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AN4439 Datasheet(PDF) 2 Page - STMicroelectronics |
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AN4439 Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 16 page ![]() Contents AN4439 2/16 DocID025908 Rev 1 Contents 1 The L99ASC03 current sense amplifier circuit . . . . . . . . . . . . . . . . . . . . 5 2 Calculating the input resistor values . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 Calculating the transfer function from input to CSO . . . . . . . . . . . . . . . . . . 8 3 Tolerance calculations induced by adding external resistors. . . . . . . 10 4 Generating a small offset to overcome input resistor tolerance and CSO lower limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1 Bench evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 |
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