CSM3637F (R) Bulk Metal Foil Technology Precision, Current BulkMetal(R) FoilTechnology HighPrecision,High Current Sensing,Power SurfaceSensing, MountResistor Power Surface Mount Resistor with Rated Power up to 3 W and TCR 10 ppm/C FEATURES AR Y * Temperature coefficient of resistance (TCR): 10 ppm/C max. (-55C to +125C, +25C ref.) For tighter TCR please contact us. * Power rating: 3 W * Resistance tolerance: to 0.1% * Resistance range: 20 m to 200 m * Load-life stability: to 0.05% typical (70C, 2000 h at rated power) * Short-time overload: 0.02% typical * Power coefficient of resistance (PCR), "R due to self heating": 5 ppm/W at rated power * Electrostatic discharge (ESD): at least to 25 kV * Solderable terminations * Terminal finish available: lead (Pb)-free, tin/lead alloy * Quick prototype quantities available; please contact foil@vpgsensors.com Top View Bottom View B C R I I A D V Zin ~ = IN Four terminal (Kelvin) design: allows for precise and accurate measurements. Figure 1--Power Derating Curve EL I M Model CSM3637F is a surface mount chip resistor designed with 4 pads for Kelvin connection. Utilizing Bulk Metal(R) Foil as the resistance element, it provides enhanced characteristic capabilities resulting in superior performance when compared with other resistor technologies. The unique combination of Z Foil technology along with the designed 4 pads lead frame configuration results in significant reduction of the component's sensitivity to applied power changes such as power coefficient of resistance (PCR) and thermal resistance. + 70 C 100 Rated Power (%) INTRODUCTION 80 60 40 20 0 -65 -50 -25 0 25 50 75 100 Ambient Temperature (C) 125 150 170 Table 1--Specifications Parameter Value Resistance range 20 m to 200 m(1) Power rating at 70C 2 W: 20 m to <50 m; 3 W: 50 m to 200 m Maximum current(2) Tolerance Temperature coefficient maximum (-55C to +125C, +25C Ref.) 10 A 0.1 15 ppm/C, R <100 m; 10 ppm/C(3) R 100 m Operating temperature range PR Maximum working voltage Weight (maximum) -65C to +170C (P x R)1/2 0.29 g Notes (1) Contact application engineering for values outside this range. (2) Maximum current for a given resistance value is calculated using I = P/R . (3) For tighter TCR, please contact application engineering: foil@vpgsensors.com. Note * This datasheet provides information about parts that are RoHS-compliant and/or parts that are non-RoHS-compliant. For example, parts with lead (Pb) terminations are not RoHS compliant. Please see the information/tables in this datasheet for details. Document No.: 63265 Revision: 12-Feb-2018 For any questions, contact foil@vpgsensors.com www.vishayfoilresistors.com 1 CSM3637F ABOUT CSM3637F The Key Applications The CSM3637F is a current sensing solution that was developed with a low TCR to meet demands for stable resistive product solutions in the industry. As it is critical for this resistor to reach thermal equilibrium quickly in circuits that require fast response or where the current changes swiftly, the CSM3637F is used where the emphasis is on accuracy and repeatability under stress conditions in applications requiring precision resistor performance up to 3 W. Applications as EB systems, switching power supplies, force-balanced scales all rely on current sense resistors to develop a precise voltage proportional to the current. Applications requiring accuracy and repeatability under stress conditions such as the following: Switching and linear power supplies Precision current-sensing Power management systems Feedback circuits Power amplifiers Measurement instrumentation Precision instrumentation