Datenblatt-Suchmaschine für elektronische Bauteile |
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LM35DT Datenblatt(PDF) 9 Page - Texas Instruments |
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LM35DT Datenblatt(HTML) 9 Page - Texas Instruments |
9 / 29 page LM35 + OUT HEAVY CAPACITIVE LOAD, WIRING, ETC. TO A HIGH-IMPEDANCE LOAD L 75 1 2F 0.01 2F BYPASS OPTONAL LM35 + OUT 2 k HEAVY CAPACITIVE LOAD, WIRING, ETC. TO A HIGH-IMPEDANCE LOAD L LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 TYPICAL APPLICATIONS Figure 14. LM35 with Decoupling from Capacitive Load Figure 15. LM35 with R-C Damper CAPACITIVE LOADS Like most micropower circuits, the LM35 has a limited ability to drive heavy capacitive loads. The LM35 alone is able to drive 50 pf without special precautions. If heavier loads are anticipated, isolating or decoupling the load with a resistor is easy (see Figure 14). Or you can improve the tolerance of capacitance with a series R-C damper from output to ground (see Figure 15). When the LM35 is applied with a 200- Ω load resistor as shown in Figure 16, Figure 17, or Figure 19, the device is relatively immune to wiring capacitance because the capacitance forms a bypass from ground to input and not on the output. However, as with any linear circuit connected to wires in a hostile environment, performance is affected adversely by intense electromagnetic sources such as relays, radio transmitters, motors with arcing brushes, and SCR transients, as the wiring acts as a receiving antenna and the internal junctions act as rectifiers. For best results in such cases, a bypass capacitor from VIN to ground and a series R-C damper, such as 75 Ω, in series with 0.2 or 1 μF from output to ground are often useful. These are shown in Figure 24, Figure 24, and Figure 27. Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM35 |
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