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300144, 300145
Vishay Foil Resistors
Bulk Metal(R) 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(R) Foil Resistor Networks.") * TCR Tracking: to 0.5ppm/C
Product may not be to scale
* Ratio Stability: < 0.001% (10ppm) under load-life conditions * Ratio Match Tolerance: to 0.005%
THROUGH HOLE
* 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 300144 RESISTANCE VALUE* R1 = 10K R2 = 10K ABSOLUTE TOLERANCE 0.05% 0.05% RATIO MATCH TOLERANCE 0.01% 0.01% TCR TRACKING 0.5 ppm/C 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 300145
RESISTANCE VALUE* R1 = 5K R2 = 10K R3 = 5K R4 = 10K
ABSOLUTE TOLERANCE 0.01% ABS 0.01% ABS 0.01% ABS 0.01% ABS
RATIO MATCH TOLERANCE 0.005% MA 0.005% MA 0.005% MA 0.005% MA
TCR TRACKING 1ppm/C 1ppm/C 1ppm/C 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
* 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 90
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 300144 and Schematic2
0.295 (7.493) Date Code Model No. VISHAY 9825 300144 0.1 (2.54)
0.375 (9.525)
(R)
Model 300145 and Schematic2
0.2 (5.08) 6 5 4
Match Tolerance
10K000 0.01% 10K000
0.320 (8.128)
R1
R2
6
5
4
1
R4
1 2 3
Date Code Model No. VISHAY 9825 300145 0.375 (9.525)
10K000 0.01% 10K000
R3
0.751 (19.05)
Low Resistance Value Indicator
R1
1 2 3
R2
0.1 (2.54)
Tolerance: 0.010" 1. Lead wires: #22 AWG solder coated copper, 0.75" minimum length. 2. Each resistor contains 1 chip of two resistive elements.
0.751 (19.05)
Match Tolerance
THROUGH HOLE
1
2
3
1
2
3
0.1 (2.54)
TABLE 3 - MODELS 300144 AND 300145 SPECIFICATIONS
VISHAY MODEL RESISTANCE RATIO AVAILABLE1 () 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 POWER RATING 2, 4 STANDARD RESISTANCE TOLERANCE RATIO MATCH ABSOLUTE AVAILABLE TO AVAILABLE TO TCR TRACKING AVAILABLE TO SHELF LIFE STABILITY (ppm/yr)
300144 and 300145 3
0.2W @ +85C (for the entire resistive element R1 + R2) divided proportionally between the two elements.
< 0.5ppm/C For Like Values 0.005% 0.005% < 1.0ppm/C Standard 25
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 * 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
www.vishay.com 91

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