amplifiers Medical and automatic test equipment Satellites and aerospace systems Commercial and Military avionics Test and measurement equipment Electronic scales AR Y The 4-pad CSM3637F Bulk Metal(R) Foil surface mount resistor features an improved load-life stability of max 0.05% at + 70C for 2000 h (rated power), a TCR of 10 ppm/C maximum from -55C to +125C, +25C ref., and a tolerance of 0.1%. * * * * * * * * * * * * Figure 2--Dimensions and Land Pattern in Inches (Millimeters) TOP VIEW Resistive element CSM3637F LAND PATTERN IN CSM3637F DIMENSIONS BOTTOM VIEW Lead frame Ceramic substrate als M L T I1 H min Ter E1 B I2 e W EL I E2 A c d b a Kelvin Connection I1, I2 -- Current E1, E2 -- Sense Dimensions--Tolerances 0.010 (0.254) L W H T A B 0.365 (9.271) 0.375 (9.525) 0.040 (1.016) 0.091 (2.311) 0.058 (1.473) 0.040 (1.016) a b c d e 0.390 (9.91) 0.066 (1.68) 0.024 (0.610) 0.178 (4.52) Land Pattern Dimensions--Tolerances 0.003 (0.076) PR 0.116 (2.95) www.vishayfoilresistors.com 2 For any questions, contact foil@vpgsensors.com Document No.: 63265 Revision: 12-Feb-2018 CSM3637F Table 3--Performance Specifications MIL-PRF-49465B R LIMITS Test/Condition Resistance Value 50 m to 200 m 20 m to <50 m 100 m 50 m to <100 m 20 m to <50 m Typical R Limits(1) 0.03% 0.05% 0.05% 0.2% 0.5% Max R Limits(1) 0.05% 0.1% 0.1% 0.5% 1% (0.5% +0.0005R) 20 m to 200 m 0.02% 0.03% (1.0% +0.0005R) 20 m to 200 m 0.2% 0.3% (0.5% +0.0005R) 20 m to 200 m 0.005% 0.01% (0.1% +0.0005R) 20 m to 200 m 0.02% 0.05% (0.25% +0.0005R) 20 m to 200 m 0.03% 0.05% (0.5% +0.0005R) Load-life stability 2000 h, +70C at rated power (1.0% +0.0005R) Short-time overload 5 x rated power, 5 s High temperature exposure 1000 h, 170C Moisture resistance MIL-STD-202, method 106, 0 power, 7a and 7b not required Shock 100 g, 6 ms, 5 pulses Resistance to soldering heat 10 s to 12 s at +260C Note (1) Measurement error allowed for R limits: 0.0005 . AR Y Thermal shock -65C to +150C, 5 cycles, 15 min at each extreme IN Figures 3--Global Part Number Information(1) NEW GLOBAL PART NUMBER: Y14750R20000B0R (preferred part number format) DENOTES PRECISION VALUE Y 1 4 CHARACTERISTICS R= 7 PRODUCT CODE M Y 5 0 R 2 0 0 0 0 = standard 9 = lead (Pb)-free 1 to 999 = custom 0 B = 0.1% C = 0.25% D = 0.5% F = 1.0% EL I 0 R PACKAGING RESISTANCE TOLERANCE 1475 = CSM3637F B W = waffle R = tape and reel FOR EXAMPLE: ABOVE GLOBAL ORDER Y1487 0R20000 B 0 R: TYPE: CSM3637F VALUE: 200.0 m ABSOLUTE TOLERANCE: 0.1% TERMINATION: standard tin/lead PACKAGING: tape and reel HISTORICAL PART NUMBER STYLE: CSM3637F 0R2000 B B T (will continue to be used) 0R2000 B MODEL OHMIC VALUE ABS. TOLERANCE PR CSM3637F 0.200 B = 0.1% C = 0.25% D = 0.5% F = 1.0% B TERMINATION S = lead (Pb)-free B = tin/lead T PACKAGING T = tape and reel W = waffle pack Note (1) For non-standard requests, please contact application engineering Document No.: 63265 Revision: 12-Feb-2018 For any questions, contact foil@vpgsensors.com www.vishayfoilresistors.com 3 Legal Disclaimer Notice Vishay Precision Group, Inc. Disclaimer ALL PRODUCTS, 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, "VPG"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. The product specifications do not expand or otherwise modify VPG's terms and conditions of purchase, including but not limited to, the warranty expressed therein. 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Product names and markings noted herein may be trademarks of their respective owners. Copyright Vishay Precision Group, Inc., 2014. All rights reserved. Document No.: 63999 Revision: 15-Jul-2014 www.vpgsensors.com 1