參數(shù)資料
型號(hào): LM4819MX/NOPB
廠商: National Semiconductor
文件頁(yè)數(shù): 6/27頁(yè)
文件大?。?/td> 0K
描述: IC AMP AUDIO PWR .35W MONO 8SOIC
標(biāo)準(zhǔn)包裝: 1
系列: Boomer®
類型: AB 類
輸出類型: 1-通道(單聲道)
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量: 350mW x 1 @ 16 歐姆
電源電壓: 2 V ~ 5.5 V
特點(diǎn): 消除爆音,差分輸入,關(guān)閉
安裝類型: 表面貼裝
供應(yīng)商設(shè)備封裝: 8-SOIC
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
包裝: 剪切帶 (CT)
其它名稱: *LM4819MX/NOPB
LM4819MX/NOPBCT
SNAS133D – FEBRUARY 2001 – REVISED MARCH 2013
Figure 26. Higher Gain Audio Amplifier
The LM4819 is unity-gain stable and requires no external components besides gain-setting resistors, an input
coupling capacitor, and proper supply bypassing in the typical application. However, if a closed-loop differential
gain of greater than 10 is required, a feedback capacitor (C4) may be needed as shown in Figure 26 to
bandwidth limit the amplifier. This feedback capacitor creates a low pass filter that eliminates possible high
frequency oscillations. Care should be taken when calculating the -3dB frequency in that an incorrect
combination of R3 and C4 will cause rolloff before 20kHz. A typical combination of feedback resistor and
capacitor that will not produce audio band high frequency rolloff is R3 = 20k and C4 = 25pF. These components
result in a -3dB point of approximately 320 kHz. It is not recommended that the feedback resistor and capacitor
be used to implement a band limiting filter below 100kHz.
Figure 27. Differential Amplifier Configuration for LM4819
14
Copyright 2001–2013, Texas Instruments Incorporated
Product Folder Links: LM4819 LM4819MBD
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