LM4900 National Semiconductor, LM4900 Datasheet - Page 5

• Manufacturer Part Number: LM4900
• Description: 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode
• Manufacturer: National Semiconductor

1.
2.
3.
4.
5.
Typical Performance Characteristics
THD+N vs Frequency
THD+N vs Frequency
Components
External Components Description
R
C
R
C
C
i
i
F
S
B
Inverting input resistance which sets the closed-loop gain in conjunction with R
high pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with R
Components, for an explanation of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the Proper Selection of External
Components for information concerning proper placement and selection of C
i
i
at f
at f
c
c
= 1/(2 R
= 1/(2 R
DS200064-30
DS200064-32
i
C
i
C
i
). Refer to the section, Proper Selection of External
I
).
Functional Description
(Figure 1)
THD+N vs Frequency
THD+N vs Frequency
5
i
.
i
.
B
F
.
. This resistor also forms a
DS200064-31
DS200064-33
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