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Y4471759R000Q1W Datasheet(PDF) 6 Page - Vishay Siliconix |
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Y4471759R000Q1W Datasheet(HTML) 6 Page - Vishay Siliconix |
6 / 7 page V5X5P, V15X5P, V15X10P Vishay Foil Resistors Bulk Metal ® Foil Technology Discrete Chips with TCR of 2 ppm/°C and Tolerance to 0.005 % for use in Hybrid Circuits www.vishay.com For any questions, contact: foil@vishay.com Document Number: 63024 6 Revision: 25-Oct-07 EFFECTS OF GOLD WIRE The bonding of the gold wires to the chip has an effect on the overall resistance and on the temperature coefficient, according to the length of wire used. The nomogram below shows the effect on both parameters with varying lengths of 0.001" (0.0254 mm) diameter gold wire. NOMOGRAM Change of resistance and TCR due to a length L of gold wire added at wire bonding. 500 360 250 160 120 90 62.5 40 22.5 10 50 23 16 10.5 6 4 2.25 1.40 0.82 0.47 0.30 0.16 0.11 600 350 225 130 85 41 25 16 10 6 1900 1100 610 400 230 150 85 53 31 18 11 6.1 4.2 2.3 1.5 0.85 0.50 0.32 0.15 0.10 0.06 0.04 0.02 1 1.4 2.2 3.2 4 6.2 9 12.2 16 25 36 49 64 81 100 144 225 324 400 625 900 1.2K 1.6K 2.5K 3.6K 4.9K 6.4K 8.1K 10K 14.4K 22.5K 32.4K 40K ppm % A B R Δ TCR ppm/°C ΔR R L thousandths of an inch total length of 2 gold wires of 0.001" diameter nominal resistance of chip as measured on its pads ( Ω) EXAMPLE: Total length of wires L = 0.100" (point A on left scale) Resistance of chip R = 200 Ω (point B on right scale) Read on intersection of line as with central scale: On left side - change of resistance: ΔR R On right side - change of TCR: ΔTCR = ± 2.3 ppm Nomogram based on the following specs for gold wire: • Conductivity 72 % of copper • 1.2 Ω/inch for 0.001" (0.0254 mm) diameter wire • TCR 3900 ppm/°C = 600 ppm |
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