參數(shù)資料
型號(hào): LM4890ITLX/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝: MICRO, SMD-9
文件頁數(shù): 27/30頁
文件大小: 1621K
代理商: LM4890ITLX/NOPB
External Components Description (Figure 1)
Components
Functional Description
1.
R
IN
Inverting input resistance which sets the closed-loop gain in conjunction with R
f. This resistor also forms a
high pass filter with C
IN at fC= 1/(2
π R
INCIN).
2.
C
IN
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with R
IN at fc = 1/(2
π R
INCIN). Refer to the section, Proper Selection of External
Components, for an explanation of how to determine the value of C
IN.
3.
R
f
Feedback resistance which sets the closed-loop gain in conjunction with R
IN.
4.
C
S
Supply bypass capacitor which provides power supply filtering. Refer to the section, Power Supply
Bypassing, for information concerning proper placement and selection of the supply bypass capacitor,
C
BYPASS.
5.
C
BYPASS
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External
Components, for information concerning proper placement and selection of C
BYPASS.
LM4890
www.national.com
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