The LM4924 is unity-gain stable and requires no external

components besides gain-setting resistors, input coupling

capacitors, and proper supply bypassing in the typical appli-

cation. However, if a very large closed-loop differential gain

is required, a feedback capacitor (C

bandwidth limit the amplifier. This feedback capacitor cre-

ates 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 R

cause frequency response roll off before 20kHz. A typical

combination of feedback resistor and capacitor that will not

produce audio band high frequency roll off is Rf = 20k

Ω and

C

approximately 320kHz.

REFERENCE DESIGN BOARD and LAYOUT GUIDELINES

MSOP & SD BOARDS

(Note: R

20121030

FIGURE 4.

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