Bulk Metal� Foil Technology Small Package, Ultimate Tracking Voltage Dividers
Temperature Coefficient of Resistance: (See Figures 1 and 2 in data sheet "7 Technical Reasons to Specify Bulk Metal� Foil Resistor Networks.") TCR Tracking: � 0.5ppm/�CRatio Stability: 0.001% (10ppm) under load-life conditions 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 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.
MODEL NUMBER 300144 RESISTANCE VALUE* = 10K ABSOLUTE TOLERANCE RATIO MATCH TOLERANCE TCR TRACKING � 0.5 ppm/�C � 0.5 ppm/�C*Specify the resistance value for each resistor even if all values are the same.
VISHAY FOIL FRANCE +220.127.116.11.28.24 FAX: +18.104.22.168.27.31 GERMANY +49.9287.710 FAX: +49 9287.70435 ISRAEL +972.3.557.0945 FAX: +972.3.558.9121Bulk Metal Foil Technology Vishay Foil Resistors Small Package, Ultimate Tracking Voltage Dividers
FIGURE 1 - STANDARD PRINTING AND DIMENSIONS in inches (millimeters)
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.
VISHAY MODEL RESISTANCE RATIO 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)@ +85�C (for the entire resistive element + R2) divided proportionally between the two elements.
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: 300144 (1K/10K dual), the power rating would mW on the 1K and 182mW on the 10K, for a total 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.