LM4889

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SNAS157H – APRIL 2002 – REVISED MAY 2013

Figure 30. Higher Gain Audio Amplifier

The LM4889 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 30 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

result in a -3dB point of approximately 320kHz.

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