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LM45 bảng dữ liệu(PDF) 7 Page - National Semiconductor (TI) |
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LM45 bảng dữ liệu(HTML) 7 Page - National Semiconductor (TI) |
7 / 11 page Typical Applications CAPACITIVE LOADS Like most micropower circuits, the LM45 has a limited ability to drive heavy capacitive loads. The LM45 by itself is able to drive 500 pF without special precautions. If heavier loads are anticipated, it is easy to isolate or decouple the load with a resistor; see Figure 4. Or you can improve the tolerance of capacitance with a series R-C damper from output to ground; see Figure 5. Any linear circuit connected to wires in a hostile environment can have its performance affected adversely by intense elec- tromagnetic sources such as relays, radio transmitters, mo- tors with arcing brushes, SCR transients, etc, as its wiring can act as a receiving antenna and its internal junctions can act as rectifiers. For best results in such cases, a bypass capacitor from V IN to ground and a series R-C damper such as 75 Ω in series with 0.2 or 1 µF from output to ground, as shown in Figure 5, are often useful. 01175408 FIGURE 4. LM45 with Decoupling from Capacitive Load 01175409 FIGURE 5. LM45 with R-C Damper 01175412 FIGURE 6. Temperature Sensor, Single Supply, −20˚C to +100˚C 01175414 FIGURE 7. 4-to-20 mA Current Source (0˚C to +100˚C) 01175415 FIGURE 8. Fahrenheit Thermometer 01175416 FIGURE 9. Centigrade Thermometer (Analog Meter) www.national.com 7 |
Số phần tương tự - LM45_05 |
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Mô tả tương tự - LM45_05 |
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