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參數(shù)資料
| 型號： | LM4893MMX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | MSOP-10 |
| 文件頁數(shù)： | 18/22頁 |
| 文件大小： | 687K |
| 代理商： | LM4893MMX/NOPB |
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/(2
π R
iCi).
2.
C
i
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a
highpass filter with R
i at fc = 1/(2
π R
iCi). 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 section, Proper Selection of External
Components, for information concerning proper placement and selection of C
B.
Typical Performance Characteristics
THD+N vs Frequency
at V
DD = 5V, 8
R
L, and PWR = 250mW
THD+N vs Frequency
at V
DD = 3.0V, 8
R
L, and PWR = 150mW
20038037
20038038
THD+N vs Frequency
at V
DD = 2.6V, 8
R
L, and PWR = 100mW
THD+N vs Frequency
at V
DD = 2.6V, 4
R
L, and PWR = 100mW
20038039
20038040
LM4893
www.national.com
5
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