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LM4866 bảng dữ liệu(PDF) 9 Page - National Semiconductor (TI) |
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LM4866 bảng dữ liệu(HTML) 9 Page - National Semiconductor (TI) |
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9 / 21 page ![]() Typical Performance Characteristics (Continued) Channel Separation Power Supply Rejection Ratio 20018619 20018621 Open Loop Frequency Response Supply Current vs Supply Voltage 20018622 20018623 External Components Description (Refer to Figure 1.) Components Functional Description 1. R i The Inverting input resistance, along with R f, set the closed-loop gain. Ri, along with Ci, form a high pass filter with f c = 1/(2 πR iCi). 2. C i The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. C i, along with Ri, create a highpass filter with f c = 1/(2 πR iCi). Refer to the section, SELECTING PROPER EXTERNAL COMPONENTS, for an explanation of determining the value of C i. 3. R f The feedback resistance, along with R i, set the closed-loop gain. 4. C s The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for information about properly placing, and selecting the value of, this capacitor. 5. C B The capacitor, C B, filters the half-supply voltage present on the BYPASS pin. Refer to the SELECTING PROPER EXTERNAL COMPONENTS section for information concerning proper placement and selecting C B’s value. www.national.com 9 |
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