DERATING CURVE1) Percent of Rated Power - 55 C 100 75 50 25 0 - 75 TERMINATIONS * Two lead (Pb)-free options are available: gold plated or tin plated * Tin/lead plated + 70 C APPLICATIONS * * * * * * * * * * Electrical - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 Ambient Temperature (C) Note: 1. Power rating at + 70 C 1 W on alumina substrate 0.5 W on FR4 Schematic Automatic test equipment (ATE) I1 E1 Airborne (in heads-up display systems) High precision instrumentation R Electron beam recording equipment Electron microscopes E2 I2 Current sensing applications Forced balance electronic scales Applications that require superior frequency stability Military Medical TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE (- 55 C to + 125 C, + 25 Ref.) VALUE () > 2R000 to 10R000 > 0R500 to 2R000 > 0R100 to 0R500 > 0R050 to 0R100 > 0R030 to 0R050 > 0R010 to 0R030 TOLERANCE 0.2 %, 0.5 %, 1 % 0.5 %, 1 % 1% 1% 1% 1% TYPICAL TCR 2 ppm/C 2 ppm/C 2 ppm/C 2 ppm/C 2 ppm/C 2 ppm/C MAXIMUM TCR 5 ppm/C 10 ppm/C 15 ppm/C 20 ppm/C 30 ppm/C 50 ppm/C * Pb containing materials are not RoHS compliant, exemptions may apply www.vishay.com 1 For any questions, contact: foil@vishay.com Document Number: 63023 Revision: 19-Feb-08 VCS1625 High Precision Foil Surface Mount Current Sensing Chip Resistors with TCR of 2 ppm/C and Load Life Stability of 0.02 % FIGURE 2 - DIMENSIONS in inches (millimeters) Mounting Pads (4) I1 Vishay Foil Resistors 0.200 (5.08) W 0.070 (1.78) L A E1 B 0.070 (1.78) H I2 E2 Top View INCHES L H W A B 0.250 0.010 0.160 0.010 0.040 maximum 0.080 0.005 0.040 0.010 0.260 (6.60) Bottom View Solder Pad Layout MILLIMETERS 6.35 0.25 4.06 0.25 1.02 maximum 2.03 0.13 1.02 0.25 FIGURE 1 - TRIMMING TO VALUES (Conceptual Illustration) FIGURE 4 - TYPICAL TCR CURVE + 150 + 100 Interloop Capacitance Reduction in Series Current Path Before Trimming Current Path After Trimming Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance + 50 R 2 ppm/C (+ 25 C reference) 0 R (ppm) - 50 - 100 - 150 - 200 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 Mutual Inductance Reduction due to Opposing Current in Adjacent Lines Ambient Temperature (C) Note: Foil shown in black, etched spaces in white TABLE 2 - PERFORMANCE SPECIFICATIONS TEST Thermal Shock 5 x (- 65 C to + 150 C) Low Temperature Operation Short Time Overload High Temperature Exposure Resistance to Soldering Heat Moisture Resistance Load Life 2000 h at 70 C: Rated Power On Ceramic PCB Note * Measurement error 0.001 R MIL-PRF-55342 R LIMITS 0.10 % 0.10 % 0.10 % 0.10 % 0.2 % 0.20 % 0.5 % TYPICAL R LIMITS 0.005 % (50 ppm) 0.005 % (50 ppm) 0.005 % (50 ppm) 0.01 % (100 ppm) 0.01 % (100 ppm) 0.01 % (100 ppm) 0.02 % (200 ppm) MAXIMUM R LIMITS 0.01 % (100 ppm) 0.01 % (100 ppm) 0.02 % (200 ppm) 0.02 % (200 ppm) 0.03 % (300 ppm) 0.03 % (300 ppm) 0.04 % (400 ppm) Document Number: 63023 Revision: 19-Feb-08 For any questions, contact: foil@vishay.com www.vishay.com 2 VCS1625 Vishay Foil Resistors High Precision Foil Surface Mount Current Sensing Chip Resistors with TCR of 2 ppm/C and Load Life Stability of 0.02 % TABLE 3 - GLOBAL PART NUMBER INFORMATION NEW GLOBAL PART NUMBER: Y08501R50500D9L (preferred part number format) DENOTES PRECISION Y VALUE R= AER* 0 = standard part, tin/lead termination 9 = standard part, lead (Pb)-free termination 129 = gold plated 1 - 999 = custom Y 0 8 5 0 1 R 5 0 5 0 0 D 9 W PRODUCT CODE 0850 = VCS1625 RESISTANCE TOLERANCE B E D F G J K = 0.1 % = 0.2 % = 0.5 % = 1.0 % = 2.0 % = 5.0 % = 10.0 % PACKAGING W = waffle pack R = tape and reel FOR EXAMPLE: ABOVE GLOBAL ORDER Y0850 1R50500 D 9 W: TYPE: VCS1625 VALUES: 1.505 ABSOLUTE TOLERANCE: 0.5 % TERMINATION: tin plated (lead (Pb)-free) PACKAGING: bulk pack HISTORICAL PART NUMBER: VCS1625 1R5050 TCR2 D S W (will continue to be used) VCS1625 MODEL VCS1625 1R50500 OHMIC VALUE 1.505 TCR2 TEMPERATURE COEFFICIENT CHARACTERISTIC D RESISTANCE TOLERANCE B E D F G J K = 0.1 % = 0.2 % = 0.5 % = 1.0 % = 2.0 % = 5.0 % = 10.0 % S TERMINATION S = lead (Pb)-free B = tin/lead G = gold plated W PACKAGING W = waffle pack T = tape and reel Note * For non-standard requests or additional values, please contact application engineering. www.vishay.com 3 For any questions, contact: foil@vishay.com Document Number: 63023 Revision: 19-Feb-08 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1 |
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