VCS1625 Vishay Foil Resistors High Precision Bulk Metal(R) Foil Surface Mount Current Sensing Chip Resistor with TCR of 2 ppm/C and Load Life Stability of 0.02 % FEATURES 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. * Temperature coefficient of resistance (TCR): 2.0 ppm/C typical (- 55 C to + 125 C, + 25 C ref.) (see table 1) * Resistance range: 0.01 to 10 (for higher or lower 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. 1.2345 vs. 1 ) * Tolerance: to 0.1 % * Load life stability: 0.02 % at 70 C, 2000 h at rated power * Electrostatic discharge (ESD) up to 25 000 V * Short time overload 0.005 % * Non inductive, non capacitive design * Power rating: 0.5 W at + 70 C (figure 1) or 5 A, whichever is lower * Thermal EMF: 0.05 V/C typical * Non hot spot design * Current noise: < - 40 dB * Rise time: 1 ns effectively no ringing * Voltage coefficient: < 0.1 ppm/V * Non inductive: < 0.08 H * For better performances please review VCS1625Z (Z-foil) datasheet TERMINATIONS Percent of Rated Power FIGURE 1 - POWER DERATING CURVE (1) * Two lead (Pb)-free options are available: gold plated or tin plated * Tin/lead plated + 70 C - 55 C 100 APPLICATIONS 75 50 25 0 - 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 Ambient Temperature (C) Note (1) Power rating at + 70 C: 0.5 W on FR4 PCB * * * * * * * * * * Electrical 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 () TOLERANCE TYPICAL TCR > 2R000 to 10R000 0.2 %, 0.5 %, 1 % 2 ppm/C MAXIMUM TCR 5 ppm/C > 0R500 to 2R000 0.5 %, 1 % 2 ppm/C 10 ppm/C > 0R100 to 0R500 1% 2 ppm/C 15 ppm/C > 0R050 to 0R100 1% 2 ppm/C 20 ppm/C > 0R030 to 0R050 1% 2 ppm/C 30 ppm/C > 0R010 to 0R030 1% 2 ppm/C 50 ppm/C * Pb containing materials are not RoHS compliant, exemptions may apply Document Number: 63023 Revision: 23-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 1 VCS1625 Vishay Foil Resistors Mounting Pads (4) W A I1 E1 I2 E2 0.200 (5.08) L B 0.070 (1.78) FIGURE 2 - DIMENSIONS in Inches (Millimeters) 0.070 (1.78) H Top View 0.260 (6.60) Bottom View Solder Pad Layout INCHES MILLIMETERS L 0.250 0.010 6.35 0.25 H 0.160 0.010 4.06 0.25 W 0.040 maximum 1.02 maximum A 0.080 0.005 2.03 0.13 B 0.040 0.010 1.02 0.25 FIGURE 1 - TRIMMING TO VALUES (Conceptual Illustration) FIGURE 4 - TYPICAL TCR CURVE + 150 + 100 Current Path Before Trimming Interloop Capacitance Reduction in Series Current Path After Trimming Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance Mutual Inductance Reduction due to Opposing Current in Adjacent Lines + 50 R 2 ppm/C (+ 25 C reference) 0 R (ppm) - 50 - 100 - 150 - 200 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 Ambient Temperature (C) Note: Foil shown in black, etched spaces in white TABLE 2 - PERFORMANCE SPECIFICATIONS MIL-PRF-55342 R LIMITS TYPICAL R LIMITS MAXIMUM R LIMITS Thermal Shock 5 x (- 65 C to + 150 C) 0.10 % 0.005 % (50 ppm) 0.01 % (100 ppm) Low Temperature Operation 0.10 % 0.005 % (50 ppm) 0.01 % (100 ppm) Short Time Overload 0.10 % 0.005 % (50 ppm) 0.02 % (200 ppm) High Temperature Exposure 0.10 % 0.01 % (100 ppm) 0.02 % (200 ppm) Resistance to Soldering Heat 0.2 % 0.01 % (100 ppm) 0.03 % (300 ppm) Moisture Resistance 0.20 % 0.01 % (100 ppm) 0.03 % (300 ppm) Load Life 2000 h at 70 C: Rated Power On Ceramic PCB 0.5 % 0.02 % (200 ppm) 0.04 % (400 ppm) TEST Note * Measurement error 0.001R www.foilresistors.com 2 For any questions, contact: foil@vishaypg.com Document Number: 63023 Revision: 23-Mar-10 VCS1625 Vishay Foil Resistors TABLE 3 - GLOBAL PART NUMBER INFORMATION NEW GLOBAL PART NUMBER: Y08501R50500D9L (preferred part number format) DENOTES PRECISION VALUE AER (1) Y R= 0 = standard part, tin/lead termination 9 = standard part, lead (Pb)-free termination 129 = gold plated 1 to 999 = custom Y 0 8 5 PRODUCT CODE 0 1 R 5 0 5 0 0 D RESISTANCE TOLERANCE 0850 = VCS1625 B E D F G J K 9 W PACKAGING W = waffle pack R = tape and reel = 0.1 % = 0.2 % = 0.5 % = 1.0 % = 2.0 % = 5.0 % = 10.0 % 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 1R50500 TCR2 D S W MODEL OHMIC VALUE TEMPERATURE COEFFICIENT CHARACTERISTIC RESISTANCE TOLERANCE TERMINATION PACKAGING VCS1625 1.505 S = lead (Pb)-free B = tin/lead G = gold plated W = waffle pack T = tape and reel B E D F G J K = 0.1 % = 0.2 % = 0.5 % = 1.0 % = 2.0 % = 5.0 % = 10.0 % Note (1) For non-standard requests or additional values, please contact application engineering. Document Number: 63023 Revision: 23-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 3 Legal Disclaimer Notice Vishay Precision Group Disclaimer All product specifications and data are subject to change without notice. Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay Precision Group"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay Precision Group 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 Precision Group'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 Precision Group. 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 Precision Group products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay Precision Group for any damages arising or resulting from such use or sale. Please contact authorized Vishay Precision Group 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: 63999 Revision: 22-Feb-10 www.vishaypg.com 1