300144, 300145 Vishay Foil Resistors Bulk Metal® Foil Technology Small Package, Ultimate Tracking Voltage Dividers FEATURES • Temperature Coefficient of Resistance: (See Figures 1 and 2 in data sheet “7 Technical Reasons to Specify Bulk Metal® Foil Resistor Networks.”) • TCR Tracking: to ± 0.5ppm/°C • Ratio Stability: < ± 0.001% (10ppm) under load-life conditions Product may not be to scale THROUGH HOLE • Ratio Match Tolerance: to 0.005% • Absolute Tolerance: to 0.005% These voltage dividers are the first choice for accurate and stable division. Two resistors simultaneously etched into a piece of foil produce the maximum in TCR tracking without the need for curve matching of separate resistors. The size and very small footprint of the divider 300144 is also very important. This is the smallest foil divider available. A variety of ratios and impedance’s are already tooled and are shown in Table 1 on the following page. Small deviations from the ratios shown can be accommodated in the trim allowance already included in each side of the divider. Larger departures from the ratios shown may require new artwork. The 300145 is a pair of 300144 elements back to back in a single molded package. Although performance between dividers is not quite as good as within each divider, it is the most accurate and stable full bridge or differential gain setting device made. TABLE 1 - ORDERING INFORMATION - 300144 MODEL NUMBER RESISTANCE VALUE* ABSOLUTE TOLERANCE RATIO MATCH TOLERANCE TCR TRACKING 300144 R1 = 10KΩ ± 0.05% ± 0.01% ± 0.5 ppm/°C R2 = 10KΩ ± 0.05% ± 0.01% ± 0.5 ppm/°C *Specify the resistance value for each resistor — even if all values are the same. TABLE 2 - ORDERING INFORMATION - 300145 MODEL NUMBER RESISTANCE VALUE* ABSOLUTE TOLERANCE RATIO MATCH TOLERANCE TCR TRACKING 300145 R1 = 5KΩ ± 0.01% ABS ± 0.005% MA ± 1ppm/°C R2 = 10KΩ ± 0.01% ABS ± 0.005% MA ± 1ppm/°C R3 = 5KΩ ± 0.01% ABS ± 0.005% MA ± 1ppm/°C R4 = 10KΩ ± 0.01% ABS ± 0.005% MA ± 1ppm/°C *Specify the resistance value for each resistor — even if all values are the same. VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31 • GERMANY +49.9287.710 FAX: +49 9287.70435 • ISRAEL +972.3.557.0945 FAX: +972.3.558.9121 www.vishay.com 90 • ITALY + 39.2.300.11919 FAX: +39.2.300.11999 • JAPAN +81.42.729.0661 FAX: +81.42.729.3400 • SINGAPORE +65.788.6668 FAX: +65.788.0988 • SWEDEN +46.8.594.70590 FAX: +46.8.594.70581 • UK +44 191 514 8237 FAX: +44 1953 457 722 • USA +1 610 407-4800 FAX: +1 610 640-9081 Document Number: 63045 Revision 19-Jul-02 300144, 300145 ® Bulk Metal Foil Technology Vishay Foil Resistors Small Package, Ultimate Tracking Voltage Dividers FIGURE 1 - STANDARD PRINTING AND DIMENSIONS in inches (millimeters) Model 300145 and Schematic2 Model 300144 and Schematic2 0.320 (8.128) 1 Low Resistance Value Indicator 0.751 (19.05) 1 2 6 10K000 0.01% 10K000 VISHAY 9825 300144 Match Tolerance R1 1 4 6 R2 2 3 Date Code Model No. 3 VISHAY 9825 300145 0.375 (9.525) 4 R4 R3 R1 R2 1 2 2 3 3 0.1 (2.54) TABLE 3 - MODELS 300144 AND 300145 SPECIFICATIONS VISHAY MODEL 300144 and 300145 3 RESISTANCE RATIO AVAILABLE1 (Ω) STANDARD RESISTANCE TOLERANCE RATIO MATCH ABSOLUTE AVAILABLE TO AVAILABLE TO POWER RATING 2, 4 100/12.3K 500/500 500/15K 800/800 1K/1K 1K/2K 1.5K/3K 2K/2K 2K/3K 2K/4K 2K/20K 2.7K/10K 3K/6K 5K/5K 5K/10K 5.5K/7.7K 6K/6K 6K/20K 10K/10K 10K/20K 15K/15K 20K/20K 0.2W @ +85°C (for the entire resistive element R1 + R2) divided proportionally between the two elements. TCR TRACKING AVAILABLE TO SHELF LIFE STABILITY (ppm/yr) < ± 0.5ppm/°C For Like Values ± 0.005% ± 0.005% 25 < ± 1.0ppm/°C Standard 1. For resistance ratios not shown, contact Vishay’s Applications Engineering Department. The 300144 can be made available in any required ratio between the resistance values of 100 ohms and 20Kohms, such that R1 can be any value between 100 ohms and 20Kohms and R2 can also be any value between 100 ohms and 20Kohms. New art work is required. 2. Power is proportional to the divider ratio. Example: In a 300144 (1K/10K dual), the power rating would be 18 mW on the 1K and 182mW on the 10K, for a total of 200mW on R1 + R2. R1 R2 P1 = R1 + R2 P P2 = R1 + R2 P ( ) ( ) 3. Any value from 100 ohms to 20Kohms inclusive is available with some derating of power. (See data sheet “VHD200 and VHD144.”) 4. Maximum working voltage is 200 Volts. VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31 • GERMANY +49.9287.710 FAX: +49 9287.70435 • ISRAEL +972.3.557.0945 FAX: +972.3.558.9121 Document Number: 63045 Revision 19-Jul-02 • ITALY + 39.2.300.11919 FAX: +39.2.300.11999 • JAPAN +81.42.729.0661 FAX: +81.42.729.3400 • SINGAPORE +65.788.6668 FAX: +65.788.0988 • SWEDEN +46.8.594.70590 FAX: +46.8.594.70581 • UK +44 191 514 8237 FAX: +44 1953 457 722 • USA +1 610 407-4800 FAX: +1 610 640-9081 www.vishay.com 91 THROUGH HOLE 1 1. Lead wires: #22 AWG solder coated copper, 0.75" minimum length. 2. Each resistor contains 1 chip of two resistive elements. 5 Match Tolerance 0.751 (19.05) Tolerance: ±0.010" 0.1 (2.54) 5 0.2 (5.08) 10K000 0.01% 10K000 0.1 (2.54) 0.295 (7.493) Date Code Model No. 0.375 (9.525)