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LM4900MM データシート(PDF) 5 Page - National Semiconductor (TI) |
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LM4900MM データシート(HTML) 5 Page - National Semiconductor (TI) |
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5 / 19 page ![]() External Components Description (Figure 1) Components Functional Description 1. R i Inverting input resistance which sets the closed-loop gain in conjunction with R F. This resistor also forms a high pass filter with C i at fc = 1/(2π RiCI). 2. C i Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a highpass filter with R i at fc = 1/(2π RiCi). Refer to the section, Proper Selection of External Components, for an explanation of how to determine the value of C i. 3. R F Feedback resistance which sets the closed-loop gain in conjunction with R i. 4. C S Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for information concerning proper placement and selection of the supply bypass capacitor. 5. C B Bypass pin capacitor which provides half-supply filtering. Refer to the Proper Selection of External Components for information concerning proper placement and selection of C B. Typical Performance Characteristics THD+N vs Frequency DS200064-30 THD+N vs Frequency DS200064-31 THD+N vs Frequency DS200064-32 THD+N vs Frequency DS200064-33 www.national.com 5 |
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