LM4924SDBD National Semiconductor, LM4924SDBD Datasheet - Page 14

• Manufacturer Part Number: LM4924SDBD
• Description: BOARD EVALUATION LM4924SD
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM4924SDBD

• Amplifier Type: Class AB
• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 40mW x 2 @ 16 Ohm
• Voltage - Supply: 1.5 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM4924
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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The LM4924 is unity-gain stable and requires no external
components besides gain-setting resistors, input coupling ca-
pacitors, and proper supply bypassing in the typical applica-
tion. However, if a very large closed-loop differential gain is
required, a feedback capacitor (C
width limit the amplifier. This feedback capacitor creates a low
pass filter that eliminates possible high frequency oscillations.
REFERENCE DESIGN BOARD and LAYOUT GUIDELINES
MSOP & SD BOARDS
(Note: R
PU
2 is not required. It is used for test measurement purposes only.)
f
) may be needed to band-
FIGURE 4.
14
Care should be taken when calculating the -3dB frequency in
that an incorrect combination of R
response roll off before 20kHz. A typical combination of feed-
back resistor and capacitor that will not produce audio band
high frequency roll off is Rf = 20kΩ and C
components result in a -3dB point of approximately 320kHz.
f
and C
f
will cause frequency
f
= 25pF. These
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