參數(shù)資料
型號: LM4901MM
元件分類: 音頻放大器
英文描述: AUDIO AMPLIFIER|SINGLE|TSSOP|10PIN|PLASTIC
中文描述: 音頻放大器|單|采用TSSOP | 10PIN |塑料
文件頁數(shù): 14/22頁
文件大?。?/td> 1177K
代理商: LM4901MM
Application Information
(Continued)
The LM4901 is unity-gain stable and requires no external
components besides gain-setting resistors, an input coupling
capacitor, and proper supply bypassing in the typical appli-
cation. However, if a closed-loop differential gain of greater
than 10 is required, a feedback capacitor (C4) may be
needed as shown in Figure 2 to bandwidth limit the amplifier.
This feedback capacitor creates a low pass filter that elimi-
nates possible high frequency oscillations. Care should be
taken when calculating the -3dB frequency in that an incor-
rect combination of R
and C
will cause rolloff before
20kHz. A typical combination of feedback resistor and ca-
pacitor that will not produce audio band high frequency rolloff
is R
= 20k
and C
= 25pf. These components result in a
-3dB point of approximately 320 kHz.
20019824
FIGURE 2. HIGHER GAIN AUDIO AMPLIFIER
L
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